organize ssenam'2 - univ-chlef.dz · nature & technology will be the supporting journal of...

1 SSENAM'2 University Hassibabenbouali of Chlef www.univ-chlef.dz/

HassibaBenbouali University of Chlef, Chlef- Algeria

Organize

SSENAM'2

The Second

Students Symposium on Engineering Application of Mechanics

Republic Algerian Democratic and Popular

TENTATIVE PROGRAM


Welcome to the Hassiba Benbouali University

Welcome to Chlef, Algeria


Supported by

Organized by

Laboratory for Theoretical Physics and Materials Physics, LPTPM, University Hassiba Benbouali of Chlef, Algeria

Laboratory of Control, testing, Measurement and Simulation in Mechanics. University Hassiba Benboauli of Chlef, Algeria

Laboratory for Rheology and Mechanics, LRM, University University Hassiba Benboauli of Chlef, Algeria

Laboratory for Mechanics & Energetic, LME, University University Hassiba Benboauli of Chlef, Algeria

Laboratory of Quantum Material Physics and Mathematical Modeling University Mustapha Stambouli of Mascara, Algeria.

Laboratory for Advanced Mechanics, LMA, University Sciences and Technology Houari Boumediene, Algiers, Algeria.

Laboratory of Mechanics : Simulation & Experimentation, L2ME, University of Tahri Mohamed of Bechar, Algeria.

Laboratoire de Mécanique, Biomécanique, Structure,

Polymère et Structures, Metz, France

Ecole Nationale d’Ingénieurs de Metz, France

Mechanical Engineering Research, Academy of

Sciences,101990 Moscow, Russia

University of Zegreb, Zegreb, Croatia

University of Belgrade, Serbia Faculty of Technology and Metallurgy, University of

Belgrade

Sponsoring

University Mustapha Stambouli, Mascara, Algeria

University Hassiba Benbouali Chlef, Algeria

University Houari Boumedien for Sciences and Technology, Algiers, Algeria University Tahri Mohamed, Bechar


Aim & Objectives of the SSENAM '2

The objective of the Second Students Symposium on Engineering Application of Mechanics, "SSENAM'2" will be focus on the "Engineering and Applied Fracture Mechanics and Environment" and destined directly on the PhD student evolution. The SSENAM'2 will be held in the Campus of Hassiba Benbouali University of Chlef, on the 13, 14 December 2017 with the collaboration of the Mustapha Stambouli University of Mascara and Houari Boumediene, University of Sciences and Technology in Algiers and University of Tahri Mohamed of Bechar. Co-organized by the Laboratory for Theoretical Physics and Materials Physics from the Hassiba Benbouali University of Chlef , The Laboratory of Quantum Material Physics and Mathematical Modeling In Mascara University, The laboratory for Advanced Mechanics, LMA from University Sciences and Technology Houari Boumediene, Algiers, Algeria and the Laboratory of Mechanics: Simulation &Experimentation,L2ME, of University of Tahri Mohamed of Bechar, Algeria.

The aims of the first Symposium will be to discuss the present status of the Applied mechanics based constitutive simulation, Reohology and modeling of materials and associated experimental observations methods. It's also an opportunity for scientists and engineers from Algerians Master, Phd Students from the three universities to discuss research activities that could be a basis for future collaborations. Nature & Technology will be the supporting journal of the Symposium where all reviewed and accepted conference papers will be published in special issue "Engineering Applied Fracture Mechanics and Environment".

This event will give an overview of the different physics-based models, simulations and the experimental studies for theoretical phenomena and materials. The emphasis will be on the meso-scale, corresponding to grains, which is the relevant length-scale for many basic material properties and degradation mechanisms. Associated experimental studies and the multi-scale models from dislocation to phenomenological macro-scale studies are in the scope of the Conference. The Conference is also an opportunity for scientists and engineers from Algerians Master, Phd Students, Maghreb countries Communities and EU Member States to discuss research activities that could be a basis for future collaborations.


CONFERENCE TOPICS

Session 1: Structural mechanics

Session 2: Fluid mechanics

ABSTRACT SUBMISSION AND REGISTRATION

Second Students Symposium on Engineering Application of Mechanics, "SSENAM'2"is open for registration now. Abstracts (in word format) not exceeding 400 words, for presentations and posters, are to be submitted to the Conference email address [email protected]. The registration could be done by sending the registration form to the conference email address. The number of participants is limited and preference will be given participants who submit an abstract or PhD participants.

REGISTRATION FEE KEY DATES & FUNDING

Registration Fees are 2500 DA, payable in advance of the conference, includes: Access to the Conference sessions, Poster area and Workshops, all conference documents and certificate of attendance, lunch, dinner and mid-session refreshments as scheduled in the Conference program. Deadline for abstract submission, December 4, 2017 Notification of abstract acceptance, December 5, 2017 The official language of the Symposium SSENAM'2 meeting is Arabic, English and French. The Official language of the International Conference SSENAM'2meeting is English. All the invited talks, oral and poster contributions must be done in English. Abstract Submission

Participants, who would like to make an oral or poster presentation at the SSENAM'2 must submit an abstract for the consideration and approval of the Program Committee. All abstracts must be written, according to the Abstract Template, in English and submitted by e-mail, in format word at e-mail: [email protected]

LOCATION

Chlef, the capital of Chlef Province, is located in the north of Algeria 200 kilometres west of the capital Algiers. It is home to the Hassiba Ben Bouali university, and the basilica of Saint Reparatus, which is home to the oldest Christian labyrinth in the world and the site of the Roman citadel, CastellumTingitanum, was known as Al-Asnam (Arabic for "sculptures") for an area of 600 by 300 metres (2,000 by 980 feet) containg many statues.


During the Roman times, the chlef Province of Algeria was named Castellum Tingitanum. For the French, the old Roman site was the ideal location to construct a military out post in 1843, which they named Orleansville. It was also the reason that one of the oldest churches in Africa came to be located here. No-one could predict that in 1954, the first earthquake would strike Orleansville, and that it was only a taste of what was to come. Together with celebrating the independence of Algeria in 1964, the city also celebrated the birth of a new name - El Asnam.

In 1980 disaster struck again, with a 8 earthquake hitting the city and surrounding areas, in which half the city was destroyed and approximately five thousand locals lost their lives. To distance the city and the province from this unthinkable tragedy, it was renamed for a last time to chlef in 1981. Today, visitors will still be able to visit what remains of the Castellum Tingiranum (roman citadel), referred to as Al Asnam. It is a fascinating site as it contains a staggering number of statues. It is also home to the world’s most ancient Christian labyrinths, Saint Reparatus. But mostly, visitors will see endless agricultural landscapes which include dairy farms, fruit orchards and fields filled with barley and wheat. The city is also known for its processing facilities and leather products. Chlef is easy to find and travel to, as it is a vital point on both the rail and road routes that run between Oran and Algiers.


History of SSENAMCongress The Congress SSENAM'1 was founded onavril 2017 by the "Laboratory of Quantum Material Physics and Mathematical Modeling University Mustapha Stambouli of Mascara, Algeria" as a biannual meeting.

SSENAM'1. The Scientific Committee

SSENAM’1. Some pictures on the reception, opening ceremony and the Social Programme.


Organizing Committee

Chairman's

Mohammed hadjmelianiKhelil Ali Chahinez Fares Khlil Ali

Members

Mohammed hadjmeliani Khelil Ali Chahinez Fare Abdella Benarou Omsalem Abdellah Muthanna Bassam Gamal Nasser Hocine Bokort Soudani Mohamed Bensalem Chafik Bouledroua Omar Elazzizi Abdellah Ghouaoula abdelhamid Ouagued Malika Merym Bengalia Amel Mohamed Sadou NatecheTaherHebbal Brahim

Scientific Committee

Chairman's

Hadj Meliani Mohammed Aid Abdelkrim Khelil Ali Univ Hammadi Fodil Boukharouba Taoufik Hamou Zahloul Brahim Zidane Tahar Abbes Abdelkader Hocine Abedi Bouabdellah Guy Pluvinage, Members Fares Chahinez, Algeria Belouchrani M.Amine, Algeria Fodil Hammadi, AlgeriaKhaled El-Miloudi, Algeria Mustpaha Allouti, Algeria Mahmoudi Hacène, Algeria Abdelah Ouagued, Algeria Hamza Samir , Tunisia

Publication All conference papers will be published in the SSENAM2 Proceedings, with soft copies provided on a USB key. Selected papers presented at SSENAM will be compiled and published:

1- In the Journal “ Nature & Technology” Classe A: Fundamental and Engineering Sciences edited by Hassiba Ben Bouali University Of Chlef-Algeria, under ISSN 1112-9778. www.univ-chlef.dz/revuenatec

2- In Journal of the Oil and Oil Products Pipeline Transportation: Science & Technology journal. The Oil and Oil Products Pipeline Transportation: Science & Technology is a specialized scientific periodical established as part of Transneft Research and Development Institute for Oil and Oil Products Transportation (Transneft R&D, LLC) for facilitating the innovation exchange and raising the professional level of national and foreign experts engaged in oil and petroleum products pipeline transportation.


Travel and Weather Can you make some horaire for train or transportation (Bejaia, Skikda, Tebessa, Annaba, ...) to ChlefAll the directions will coming soon on the final programme. Weather December in Chlef is cloudy and/or sometimes running. The average daily temperature is about 18°C, with lows of around 10°C. It is an ideal time for tourists to enjoy the beautiful sites of Chlef.

Recommended Hotels The reception and others accommodation will be in the WANCHARIS HOTEL (single room: 2500 DA, double room: 3500 DA and Triple room: 4500DA).


Technical Program

The SSENAM’2 symposium will be take place at the Central Bibliotheque on the Hassiba benbouali university of chlef (Hay Salem, route nationale N° 19).

Tuesday 12Decembre

Wenesday 13

Decembre

Thursday 14

Decembre

8 :00-8 :30

—

Registration 8 :30-9 :00 Keynote Solid Session

Keynote Fluid Session

8 :30-9 :10 Opening Ceremony

9 :00-9 :00 Oral

Presentation Solid Session

Oral Presentation Fluid Session

9:10-10 :00 Plenary Lectures

10:00-10 :25 Coffee Break 10:00-10 : 30 Coffee Break

10 :25-10 :45

Reception of International Deleguation

Keynote Solid Session


10 : 30-12 : 45

Oral Presentation Solid Session

10 :45-12 :45 Oral



12 :45-14 :00 Lunch Time 12 :45-14 :00 Lunch Time

14 :00-15 :30



14 :00-15 :30

Oral Presentation

Solid Session

15 :30 -16 : 00 Coffee Break 15 :30-16 :00 Coffee Break 16 :00 - 17 :00 Poster Presentation

19 :00 Round Table at hotel El-Wanchatissi


List of the Plenary Lectures, Oral and Poster Presentations

SSENAM'2

Name/First Name University

Plenary Lectures Cln. Boualem METTAI L'Institut National de Criminalistique et de Criminologie de la Gendarmerie Nationale. Ing. Boualem MOKHANEG La Station Régionale de la protection des Végétaux de Chlef. Dr. AzedineBelalia LME, HassibaBenbouali University of Chlef, Algeria.

Oral Presentation Solid Session Mohammed El SallahZagane LMPM, Department of Mechanical Engineering, University of SidiBel Abbes, Algeria. D. SaidLhadj ENSH , MVRE Laboratory, BLIDA Algeria A. BRAHAMI University of DjilaliLiabes, Algeria. GOUMGHAR Amirouche University of Tizi-Ouzou, Algeria Abdeldjalil BENFOUGHAL Laboratoire de Génie Chimique (LGC), Blida, Algeria. TassaditCherfi University of MouloudMammeri, Tiziouzou, Algeria Bouhamidi Y Controls, Testing, Measurement and Simulation Mechanical laboratory, Chlef, Algeria LemyaHanifiHachemi Amar University, of Saïda, Algeria Habibi Samir University, of Mascara, Algeria HachellafKaddour Laboratoire LSTE, Université Mustapha Stambouli de Mascara, Algérie Y. Chahraoui University of Sidi-Bel Abbes, Algeria R.Mahdjoubi Université Badji Mokhtar, Annaba, B.P. 12, Algerie N. Si Ziani Université Mustapha Stambouli, Mascara, Algerie F.MESSAOUD University of Tlemcen,1300Tlemcen ,Algeria T. Bousnane University SidiBel Abbes, 22000, Algérie H. Fourn University of SidiBel Abbes, Algeria Fouad.Bourada University Center BelhadjBouchaib of AinTemouchent, Algeria N. Ouafek Research Center in Industrial Technologies CRTI, Cheraga,Algiers, Algeria A. Taghezout University of Mascara, Algeria K. Benyahi University of Tizi-Ouzou,UMMTO, BP 17 RP15000, Tizi-Ouzou, Algeria M. Foukrach Mechanical faculty of Engineering, USTO-MB 1505 EL M’naouar, Oran,Algeria Mama Ahouel Laboratory of materials and hydrology, Sidi-Bel-Abbes, Algeria A. Benaissa University, of DjillaliLiabes, Department of Civil Engineering, Fac.Technology A.Remadna NMISSI Laboratory, Mohamed Khider-Biskra University, Algeria L. Deghoul Tizi-Ouzou, Algeria Nebab Mokhtar University of Chlef, Algeria N. Mahmoudi Laboratoire Génie Industriel et Développement Durable, Relizane F. MESSAOUD Université de Tlemcen, Algeria A. Zerrouki University of SidiBel Abbes 22000, Algeria N. Deghoul University of Oran, Algérie

Poster Presentation Solid Session KLOUCHE Faiza University of Mostaganem, Algeria Z. Mentouri University of, Guelma, Algeria Y. Chahraoui University of SidiBel Abbes, Algeria A .Deliou University of SidiBelabbes, Algeria Ahmed Bakora University of SidiBelAbes Algeria Zine Abdallah, Centre Universitaire Ahmed ZabanaRelizane, Algeria K. Gherfi Research Center in Industrial Technologies, Algeria A, Deliou Université of Sidi Belabbes, Algérie K.RAKRAK Unisversity of Tiaret, Algeria

B. Hamadi University of Annaba, Algeria H. Khellafi University of Mascara Algeria Ammar BOULAL University of Tiaret, Algérie


Abualnour University of Mustapha Stambouli à Mascara,Algeria.

A. Mouffoki University of SidiBel Abbes, Algeria Hafida Driz Laboratoire (LMH) Materiaux et Hydrologie, Université de Sidi Bel Abbes, Algeria S. Nechad University of Chlef, Algeria Mustapha KAID UniversityodSidiBel Abbes, ALGERIA A OUZERIAT University Mouloud MAMMERI of Tizi-Ouzou, BP 17RP. Algeria. A. Alioua University of Tizi-Ouzou,Algeria. M. Benchohra University of SidiBel Abbes, Algeria M. BEDROUNI Center Salhi Ahmed of Naâma, Algeria. Hamidi Ahmed University of Bechar, Alger M. Braikia University, HassibaBenBouali of Chlef, Algeria. MayasSaeed University of Chlef, Algeria S. Chaib University of Constantine, Algeria O. Cheref University of SidiBel-Abbe, Algeria F. Khelil University Mustapha Stambouli, Mascara, Algeria L. Madouni University Mouloud MAMMERI of Tizi-Ouzou, Algeria Youcef Bouhamidi University of Chlef, Algeria AdelBoudiaf University of Sciences and Technology, Oran, Algeria Hamamousse K, University of Sciences and Technology, Oran, Algeria. Taleb Ouahiba Laboratoire des Matériaux et Hydrologie, University of de Sidi Bel Abbes, Algeria. Hafida Driz University of SidiBel Abbes, Algeria F. Benaoum LPQ3M laboratory, University Mustapha Stambouli, Mascara, Algeria. A. BELAZIZ Université Sidi Bel Abbés, Algérie. A. BELAZIZ Université Sidi Bel Abbés, Algérie

Oral PresentationFluid session D. SaidLhadj National High School for Hydraulics ( ENSH) ,MVRE Laboratory,BLIDAAlgerie M. Mechalikh University of HassibaBenboualiChlef. Algeria G. Habbar University of HassibaBenboualiChlef. Algeria. C. Bensalem University of HassibaBenboualiChlef. Algeria Houari Ameur Department of Technology, Institute of Science and Technology, Naâma, Algeria LaidoudiHoussem University of Oran ,Algeria M. Bouamama University of SidiBel Abbes Algeria S. MOKRANE, University, DjillaliLiabes de Sidi Bel-Abbes, Algeria Abderrahmane AISSA University of Mascara, ,Algeria. F. Bouregba Laboratoire-Hydrodynamique Naval (LAHN) USTO MB, USTO, Oran Algeria Z. Harchouche University of Sidi-Bel-Abbes, Algeria K. Nechab University of Chlef, Algeria A.Maizia University of Chlef, Algeria Y.KAMLA University of Chlef, Algeria Mohamed Amine MEDEBBER Université de Mostaganem, Algeria Ali Benouis University of Saida, Algeria BENABBOUN Radjaa University, of DjillaliLiabes , Algeria M. BEZZERROUKI UniversityDjilaliLiabes de Sidi-Bel-Abbès, Algeria K. AIMENE Université Mouloud MAMMERI de Tizi-Ouzou, Algérie A.Bensari University, Sidi Belabbes, Algérie W. Bensmain University of SidiBel Abbes, Algeria Ahmed BOUKHARI University of SidiBel Abbes, Algérie I. Ait Sidhoum University of Sciences and Technologie d'ORAN , Algérie HOUARI TAREK University of Mascara, Algérie S. LIAMANI Université of Sidi Bel Abbes, Algérie Mohamed MEDANI Université of Tiaret, Algeria ZAOUI Fatima Zohra Laboratoire de Modélisation Numérique et Expérimentale des Phénomènes

Mécaniques (LMNEPM), Université Abdelhamid Ibn-Badis, Mostaganem, Algeria Habibi Samir University, of, Mascara, Algeria N. Mahmoudi Laboratoire Génie Industriel et Développement Durable, Universitaire Relizane


Contact e-mail: [email protected] https://www.Univ-chlef.dz/lptpm https://www.facebook.com/uhbc.dzTél: (+213) 27 72 17 94 Mobile: (+213) 7 70709563 Fax: +213 27 72 17 94

Bassam Gamal Nasser MUTHANNA LRM,University of Chlef, Esalem City, 02000, Chlef, Algeria SOUDANI Mohamed LPTPM, University BenBouali of Chlef O. Bouledroua LPTPM, University BenBouali of Chlef Belkacem Amine KESSAL LPTPM, University BenBouali of Chlef

Poster presentationSession 2: Fluid mechanics Sofiane Bolkroune Research Center in Industrial Technologies CRTI, Algeria Z.Benhalima University of Mascara, Algeria R. Dehane SONATRACH/GL1Z,New Projects Department, Arzew,Algeria FARES Redouane University of Sciences et de la Technologie - Oran, Algeria S. Dahamni University of chlef, chlef Algeria AbdEllatifAmor University of chlef, chlef Algeria B. Elmossouess University of ORAN, Algeria A .Chemi Université de Sidi Bel Abbés, Algerie Amina ABDI Université de Moustafa ben Boulaid-Batna, Algeria M. Foukrach USTO-MB 1505 EL M’naouar, Oran,Algeria


HassibaBenbouali University of Chlef, Chlef- Algeria

Organize

SSENAM'2

The Second

Students Symposium on Engineering Application of Mechanics

Republic Algerian Democratic and Popular

TENTATIVE PROGRAM


Welcome to the Hassiba Benbouali University

Welcome to Chlef, Algeria


Supported by

Organized by

Laboratory for Theoretical Physics and Materials Physics, LPTPM, University Hassiba Benbouali of Chlef, Algeria

Laboratory of Control, testing, Measurement and Simulation in Mechanics. University Hassiba Benboauli of Chlef, Algeria

Laboratory for Rheology and Mechanics, LRM, University University Hassiba Benboauli of Chlef, Algeria

Laboratory for Mechanics & Energetic, LME, University University Hassiba Benboauli of Chlef, Algeria

Laboratory of Quantum Material Physics and Mathematical Modeling University Mustapha Stambouli of Mascara, Algeria.

Laboratory for Advanced Mechanics, LMA, University Sciences and Technology Houari Boumediene, Algiers, Algeria.

Laboratory of Mechanics : Simulation & Experimentation, L2ME, University of Tahri Mohamed of Bechar, Algeria.

Laboratoire de Mécanique, Biomécanique, Structure,

Polymère et Structures, Metz, France

Ecole Nationale d’Ingénieurs de Metz, France

Mechanical Engineering Research, Academy of

Sciences,101990 Moscow, Russia

University of Zegreb, Zegreb, Croatia

University of Belgrade, Serbia Faculty of Technology and Metallurgy, University of

Belgrade

Sponsoring

University Mustapha Stambouli, Mascara, Algeria

University Hassiba Benbouali Chlef, Algeria

University Houari Boumedien for Sciences and Technology, Algiers, Algeria University Tahri Mohamed, Bechar


Aim & Objectives of the SSENAM '2

The objective of the Second Students Symposium on Engineering Application of Mechanics, "SSENAM'2" will be focus on the "Engineering and Applied Fracture Mechanics and Environment" and destined directly on the PhD student evolution. The SSENAM'2 will be held in the Campus of Hassiba Benbouali University of Chlef, on the 13, 14 December 2017 with the collaboration of the Mustapha Stambouli University of Mascara and Houari Boumediene, University of Sciences and Technology in Algiers and University of Tahri Mohamed of Bechar. Co-organized by the Laboratory for Theoretical Physics and Materials Physics from the Hassiba Benbouali University of Chlef , The Laboratory of Quantum Material Physics and Mathematical Modeling In Mascara University, The laboratory for Advanced Mechanics, LMA from University Sciences and Technology Houari Boumediene, Algiers, Algeria and the Laboratory of Mechanics: Simulation &Experimentation,L2ME, of University of Tahri Mohamed of Bechar, Algeria.

The aims of the first Symposium will be to discuss the present status of the Applied mechanics based constitutive simulation, Reohology and modeling of materials and associated experimental observations methods. It's also an opportunity for scientists and engineers from Algerians Master, Phd Students from the three universities to discuss research activities that could be a basis for future collaborations. Nature & Technology will be the supporting journal of the Symposium where all reviewed and accepted conference papers will be published in special issue "Engineering Applied Fracture Mechanics and Environment".

This event will give an overview of the different physics-based models, simulations and the experimental studies for theoretical phenomena and materials. The emphasis will be on the meso-scale, corresponding to grains, which is the relevant length-scale for many basic material properties and degradation mechanisms. Associated experimental studies and the multi-scale models from dislocation to phenomenological macro-scale studies are in the scope of the Conference. The Conference is also an opportunity for scientists and engineers from Algerians Master, Phd Students, Maghreb countries Communities and EU Member States to discuss research activities that could be a basis for future collaborations.


CONFERENCE TOPICS

Session 1: Structural mechanics

Session 2: Fluid mechanics

ABSTRACT SUBMISSION AND REGISTRATION

Second Students Symposium on Engineering Application of Mechanics, "SSENAM'2"is open for registration now. Abstracts (in word format) not exceeding 400 words, for presentations and posters, are to be submitted to the Conference email address [email protected]. The registration could be done by sending the registration form to the conference email address. The number of participants is limited and preference will be given participants who submit an abstract or PhD participants.

REGISTRATION FEE KEY DATES & FUNDING

Registration Fees are 2500 DA, payable in advance of the conference, includes: Access to the Conference sessions, Poster area and Workshops, all conference documents and certificate of attendance, lunch, dinner and mid-session refreshments as scheduled in the Conference program. Deadline for abstract submission, December 4, 2017 Notification of abstract acceptance, December 5, 2017 The official language of the Symposium SSENAM'2 meeting is Arabic, English and French. The Official language of the International Conference SSENAM'2meeting is English. All the invited talks, oral and poster contributions must be done in English. Abstract Submission

Participants, who would like to make an oral or poster presentation at the SSENAM'2 must submit an abstract for the consideration and approval of the Program Committee. All abstracts must be written, according to the Abstract Template, in English and submitted by e-mail, in format word at e-mail: [email protected]

LOCATION

Chlef, the capital of Chlef Province, is located in the north of Algeria 200 kilometres west of the capital Algiers. It is home to the Hassiba Ben Bouali university, and the basilica of Saint Reparatus, which is home to the oldest Christian labyrinth in the world and the site of the Roman citadel, CastellumTingitanum, was known as Al-Asnam (Arabic for "sculptures") for an area of 600 by 300 metres (2,000 by 980 feet) containg many statues.


During the Roman times, the chlef Province of Algeria was named Castellum Tingitanum. For the French, the old Roman site was the ideal location to construct a military out post in 1843, which they named Orleansville. It was also the reason that one of the oldest churches in Africa came to be located here. No-one could predict that in 1954, the first earthquake would strike Orleansville, and that it was only a taste of what was to come. Together with celebrating the independence of Algeria in 1964, the city also celebrated the birth of a new name - El Asnam.

In 1980 disaster struck again, with a 8 earthquake hitting the city and surrounding areas, in which half the city was destroyed and approximately five thousand locals lost their lives. To distance the city and the province from this unthinkable tragedy, it was renamed for a last time to chlef in 1981. Today, visitors will still be able to visit what remains of the Castellum Tingiranum (roman citadel), referred to as Al Asnam. It is a fascinating site as it contains a staggering number of statues. It is also home to the world’s most ancient Christian labyrinths, Saint Reparatus. But mostly, visitors will see endless agricultural landscapes which include dairy farms, fruit orchards and fields filled with barley and wheat. The city is also known for its processing facilities and leather products. Chlef is easy to find and travel to, as it is a vital point on both the rail and road routes that run between Oran and Algiers.


History of SSENAMCongress The Congress SSENAM'1 was founded on avril 2017 by the "Laboratory of Quantum Material Physics and Mathematical Modeling University Mustapha Stambouli of Mascara, Algeria" as a biannual meeting.

SSENAM'1. The Scientific Committee

SSENAM’1. Some pictures on the reception, opening ceremony and the Social Programme.


Organizing Committee

Chairman's

Mohammed hadjmelianiKhelil Ali Chahinez Fares Khlil Ali

Members

Mohammed hadjmeliani Khelil Ali Chahinez Fare Abdella Benarou Omsalem Abdellah Muthanna Bassam Gamal Nasser Hocine Bokort Soudani Mohamed Bensalem Chafik Bouledroua Omar Elazzizi Abdellah Ghouaoula abdelhamid Ouagued Malika Merym Bengalia Amel Mohamed Sadou NatecheTaherHebbal Brahim

Scientific Committee

Chairman's

Hadj Meliani Mohammed Aid Abdelkrim Khelil Ali Hammadi Fodil Boukharouba Taoufik Hamou Zahloul Brahim Zidane Tahar Abbes Abdelkader Hocine Abedi Bouabdellah Guy Pluvinage

, Members

Fares Chahinez Belouchrani M.Amine Fodil Hammadi Algeria Khaled Khaled El-Miloudi Mustpaha Allouti Mahmoudi Hacène Abdelah Ouagued Hamza Samir Boulerdroua Omar Omsalem Abdellah

Publication All conference papers will be published in the SSENAM2 Proceedings, with soft copies provided on a USB key. Selected papers presented at SSENAM will be compiled and published:

1- In the Journal “ Nature & Technology” Classe A: Fundamental and Engineering Sciences edited by Hassiba Ben Bouali University Of Chlef-Algeria, under ISSN 1112-9778. www.univ-chlef.dz/revuenatec

2- In Journal of the Oil and Oil Products Pipeline Transportation: Science & Technology journal. The Oil and Oil Products Pipeline Transportation: Science & Technology is a specialized scientific periodical established as part of Transneft Research and Development Institute for Oil and Oil Products Transportation (Transneft R&D, LLC) for facilitating the innovation exchange and raising the professional level of national and foreign experts engaged in oil and petroleum products pipeline transportation.


Travel and Weather Can you make some horaire for train or transportation (Bejaia, Skikda, Tebessa, Annaba, ...) to ChlefAll the directions will coming soon on the final programme. Weather December in Chlef is cloudy and/or sometimes running. The average daily temperature is about 18°C, with lows of around 10°C. It is an ideal time for tourists to enjoy the beautiful sites of Chlef.

Recommended Hotels The reception and others accommodation will be in the WANCHARIS HOTEL (single room: 2500 DA, double room: 3500 DA and Triple room: 4500DA).


Technical Program

The SSENAM’2 symposium will be take place at the Central Bibliotheque on the Hassiba benbouali university of chlef (Hay Salem, route nationale N° 19).

Tuesday 12Decembre

Wenesday 13

Decembre

Thursday 14

Decembre

8 :00-8 :30

—

Registration 8 :30-9 :00 Keynote Solid Session


8 :30-9 :10 Opening Ceremony

9 :00-9 :00 Oral



9:10-10 :00 Plenary Lectures

10:00-10 :25 Coffee Break 10:00-10 : 30 Coffee Break

10 :25-10 :45

Reception of International Deleguation

Keynote Solid Session


10 : 30-12 : 45


10 :45-12 :45 Oral



12 :45-14 :00 Lunch Time 12 :45-14 :00 Lunch Time

14 :00-15 :30



14 :00-15 :30

Oral Presentation

Solid Session

15 :30 -16 : 00 Coffee Break 15 :30-16 :00 Coffee Break 16 :00 - 17 :00 Poster Presentation

19 :00 Round Table at hotel El-Wanchatissi

List of the Plenary Lectures, Oral and Poster Presentations


SSENAM'2 Name/First Name University

Plenary Lectures

Cln. Boualem METTAI L'Institut National de Criminalistique et de Criminologie de la Gendarmerie Nationale. Ing. Boualem MOKHANEG La Station Régionale de la protection des Végétaux de Chlef. Dr. AzedineBelalia LME, HassibaBenbouali University of Chlef, Algeria.

Oral Presentation Solid Session Mohammed El SallahZagane LMPM, Department of Mechanical Engineering, University of SidiBel Abbes, Algeria. D. SaidLhadj ENSH , MVRE Laboratory, BLIDA Algeria A. BRAHAMI University of DjilaliLiabes, Algeria. GOUMGHAR Amirouche University of Tizi-Ouzou, Algeria Abdeldjalil BENFOUGHAL Laboratoire de Génie Chimique (LGC), Blida, Algeria. TassaditCherfi University of MouloudMammeri, Tiziouzou, Algeria Bouhamidi Y Controls, Testing, Measurement and Simulation Mechanical laboratory, Chlef, Algeria LemyaHanifiHachemi Amar University, of Saïda, Algeria Habibi Samir University, of Mascara, Algeria HachellafKaddour Laboratoire LSTE, Université Mustapha Stambouli de Mascara, Algérie Y. Chahraoui University of Sidi-Bel Abbes, Algeria R.Mahdjoubi Université Badji Mokhtar, Annaba, B.P. 12, Algerie N. Si Ziani Université Mustapha Stambouli, Mascara, Algerie F.MESSAOUD University of Tlemcen,1300Tlemcen ,Algeria T. Bousnane University SidiBel Abbes, 22000, Algérie H. Fourn University of SidiBel Abbes, Algeria Fouad.Bourada University Center BelhadjBouchaib of AinTemouchent, Algeria N. Ouafek Research Center in Industrial Technologies CRTI, Cheraga,Algiers, Algeria A. Taghezout University of Mascara, Algeria K. Benyahi University of Tizi-Ouzou,UMMTO, BP 17 RP15000, Tizi-Ouzou, Algeria M. Foukrach Mechanical faculty of Engineering, USTO-MB 1505 EL M’naouar, Oran,Algeria Mama Ahouel Laboratory of materials and hydrology, Sidi-Bel-Abbes, Algeria A. Benaissa University, of DjillaliLiabes, Department of Civil Engineering, Fac.Technology A.Remadna NMISSI Laboratory, Mohamed Khider-Biskra University, Algeria L. Deghoul Tizi-Ouzou, Algeria Nebab Mokhtar University of Chlef, Algeria N. Mahmoudi Laboratoire Génie Industriel et Développement Durable, Relizane F. MESSAOUD Université de Tlemcen, Algeria A. Zerrouki University of SidiBel Abbes 22000, Algeria N. Deghoul University of Oran, Algérie

Poster Presentation Solid Session KLOUCHE Faiza University of Mostaganem, Algeria Z. Mentouri University of, Guelma, Algeria Y. Chahraoui University of SidiBel Abbes, Algeria A .Deliou University of SidiBelabbes, Algeria Ahmed Bakora University of SidiBelAbes Algeria Zine Abdallah, Centre Universitaire Ahmed ZabanaRelizane, Algeria K. Gherfi Research Center in Industrial Technologies, Algeria A, Deliou Université of Sidi Belabbes, Algérie K.RAKRAK Unisversity of Tiaret, Algeria

B. Hamadi University of Annaba, Algeria H. Khellafi University of Mascara Algeria Ammar BOULAL University of Tiaret, Algérie Abualnour University of Mustapha Stambouli à Mascara,Algeria.


A. Mouffoki University of SidiBel Abbes, Algeria

Hafida Driz Laboratoire (LMH) Materiaux et Hydrologie, Université de Sidi Bel Abbes, Algeria S. Nechad University of Chlef, Algeria Mustapha KAID UniversityodSidiBel Abbes, ALGERIA A OUZERIAT University Mouloud MAMMERI of Tizi-Ouzou, BP 17RP. Algeria. A. Alioua University of Tizi-Ouzou,Algeria. M. Benchohra University of SidiBel Abbes, Algeria M. BEDROUNI Center Salhi Ahmed of Naâma, Algeria. Hamidi Ahmed University of Bechar, Alger M. Braikia University, HassibaBenBouali of Chlef, Algeria. MayasSaeed University of Chlef, Algeria S. Chaib University of Constantine, Algeria O. Cheref University of SidiBel-Abbe, Algeria F. Khelil University Mustapha Stambouli, Mascara, Algeria L. Madouni University Mouloud MAMMERI of Tizi-Ouzou, Algeria Youcef Bouhamidi University of Chlef, Algeria AdelBoudiaf University of Sciences and Technology, Oran, Algeria Hamamousse K, University of Sciences and Technology, Oran, Algeria. Taleb Ouahiba Laboratoire des Matériaux et Hydrologie, University of de Sidi Bel Abbes, Algeria. Hafida Driz University of SidiBel Abbes, Algeria F. Benaoum LPQ3M laboratory, University Mustapha Stambouli, Mascara, Algeria. A. BELAZIZ Université Sidi Bel Abbés, Algérie. A. BELAZIZ Université Sidi Bel Abbés, Algérie

Oral PresentationFluid session D. SaidLhadj National High School for Hydraulics ( ENSH) ,MVRE Laboratory,BLIDAAlgerie M. Mechalikh University of HassibaBenboualiChlef. Algeria G. Habbar University of HassibaBenboualiChlef. Algeria. C. Bensalem University of HassibaBenboualiChlef. Algeria Houari Ameur Department of Technology, Institute of Science and Technology, Naâma, Algeria LaidoudiHoussem University of Oran ,Algeria M. Bouamama University of SidiBel Abbes Algeria S. MOKRANE, University, DjillaliLiabes de Sidi Bel-Abbes, Algeria Abderrahmane AISSA University of Mascara, ,Algeria. F. Bouregba Laboratoire-Hydrodynamique Naval (LAHN) USTO MB, USTO, Oran Algeria Z. Harchouche University of Sidi-Bel-Abbes, Algeria K. Nechab University of Chlef, Algeria A.Maizia University of Chlef, Algeria Y.KAMLA University of Chlef, Algeria Mohamed Amine MEDEBBER Université de Mostaganem, Algeria Ali Benouis University of Saida, Algeria BENABBOUN Radjaa University, of DjillaliLiabes , Algeria M. BEZZERROUKI UniversityDjilaliLiabes de Sidi-Bel-Abbès, Algeria K. AIMENE Université Mouloud MAMMERI de Tizi-Ouzou, Algérie A.Bensari University, Sidi Belabbes, Algérie W. Bensmain University of SidiBel Abbes, Algeria Ahmed BOUKHARI University of SidiBel Abbes, Algérie I. Ait Sidhoum University of Sciences and Technologie d'ORAN , Algérie HOUARI TAREK University of Mascara, Algérie S. LIAMANI Université of Sidi Bel Abbes, Algérie Mohamed MEDANI Université of Tiaret, Algeria ZAOUI Fatima Zohra Laboratoire de Modélisation Numérique et Expérimentale des Phénomènes

Mécaniques (LMNEPM), Université Abdelhamid Ibn-Badis, Mostaganem, Algeria Habibi Samir University, of, Mascara, Algeria N. Mahmoudi Laboratoire Génie Industriel et Développement Durable, Universitaire Relizane Bassam Gamal Nasser MUTHANNA LRM,University of Chlef, Esalem City, 02000, Chlef, Algeria


Contact e-mail: [email protected] https://www.Univ-chlef.dz/lptpm https://www.facebook.com/uhbc.dzTél: (+213) 27 72 17 94 Mobile: (+213) 7 70709563 Fax: +213 27 72 17 94

SOUDANI Mohamed LPTPM, University BenBouali of Chlef O. Bouledroua LPTPM, University BenBouali of Chlef Belkacem Amine KESSAL LPTPM, University BenBouali of Chlef

Poster presentationSession 2: Fluid mechanics Sofiane Bolkroune Research Center in Industrial Technologies CRTI, Algeria Z.Benhalima University of Mascara, Algeria R. Dehane SONATRACH/GL1Z,New Projects Department, Arzew,Algeria FARES Redouane University of Sciences et de la Technologie - Oran, Algeria S. Dahamni University of chlef, chlef Algeria AbdEllatifAmor University of chlef, chlef Algeria B. Elmossouess University of ORAN, Algeria A .Chemi Université de Sidi Bel Abbés, Algerie Amina ABDI Université de Moustafa ben Boulaid-Batna, Algeria M. Foukrach USTO-MB 1505 EL M’naouar, Oran,Algeria

SSEN AM '2 Chlef, December 13-14, 2017

28 University Hassiba benbouali of Chlef www.univ-chlef.dz/

Abstracts Oral and Poster presentations

Hydrogen Embrittlement Effect on Structural Assessment Integrity of API 5L X52 Pipeline Steel

O. Bouledroua1,,M.HadjMeliani1,2, G. Pluvinage2

1LPTPM, HassibaBenBouali University of Chlef, 02000 Chlef, Algeria. 2LaBPS-ENIMI, Paul Verlaine University of Metz, Ile de Saulcy, 57045 Metz, France.

* Contact person: [email protected]

Abstract:Hydrogen play a decisive role in many future energy systems. For these reasons, many re-searchers have been performed to see the effect of hydrogen on natural gas network. This paper was study the possibility of hydrogen transportation using the natural gas pipeline. We will take into account the effect of hydrogen on the safety of pipeline, in the view-points; the effect of hydrogen on mechanicals properties (stress-strain curve and material’s fracture toughness). These works concern the hydrogen permeation mechanism through a steel pipe’s wall and the influence of gaseous hydrogen under internal pressure in notched pipe. The presence of these cracks may lead to the pipeline failure and leakage. This ten-dency towards auto-ignition of leaks, combined with the difficulty in seeing the flame, make small leaks of hydrogen a potential risk of explosions. We will calculate failure pres-sure establish by different codes (ASME B31G, Modified B31G, DNV RP F-101, SHELL-92, RSTRENG, the Netto method and the Choi’s) compared with the crack driving force (CDF) and the Failure Assessment Diagram (FAD) approaches.

Keywords:Integrity of structure, Hydrogen Embrittlement, FAD, CDF, Critical pressure codes, Semi-elliptical crack, FEM.

Numerical study of semi-elliptical crack of API X70 pipeline

BassamGamal Nasser MUTHANNA1 , Madjid MERIEM-BENZIANE1, Ibrahim GADI1 1LRM,University of Chlef, Esalem City, 02000, Chlef, Algeria.

Abstract: The objective of this study is to compare the performance of the repaired and unrepaired

semi-elliptical cracks in elbow of API X70 pipeline steel under two different conditions: with patch and without patch. Through the position of crack tip, pressures and thicknesses the 3D finite element method (FEM) used to determinate of the stress intensity factors (KI) at the crack tip. Repairing cracks under internal pressure using carbon-epoxy composites was ana-lyzed in order to show the positive influence of the composite patch and adhesive on the piping system.

Keywords: API X70 pipeline, Stress Intensity Factor (SIF), Finite Element Method (FEM), Patch.

Influence of Fiber Orientation on the Behavior of Composite Pipes Subject to Internal Pres-sures

D. Said Lhadj1,*, R. Benzidane2 , B.Salah1 1 National High School for Hydraulics ( ENSH) , MVRE Laboratory, BLIDA Algerie .

2USTOMB ,LSCMI Laboratory, Oran, Algérie. Abstract: In the field of engineering the matrices reinforced by synthetic fibers have become widely

used in view of the high specific stiffness and resistance they offer. The main objective of this work is to simulate and analyze the mechanical behavior of a multilayer composite pipe for different fiber orientation angle. A finite element numerical model (MEF) under ANSYS has been developed to determine the displacement fields for a multilayer pipe un-der internal pressure. Subsequently, a parametric study was carried out to enhance the ef-fect of the mechanical and geometrical characteristics of the materials constituting the multi-layer pipe. From the results obtained, it was found that the displacement fields are clearly influenced by the orientations of the composite layers.

Keywords: Multilayer Composite Pipe, Mef, Internal Pressure, Constraint, Layers.

Modeling and simulation of the water hammer phenomenon in drinking water networks

D. Said Lhadj1,*, B.Salah1 1 National High School for Hydraulics ( ENSH) , MVRE Laboratory, BLIDA Algerie .

Abstract:The objective of our present work is the study of a transient phenomenon, specifically water

hammer, which manifests itself in drinking water pipelines when they are commissioned. we wanted to know the behavior of our pipes with respect to phoneme thus the influence of the nature of the materials on the shock wave absorption. The simulation will be performed by the AFT impulse software based on the characteristics method. The results thus obtained show that the overpressures and depressions obtained are less intense for the case of poly-ethylene pipes. This work is of primary interest for the engineers because the good estimate of the value of the water hammer will allow us to opt for the most adequate means of pro-tection.

Keywords: water hammer phenomenon, drinking water pipelines, the shock wave,overpressures and

depressions,the method of the characteristics.

Experimental study of exfoliation corrosion-induced mechanical properties degradation of alu-minum alloys

A. BRAHAMI1*, B. BOUCHOUICHA2,, J. FAJOUI3

1,2University of Djilali Liabes, BP89 Larbi Ben M’Hidi 2200, Sidi Bel Abbes, Algeria. 3IUT of Saint-Nazaire, 58 Rue Michel Ange 46000, Nantes, France.

Abstract: The objective of the present work were to study the influence of exfoliation corrosion

(EFC) of 2024 and 5083 aluminum alloys on the mechanical properties degradation. Ten-sile test had been carried out on pre-corroded specimens, exposed to laboratory accelerated exfoliation corrosion solution. The analysis suggests that exfoliation exposure leads to a decrease of mechanical properties of all materials. The effects of the grain boundary cha-racter distribution and precipitates on corrosion are discussed on the basis of experimental observations by SEM.

Keywords: aluminum alloys, mechanical properties, microstructure, exfoliation corrosion, precipita-tion, SEM. Experimental And Numerical Simulation of The Deformation Mode And Energy Absorption Of

Aluminum Alloy Tubing Under Uniaxial Collapse.

GOUMGHAR.Amirouche*,ZEROUKI.Marzak1, OULD OUALI Mohand1,Ouzeriat Ali1 1Laboratory of Elaboration and Characterization of Materials and Modeling, University of Tizi-

Ouzou, Algeria *[email protected] Abstract:Thispaper presents an experimental study of the behavior and the energy absorption of thin-

walled aluminum alloy tubes under quasi-static axial crush load. In this regard, specimens were fabricated, the axial collapse tests were performed at different range of strain rate to assess the energy absorption capacity and deformation mode results against crush load. Than a numerical model with Abaqus software was proposed to simulate the behavior of the tubes. The numerical and experimental results were in good agreement.

Keywords: Energy absorption; Quasi-static regime; Deformation mode; Aluminum tubes; Abaqus.

Influence of normal load on the tribological and thermal behaviors of copper- fiber glass composite

AbdeldjalilBENFOUGHALa, b,NaciraSASSANEa, Latifa ALIMIaNoureddineBOUGHDIRa,

NihelHAMZAOUIa a Research Center in Industrial Technology (CRTI), P.O.Box 64 Cheraga 16014.Algiers, Algeria.

bFaculty of Technology, Mechanics Laboratory Campus Chaâbat- Erssas, Brothers Mentouri Univer-sity, Constantine, Algeria.

([email protected]) Abstract:The tribological couple of a strip contact in a contact strip rubbing for copper-fiber glass

composite is studied as a function of applied load and test time. Experimental tests are rea-lized with tribometer pin-disc in atmosphere and dry sliding contact under the conditions of normal loads of 5-30 N and sliding speed of 1 m/s. 30 minutes is duration of each test. Scanning electron microscopy (SEM) and Energy dispersive X-ray (EDS) were used to ob-serve the topography of the tribo-surfaces and the changes in surface chemistry. These re-sults show that, normal load have more or less significant influence on tribological beha-vior of couple.

Keywords: Friction, Contact temperature, wear and Load. Simulation of the temperature variation in a solid material in the absence and in the presence of

the defect

S. Boulkroune1, A. Boudiaf2, M. Chaour3 , M. Bourebia4 Research Center in Industrial Technologies CRTI

Address P.O. Box 64, Cheraga 16014 Algiers, ALGERIA Abstract: The objective of this work is the detection of defects in different materials using the heat

equation. Our main study is the simulation of temperature variation in a solid material in the absence and presence of the defect using Fortran language, including a fracture at the surface of material, and see how the default influences on the transfer heat. The governing equations are the continuity equation, the Navier-Stock equations and the energy equation. These equations are discretized by the finite volume method on an offset mesh and the SIMPLE algorithm has been used for the processing of the velocity-pressure coupling.

Keywords: defect, finite volume method, materials

Analyse de flambement des plaques isotropes

F.KLOUCHE 1, A. SAHRAOUI 2, L. HANIFI HACHEMI AMAR3 ,A.TOUNSI4 1Laboratoire de Construction Transport et Protection de l'Environnement ( LCTPE), Université Ab-

delhamid Ibn Badis de Mostaganem, BP 188/227 Mostaganem 27000,Algérie [email protected]

2Laboratoire Mécanique des Structures (LMS), Université Tahri Mohamed de Béchar,BP 417 Route Kenadsa 08000 Béchar, Algérie

3 Laboratoire des Ressources Hydriques et Environnement, Université Dr Tahar Moulay de Saida, BP 138 Cité Nasr 20000 Saïda, Algérie

4 Laboratoire des Matériaux et Hydrologie (LMH), Université DjillaliLiabès de Sidi Bel Abbès, BP 89 Cité Ben Mhidi 22000 Sidi Bel Abbès, Algérie

Abstract:In this work, an exponential theory of shear deformation is developed for the buckling anal-

ysis of thick isotropic plates. This theory requires only one variable, unlike other higher or-der theories, which use a large number of variables. The present theory considers a non-linear distribution of transverse shear deformations across the thickness and satisfies the conditions of zero tangential stress at the upper and lower surfaces of the plate, without in-troducing the shear correction coefficients. The equilibrium equations of the present theory are obtained using the virtual working principle. Thick isotropic square plates are consi-dered in the numerical study. Analytical solutions for the buckling analysis of the square

plates are obtained. The results determined from the present theory are validated and com-pared with other known theories of the literature.

Keywords:Shear deformation, isotropic plates, shear correction factor, buckling analysis, critical buckling load.

Theoretical study of structural and electronic properties of AlxTl1-xP ternary alloys

R. BELACEL1, , M. MERABET2, F. ZAMI3

1 ,2 Laboratoire des Matériaux Magnétiques, Faculté des Sciences, Université DjillaliLiabes de Sidi

Bel-Abbes 22000 Algérie. 2 University of Tissemsilt, Institute of Science and Technology 38000, Algeria.

3Laboratoire de la matière condensée et de développement durable, Faculté des Sciences, Université Djilali Liabes de Sidi Bel-Abbes, 22000, Algérie.

Abstract: We have investigated the structural and electronic properties of AlxTl1-xP ternary alloy for

specific cases of x=0.25, 0.5, 0.75 by using first principles with full potential linear muffin-tin orbital (FP-LMTO) method, in the framework of the density functional theory (DFT) within the local density approximation (LDA). The ground-state properties are determined in the cubic Zincblende-phase (ZB). Calculation of the electronic properties of our ternary alloy shows that such type of material has a direct band gap. It should be noted that the band gap energy between the valance band maximum and the conduction band minimum is wider with the increase in Al-concentration (x). For composition x<0.25 the band gap ener-gy remains positive and is approximately equal to zero, so the material is semimetal.

Keywords: DFT, First-principles, FP-LMTO, LDA, Ternary alloy, Zincblende (ZnS).

Pressure Loss Analysis for Flow within a Curved-Wall Convergent

M. Mechalikh1, A. Benhamou2,P.Maspeyrot3 1Hassiba Benbouali University, Dpt of Mechanical Engineering, Hay Essalem, Chlef, Algeria

2LCEMSM Laboratory, Hay EsalemChlef, 02000,Algeria. 3PPRIME Institute, Mechanical Engineering and Complex Systems Department

01 CelementAderAvenue,Potiers, France Abstract: In a technological context related to dimensional metrology components for fluids and in-

ternal flow characterization techniques, the design of the convergent geometries is consid-ered as a decisive step before any construction project. Indeed, the contractions located in the upstream zones of the working sections, are often subjected to unstable flows, inducing thereby pressure losses, which can affect the quality of the measurements [1]. In the aim to reduce pressure losses within internal flows, ducts designers are committed to avoid sudden contractions, without thereby altering the overall dimensions, on which flow rates were prescribed. In this context, one proposes a methodology that consists of using various pro-files for a convergent, keeping inlet and outlet diameters, as well as overall lengths con-stant. These profiles are used in various application areas including subsonic flows in wind tunnels (aerodynamics), nozzle supersonic flows (propulsion) and acoustics application for speech synthesis (biomechanics) [2,3,4]. The profiles belong to three classes of curves, ranging from polynomial forms – so-called Mehta profiles- to Error function profiles – so-called Emanuel profiles- as well as the cubic functions – so-called Grandchamps profiles - Each family of curves has its own parameters that allow generating several profiles with various convexities. The application case consists of an experimental bench, featuring a convergent and a cylindrical duct through which an incompressible fluid in laminar flows [4]. The present work is an attempt towards the reproducibility of the flow dynamics in a curved convergent, whose dimensions (length, inlet and outlet diameters) are identical with those of the experimental device. The flow characterization consists on a numerical predic-tion of the velocity profile on centreline, which yields to the pressure losses across the con-vergent, while providing the radial velocity distribution at the throat section. A parametric analysis using several types of profiles is performed in the aim of bringing out the form that

ensures a minimum pressure loss as well as a maximum uniformity index on the throat. The calculations in isothermal laminar regime (without temperature transport) will be nu-

merically performed using the Ansys-Fluent® solver, in which the continuity and momen-tum equations are solved using a finite volumes method. The analysis reveals the existence of an antagonism between the convergent flatness at the outlet wall and its curvature in the throat upstream region. Moreover, the calculations confirm that the Error function profile, with a flatness parameter l = 2, allows for the best dynamic uniformity at the throat, while it generates the highest rate of pressure losses.

Keywords: internal flow, convergent profile, pressure loss, dynamic uniformity

Influence of the variability of cyclic properties for fatigue behavior

T. KEBIR1 , M. BENGUEDIAB

1Uinversity of DjilalliLiabès of SidiBelAbbès, Faculty of Technology, Mechanical engineeringDe-partment, Laboratory of Materials and Reactive Systems, Algeria.

Abstract:The knowledge for fatigue resistance is necessary for all material subjected to cyclic load-

ings.The theoretical life of a structure determined from Morrow or Smith-Watson-Topper (SWT) type fatigue criterion using the ANSYS code.The understanding of the cyclic prop-erties is essential to know the fatigue behavior.The values of these properties are varied and depend on the experimental conditions.In this work, the influence of the variability of the cyclic properties on the fatigue behavior forAA 2024-T3 is studied.

Key words: Fatigue, Morrow, SWT, variability, AA 2024-T3, cyclic properties, ANSYS.

Identification Approaches for Steel Strip Surface defects in Hot Rolling Process

Z. Mentouri1,2 , A. Moussaoui3, D. Boudjehem1, A. Boudiaf2, S. Ziani2

1Laboratory of Advanced Control (LABCAV),University of May 8th 1945, Guelma, Algeria 2Research Center in Industrial Technologies (CRTI), BP64, Chéraga 16014, Algiers, Algeria

3Laboratory of Electrical Engineering (LGEG), University of May 8th 1945, Guelma, Algeria Abstract :In steel manufacturing process, flat products are greatly concerned with the surface quality

and the possibilities of its on-line inspection. The visual control is obviously unable to con-tinuously check the surface of the moving product, and the control at the ending stage re-mains not suitable although, it may provide information about process trends and parame-ters history. So, strip surface defects that are not detected yield to product downgrading or to costly rework operations for producer and/or end users. With such needed quality level, steel surface inspection systems are more and more implemented for detecting defects and allowing correction at appropriate time. Based on Computer vision, these applications make a use of detection and classification algorithms to identify these arising defects. The present work is related to a Project of a scientific and economic impact : The Development of an on-line inspection system for strip surface defects identification during the thermo-mechanical treatment in hot rolling process. We asses, in this work, some approaches in labeling each of the defects belonging to a database created for this aim. This Dataset is compound of five, among the most frequent, surface defect types and with 108 variants of each one. Obtained results shown the importance of the choice of a relevant image features extractor.

Keywords:Computer vision, Detection & Classification, Rolling process, Quality & Surface defects,

Finite Element Computed of Frictional Contact Model of an Elastic Sphere

Under Combined Normal and Tangential Loading

A. OUZERIAT1*, M. Ould Ouali1, M. Zerouki1, A.Goumghar1 1University Mouloud MAMMERI of Tizi-Ouzou, BP 17RP. Algeria.

Abstract: The Contact between two surfaces with normal and tangential force involve friction dissi-

pa-tion phenomenon. The friction phenomenon can be formulated as a constitutive re-lation in a similar form to that of the elasto-plastic constitutive equation of materials, the present paper studies of sliding and slip rules of elastic frictional contact by using the formalism of plasticity, for regularized passage from stick to sliding in contact of solids. It purpose is to present new approach for regularized constitutive model for interface con-tact elastic with friction, this model is implemented in finite element code ABAQUS by us-er subroutine Vfric.

Keywords:slip rules, frictional contact, sub-loading friction model, slip rules, multi-surface plasticity

Ab-initio study of electrical and thermal transport properties of single filled of ternary Skutte-

rudites

Z.Benhalima1a, A.Bekhti-Siad2, H.Bouhani-Benziane1, O.Sahnoun1, N.Si Ziani1 and M.Sahnoun1 1Laboratoire de Physique Quantique de la Matière et Modélisation Mathematique (LPQ3M), Faculté

des Sciences Exactes, University of Mascara, Algeria 2 Laboratoire de Matériaux Applications et Environnement (LMAE), Faculté des Sciences Exactes,

University of Mascara, Algeria E-mail : [email protected]

Abstract : Skutterudite is a popular group of thermoelectric materials (TEM) because they show low

thermal conductivity with filled voids in their structure. To investigate the potential of ter-nary Skutterudite as TEM; first principles calculations are performed on filled CoGe1.5Se1.5, Yb and Fe are used as void filler and substitution in Co sites. Calculations have been made using full potential linearized augmented plane wave (FP-LAPW) method within the framework of density functional theory (DFT). For exchange-correlation energy and cor-responding potential, generalized gradient approximation (GGA) by Perdew–Burke–Ernzerhof (PBE) has been used. Our calculations shows that the YbyFexCo1-xGe1.5Se1.5 is a semiconductor with small gap. Also an ab-initio calculations combined with classical Boltzmann transport equation under constant relaxation time approximation have been used to study electrical transport properties of the material. We found that YbyFexCo1-xGe1.5Se1.5 has large seebeck coefficient and low thermal conductivity.

Keywords: Thermoelectric materials (TEM), Ternary Skutterudite, Seebeck coefficient and Thermal conductivity.

FIRE ANALYSIS OF AN OPEN CAR PARK BUILDING STRUCTURE

G. Habbar1,, P. Piloto2,A.Benarous3

1University HassibaBenbouali,Mechanical Engineering Dpt, Esalem City, 02000, Chlef, Algeria. 2Polytechnic Institute of Bragança. Campus de Santa Apolónia, 5300-253. Bragança. Portugal.

3 LCEMSM Laboratory, Esalem City, 02000, Chlef, Algeria. Abstract: The aim of this work is to determine the thermal behaviour of an open car park building

structure, using the fire event of a car. Temperature evolution of part of the element of the structure should also be compared with the simplified model of EN1991-1-2 (Heskestad and Hasemi method) to determine the thermal behaviour of the structure. The thermal load-ing of an open car building structure will be analysed, based on different fire scenarios that depend on the number of fire events (HRR & time). The compartment is going to be fixed and few parameters should be identified to do a parametric analysis. An advanced calcula-tion method (using FLUENT® software) will be used to determine several temperature-time

curves, based on the CFD analysis and in the thermal effect of the fluid from the localized fire.

Keywords: Ansys Fluent; Composite steel; Concrete structure; Elefir-EN software; Localized Fire; Open car park; Thermal behaviour.

Simulation of a Non-Premixed Flame using the Open Foam Solver

C. Bensalem 1, M. Alliche3, A. Benarous 1LCEMSM Laboratory, Esalem City, 02000, Chlef, Algeria.

2Department of Mechanical Engineering,HassibaBenbouali University, Esalem City, 02000, Chlef, Algeria

3Department of Mechanical Engineering, DrYahiaFarès University, AinEDhab City, 26000, Medea, Algeria

Abstract: Computational Fluid Dynamics (CFD) has the potential to enhance the design and devel-

opment process in different areas by replacing empiricism in the legacy design tools with higher fidelity physics based approach. A significant use of a validated CFD tool is seemed to boost the initial design process by including relevant physical models. It can be further used as guidance for definition and execution of the subscale test campaign reducing the uncertainty of scaling subscale test data to the full scale design. Otherwise CFD models can be used to interpret and understand data when dealing with experimental rebuilding. This paper documents the status of an effort to understand the predictive capabilities and resource requirements of the OpenFoam® solver on a typical burner design problem, in-volving reacting flows. The burner in study includes combustion chamber, as target case, in which methane is in-jected at the center and air around the periphery. The case is numerically analyzed with OpenFoam®, reproducing mixing and combustion processes.

Keywords: Combustion, Non-pemixed flame, OpenFoam, Cylindrical-Burner.

Modeling the cyclic behavior of concrete

A. Alioua1,, T. Messafer2, M.S. Kachi1 1Department of Civil Engineering, MouloudMammeri University of Tizi-Ouzou, Algeria. 2Department of Civil Engineering, M’hamedBougara University of Boumerdes, Algeria.

Abstract: A model of cyclic nonlinear behavior of concrete is developed based on experimental ob-

servations of the existing tests in literature, this model takes into account the various ob-served phenomena namely: the degradation of the rigidity from one cycle to another, the degradation of its resistance, the appearance of residual deformations as well as the reclose of cracks during loading cycles.This model was integrated in a computer program written in FORTRAN 90 which allows the numerical simulation of reinforced concrete planar structures, several examples extracted from literature were tested using the program in or-der to validate the developed model, the comparison of the obtained results with experi-mental results is very satisfactory.

Keywords:cyclic loading, concrete, nonlinear behavior.

Study of the effect of the concepts of mechanics of rupture on the damage of materials welded

on X70

A .Deliou1,2, B. Bouchouicha2, k. Belkaid2

1 University of SidiBelabbes LMSR, ,SidiBelabbes; Algeria. 2Research Center in Industrial Technologies CRTI, P.O.Box 64, Cheraga, Algeria

Abstract: The defects which generate cracking generally produce in the joints of welding and the

question of safety for this type of structures, thus makes essential the study of the rupture of these junctions. The notions of mechanics of rupture are used to analyze the harmfulness of the welded defects in the construction industries. The objective of our work is to contribute a share to the study of the rupture of a joint welded in X70 in order to develop a method of analysis, adapted to this type of junction. For a better comprehension of the process leading to the ductile tear of the welded structures, we numerically checked two comprehensive approaches of the breaking process the integral J and the displacement of opening in face of crack CTOD.

Keywords: Joint welded; Integral J; CTOD; ductile rupture

Free vibration analysis of carbon nanotube-reinforced composite plates resting en elastic foun-dation

Ahmed Bakora1,*,Fouad Bourada1,Mamia Benchohra1,Mamia Ahouel1,Abdelouhed Tounsi1

1 Material and Hydrology Laboratory, University of SidiBel Abbes, Faculty of Technology, Civil En-gineering Department, Algeria ([email protected])

Abstract.In this work we investigate dynamic behavior of carbon nanotube-reinforced composite

(CNTRC) plates resting on the Pasternak elastic foundation including shear layer and Winkler springs. The plates are reinforced by single-walled carbon nanotubes with diffrent distributions of uni-axially aligned reinforcement material. Exact solutions obtained from closed-form formulation based on higher order shear deformation plat theory. An accuracy of the present solutions is validated numerically by comparisons with some available re-sults in the literature. Various significant parameters of carbon nanotube volume fraction, spring constant factors, plate thickness and aspect ratios, etc. are taken into investigation. According to the numerical results, it is revealed natural frequency increases as the incre-ment of the factors for every type of plate.

Keywords: Exact solution , Static and dynamic, CNTRC plate, Elastic foundation.

Caractérisation d’un cordon de soudure par FSW dans le cas des matériaux polymères

Hachellaf Kaddour1, Meddah H.Miloud1,Ould Chikh El Bahri1, Lounis Abdellah1 1Laboratoire LSTE, Université Mustapha Stambouli de Mascara,

Route de Mamounia , Mascara,29000,Algerie hachellafkaddour @yahoo.fr

Abstract: The purpose of our experimental work is to determine and characterize the optimum para-

meters of welding such as speed of feed, speed of rotation, effort of diving, etc. . .), applied to a polymeric material. To obtain a good weld, it is necessary to carry out a series of welds and make some mechanical tests. Experimental tests on FSW welding of polymers (HDPE) were carried out with different types of tools. Satisfactory results were obtained showing the influence of these parameters on the welding quality for the material used.

Keywords: FSW, polymers, law of behavior, FEM, Vickers hardness test.

A Comparative Study between Numerical Compressible Schemes: Application to Boundary

Layer Separation Prediction

R. Dehane1,2 , A. Benarous,, A. Liazid3 1 SONATRACH/GL1Z,New Projects Department, Arzew,Algeria

2 LCEMSM Laboratory, Essalem City, 02000, Chlef, Algeria. 3University AboubakrBelkaid, Faculty of Sciences, Po Box 119-13000, Tlemcen, Algeria

Abstract: In the aim to predict efficiently a boundary layer (BL) separation during an over-expanded

flow it seems important to tackle the apparition of the corresponding shock wave. Several computational fluid dynamics (CFD) solvers allow for a possibility for choices between one or two numerical schemes. The efficiency of each numerical scheme depends on the way of its application and is strongly related to the physics of the separation phenomenon. The purpose of this work is to study the veracity and the relevance of several schemes, namely the Lax-Friedrich, H3L, Rusanov, AUFS, Van-Leer, Steger-Warming, Roe, Zah-Bilgen. The study focuses on the conventional shock tube problem and illustrates the effi-ciency and leaks of each numerical scheme.

Keywords: shock tube, Euler equations, Riemann problem, boundary layer separation.

Contribution à l'étude de vibration des structures plaques en FGM sur fondations élastiques en utilisant une nouvelle fonction de cisaillement

Zine Abdallah 1,2,Mahmoudi Abdelkader2,Sekkal Mohamed3, Fahsi Bouazza3,

Benyoucef Samir2,Tounsi Abdeloauhed2,3 1Centre Universitaire Ahmed ZabanaRelizane,

2Laboratoire des Matériaux et Hydrologie,Université de Sidi Bel Abbes, BP 89 Cité Ben M’hidi 22000 Sidi Bel Abbes, Algérie.

3Laboratoire de Modélisation et Simulation Numérique

Résumé: Dans ce travail, la vibration libre des plaques fonctionnellement graduées (FGM) posées sur des fondations élastiques de type (Winkler-Pasternak) est étudiée en utilisant une nouvelle théorie hyperbolique de la déformation de cisaillement. La présente théorie satisfait exac-tement les conditions de la contrainte de cisaillement nulle aux bords libres de la plaque. Les propriétés matérielles varient d’une façon continue à travers l’épaisseur de la plaque selon une loi de puissance ou exponentielle. Les équations du mouvement pour des plaques rectangulaires fonctionnellement graduées posées sur des fondations élastiques sont obte-nues en utilisant le principe d’Hamilton. Les solutions analytiques sont déterminées en uti-lisant la technique du « Navier » et les fréquences fondamentales sont trouvées en résolvant le problème des valeurs propres. Les résultats sont comparés avec ceux de la littérature.

Mots clés : Plaques fonctionnellement graduées ; fondation élastique ; théorie d’ordre élevé ;vibration libre.

Etude Expérimentale et Numérique de l’effet de Chargement Uniaxiale sur le Comportement du Bourrelet (Joint de soudure) en PEHD

A. BELAZIZ 1, M. MAZARI2

1,2Université DjillaliLiabes, Laboratoire de Matériaux et Systèmes Réactifs LMSR, BP89 cité Larbi ben m’hidi, Sidi Bel Abbés, Algérie.

Résumé : Cette étude a été consacrée à l'étude expérimentale et simulation numériques du comporte-ment mécanique d’une structure en PEHD sollicitée en traction soudée par la technique bout à bout. Nous nous sommes basés sur des essais expérimentaux qui ont été effectués pour caractériser le matériau étudié et introduire la ductilité de la section soudée. Les résul-tats expérimentaux et numériques des éprouvettes soudées sont comparés à ceux corres-pondant au matériau de base.

Mots clés : Polyéthylène à haute densité, traction uniaxiale, comportement mécanique. Simulation numérique du retard de propagation des fissures d’une structure fissurée et réparée

A. BELAZIZ 1, M. MAZARI2

1,2Université DjillaliLiabes, Laboratoire de Matériaux et Systèmes Réactifs LMSR, BP89 cité Larbi ben m’hidi, Sidi Bel Abbés, Algérie.

Résumé : Diverses techniques de réparation de structures fissurées réalisées en matériaux, tel que perçage d’un trou avec expansion, renfort métallique sont de plus en plus efficaces pour comprendre les phénomènes d'arrêt ou de retard de la propagation de fissure dans les maté-riaux endommagés. Ces techniques sont considérées comme une solution prometteuse. La durée de vie en fatigue est donc tout naturellement décomposée en période d’amorçage et période de propagation. Pour des raisons pratiques, la propagation à l’échelle microsco-pique, c'est-à-dire la fissuration sur une longueur de quelques grains, est incluse dans la pé-riode d’amorçage.

Mots clés : Fissures, propagation, réparation, retard de propagation.

Ab initio calculations of the structural, electronic and thermoelectric properties of II_IV_V ter-nerychalcopyrit

N. Si Ziani1, H. Bouhani-Benziane1, M. Baira1, A E K. Belfedal2, M. Sahnoun1

1Laboratoire de Physique Quantique de la Matière et Modélisation Mathematique (LPQ3M), Faculté des Sciences Exactes, Université Mustapha Stambouli, Mascara.

2Laboratoire de Chimie-Physique de Macromolécule et interface Biologique, Faculté des Sciences et de la vie, Université Mustapha Stambouli, Mascara.

[email protected] Abstract: Electronic and thermoelectic properties of ternary chalcopyrite type CdSnAs2 were studied

using the first principles density functional calculations performed in the full potential li-near augmented plane wave (FP-LAPW) method as implemented in the WIEN2k code. The thermoelectric properties are calculated by solving the Boltzmann transport equation within the constant relaxation time approximation. The calculated band gap using the Tran-Blaha modified Becke- Johnson potential (TB-mBJ) of CdSnAs2 compound is in good agreement with the available experimental data. Thermoelectric properties like thermopower, elecricalcondictivity scaled by relaxation time are calculated as a fonction of carrier concentration at différent temperatures.

Keywords —Electronic properties, Thermoelectric properties, FP-LAPW method, TB-mBJ.

Contribution to the development of a new approach for calculating 3D manufacturing toler-ances

F.MESSAOUD 1, M. RAHOU 2 F. SEBAA3

1University of Tlemcen,1300 Tlemcen ,Algeria 2UESSA-Tlemcen,1300 Tlemcen ,Algeria

3University of Tlemcen,1300 Tlemcen ,Algeria Abstract: For the automotive and aerospace industries, the tolerancing process has become an impor-

tant issue for product design and manufacture. All the actors of the production of an indus-trial product need tools of computation and analysis for the modeling of the effects of toler-ance as well in terms of design as manufacturing. The study of the defects generated by the movements of the table in industrial cases, shows the difficulty and the interest of estimating them in order to take them into consideration at the time of the preparation of the preliminary draft of the manufacturing study. This work presents a contribution to the computation of geometric constraints of concentricity. An ex-perimental study allows the quantification of the geometrical defects due to the displace-ment of the table, for the determination of and the choice of an optimal isostatic position of the part. A 3D tolerancing approach, based on the small displacement torsor method, al-lows upstream determination of manufacturing errors. The measurement of these geome-trical defects allows the calculation of the deviations of rotation (alpha, beta, gamma) and translation (u, v, w). Finally, the 3DMaTol tool developed allows the automatic generation

of manufacturing tolerances for nominal dimensions along the three axes X, Y and Z. Keywords: Tolerance , 3D, Error, Manufarturing.

Finite element analysis of the cement behaviour of reconstructed acetabulum after load applica-tion

T. Bousnane, S.Benberak, A.Sahli

Département de génie mécanique, Université de Sidi Bel Abbes, BP 89, Cité Ben M'hidi, Sidi Bel Abbes, 22000, Algérie.

Correspondingauthor: [email protected] Abstract: Dans le processus de substitution de l’articulation de la hanche naturelle par une autre

artificielle (dite prothèse totale de hanche), l’adhérence se produit entre les parties naturelle et artificielle par du ciment chirurgical (PMMA). Le ciment orthopédique présente une structure poreuse, ce défaut détériore les propriétés mécaniques, du fait qu’autour de ces pores la contrainte augmente et ces pores sont le siège d’initiation de fissure. Les résultats montrent que la présence de micro défaut dans le ciment orthopédique augmente significa-tivement la contrainte autour de celui-ci.

Keywords: prothèse totale de hanche, ciment chirurgical (PMMA), pores.

Analysis of the porosity effect of functionally graded beams (FGM) in vibrational Sollicitations

H. Fourn1, R. Bennai 2, B. Ayache 1, H. AIT Atmane1, 2,

1Material and Hydrology Laboratory, University of SidiBel Abbes, Algeria 2Department of civil engineering, University of HassibaBenboualiChlef, Algeria

Abstract: A method based on high-order four-variable theory that introduces indeterminate integral

variables was using to study the free vibration of FGM beams. A constant distribution of porosity according to the thickness of the beam was retained, The modulus of elasticity and the mass density of this beam is assumed to vary according to the thickness of the beam according to this porosity distribution. The equilibrium equations are obtained using the Hamilton principle and the solution of the problem in terms of natural frequencies will be obtained through the Navier solution. Numerical results are presented and a parametric study will be detailed to underline the influence of the variation of the po-rosity on the vibratory response of the FGM beams resting on simple supports.

Keywords: FG beam; shear deformation theory; vibration; porosity.

A New HSDT Theory For Functionally Graded Plates

M. Benchohra1,, H.Driz1, A.H.Benchohra, M.Ahouel1, A. Bakora1,M.Bourada,A.Tounsi1 Material and Hydrology Laboratory, University of SidiBel Abbes, Faculty of Technology, Civil Engi-

neering Department, Algeria Abstract: In this paper, a new quasi-3D sinusoidal shear deformation theory for functionally graded

(FG) plates is proposed. The theory considers both shear deformation and thickness-stretching influences by a trigonometric distribution of all displacements within the thick-ness, and respects the stress-free boundary conditions on the upper and lower faces of the plate without employing any shear correction coefficient. The advantage of the proposed model is that it posses a smaller number of variables and governing equations than the ex-isting quasi-3D models, but its results compare well with those of 3D and quasi-3D theo-ries. This benefit is due to the use of undetermined integral unknowns in the displacement field of the present theory. By employing the Hamilton principle, equations of motion are obtained in the present formulation. Closed-form solutions for bending and free vibration problems are determined for simply supported plates. Numerical examples are proposed to check the accuracy of the developed theory.

Keywords:Quasi 3D theory; Bending; Vibration; Functionally graded plate.

Classification in an infrared image of material with defects

K. Gherfi1,2, Y. Laib dit Leksir3, H. Bendjama1, M. Tria1, D. Idiou1, L. Cherrad1 and R. Boulkroune1

1Research Center in Industrial Technologies (CRTI), BP 64 Cheraga, Algiers 16000, Algeria, [email protected], [email protected]

2Laboratoire Automatique et Signaux Annaba, Université Badji Mokhtar, BP 12 Annaba 23000, Alge-ria.

3Université Constantine 1, Route Ain El-bey, Constantine 25011, Algeria. Abstract: The metallurgical domain the base of several systems, the role of this field is to treat differ-

ent materials properties. Before using any materials it is necessary to ensure the good quali-ty of this material, i.e. the absence of the surface defects or intern in material, for detected defects we use several inspection methods, among these methods the infra-red thermogra-phy technique is present.In this study we present the difference between results of two clas-sification mathematics methods of defects such as the unsupervised method (ISODATA) and the supervised method (neural networks) based on the temperature variation profiles.

Keywords: Infrared image; material; Isodata; neural networks.

Propriétés structurales et optiques des couches minces de SnO2déposés par spin-coating

N. Ouafek1, 2, *, F. Boufelgha1, H. Dahdouh1 1Research Center in Industrial Technologies CRTI, P. O. Box 64 Cheraga 16014,Algiers, Algeria.

2microstructure and defaults in the materials laboratory, UniversityMentouri Constantine, Ain El Bey, 25000 Constantine, Algeria.

Abstract:Des couches minces d’oxyde d’étain (SnO2) ont été préparées par la méthode chimique sol-gel, et déposées par spin coating. Une caractérisation structurale été effectuée d’après des spectres de diffraction de rayons X (DRX), qui ont confirmé la formation des couches de SnO2 bien cristallisée dans la structure tétragonal rutile avec une maille élémentaire quadra-tique. Les propriétés optiques ont été étudiées à l’aide d’un UV visible, d’après ce dénier, les couches minces de SnO2 présentent une transmittance de entre 70 et 80 % et le gap op-tique est de l’ordre de 3.85 - 3.90 eV.

Keywords:Thin films, SnO2, XRD, Spin-Coating.

Analysis of the plane elasticity problem in a cracked medium by the extended finite element method XFEM

A. Taghezout1*, A. Aid1, M. Bendouba1 ,Hm.Madah2 , H.Khalafi2

1University of Mascara, LPQ3M. 2University of Mascara, LSTE.

Abstract: In this work a numerical modeling was realized to study the problem of plane elasticity in a

cracked medium by the method of the finite elements extended in a thin rectangular crack test in 2D of an aluminum alloy by using the software of Abaqus 6.13 calculation; based on variation in size and shape of crack.

the results obtained will be compared with those obtained experimentally by Gao Yi et al; a good match between the two values (numerical and experimental) was noted. Keywords: break; plane elasticity; Integral J; XFEM, stress intensity factor.

Prediction of the mechanical properties of a composite "concrete" by different methods of ho-

mogenization (semi-analytical and asymptotic method)

K. Benyahi1,, Y. Bouafia1, M.S. Kachi1, M. Tebani1 1University of Tizi-Ouzou, UMMTO, BP 17 RP 15000, Tizi-Ouzou, Algeria.

Abstract:The purpose of this study is to determine the mechanical characteristics by homogenization

methods; Firstly, it involves modeling using the semi-analytical method (Mori-Tanaka and Auto-coherent model), then applying the periodic homogenization method and in particu-lar, the asymptotic method for a representative volumeelement (RVE) of a composite "con-crete". This composite consists of a cement matrix (including fine sand) and inclusions (spherical, ellipsoidal) in aggregates or gravel. It is a question of comparing the effective properties as a function of the different volume fractions and forms inclusions of a "con-crete" composite (spherical and / or ellipsoidal inclusion matrix), and also to take into ac-count the influence of geometry and porosities at the macroscopic level. This modeling is implemented using the Matlab® environment.

We validate our modeling, comparing the results of our calculations with experimental results. The verifications carried out concerned representative volume element of a "concrete" composite.

Keywords: Homogenization, modeling, inclusion, concrete, modulus of elasticity, shear modulus.

Numerical Simulation of Flow Past a Circular Cylinder

M. BEDROUNI1, A. KHELIL1, K. LAZEREGUE1,M.BRAIKIA1, Y. BOUHAMIDI1, S.NECHAD1, A.BENNIA1

1University of Chlef, Laboratory of control, Testing, Measurement and Mechanical Simulation, B. P. 151, 2000 Chlef, Algeria

Abstract: Transitional flow past a three-dimensional circular cylinder is a widely studied phenome-

non since this problem is of interest with respect to many technical applications. In the present paper, the numerical simulation of flow past a circular cylinder is performed by us-ing a commercial CFD code (ANSYS Fluent) with large eddy simulation (LES) and , K− ε approaches. The flow is modeled based on the experimental studies of Zdravkovich, 1997.The numerical results extracted from these simulations have good agreement with the experimental data, and provide verification and best practices for the use of large eddy si-mulation in the investigation of the force coefficient, flow separation angle, pressure distri-bution on cylinder and the complex three dimensional vortex shedding of the cylinder wake region. The simulations are conducted for two Reynolds numbers of 1000 and 3900, both of which are in the sub-critical regime. The choice of the Reynolds numbers of simulation depends largely on the experimental data available.

Keywords: Transitional flow, Large eddy simulation, Circular cylinder, flow separation angle, Vortex shedding.

Faults detection of mechanical systems by vibratory analysis

Deliou 1,2, B. Bouchouicha1, K. Belkaid2,I.Atoui2, B.Oudjani2

1 University of SidiBelabbes LMSR, ,SidiBelabbes; Algeria. 2Research Center in Industrial Technologies CRTI, P.O.Box 64, Cheraga, Algeria

Abstract: The use of the various existing industrial plants requires a follow-up of behavior interesting

to ensure the safety, the quality of the production, the availability of the equipment, and the minimization of the costs of exploitation.

The vibratory analysis it is essential with any service of maintenance to guarantee an effec-tive monitoring of the revolving machines. Indeed, this method can give qualitative infor-mation on the lying efforts to the center on the machine parts and makes it possible to detect the early appearance of the defects thanks to this technique and to prevent stops of expensive products due to the unforeseen defect of a revolving element. In this work we seek to accommodate a reasonably detailed study on the diagnosis and detection of several defects in rotating machines and above all the bearing defects of our URMA / CRTI vibra-tion test stand by spectral analysis.

Keywords:, vibration analysis, Modes of detections, faults, bearings.

L’effet de la forme et l’emplacement des chicanes dans un système agité par une turbine de Rushton

M. Foukrach1, M. Bouzit1,,Y. Kamla2,A. Houari3

1Mechanical faculty of Engineering, USTO-MB 1505 EL M’naouar, Oran,Algeria 2University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria.

3Institute of Science and Technology, University Center Ahmed Salhi (CtrUnivNaâma), Algeria Résumé:L’agitation est d'une grande importance actuellement elle est largement utilisé pour opéra-

tions dans un large éventail d'industries, y compris chimiques, pharmaceutiques, alimen-taires et pétrolières. Ils sont utilisés pour le mélange liquide, le mélange solide-liquide, le gaz La dispersion dans les liquides, l'amélioration du transfert de chaleur / masse et réac-tion chimique.

Dans ce papier nous avons intéressés d’étudier une simulation numérique de l’écoulement des fluides Newtoniens dans une cuve chicanée mécaniquement agitée par une turbine de Rushton à six pales droites. On utilise des cuves chicanées qui ont une influence importante sur la taille des vortex. L’objet de cette travail est étudié l’influence de la forme des chi-canes et leurs emplacements sur les caractéristique hydrodynamique de l’écoulement. Le modèle de turbulence a été utilisée est le k-ε standard. Les équations de Navier-Stockes ont été discrétisés par la méthode des volumes finis.

Keywords: Agitation, turbine de Rushton, fluide Newtonien, cuve chicanée, nombre de puissance.

Non-Newtonian fluid flows through a backward facing step

Houari Ameur1,*, Djamel Sahel2, Youcef Kamla3 1Department of Technology, Institute of Science and Technology, University Center Salhi Ahmed of

Naâma (CtrUnivNaâma), P.B. 66, 45000, Algeria

2Department of Technical Sciences, University Amar Thilidji of Laghouat, Algeria 3Department of Science and Technology, Faculty of Technology, Unisversity Hassiba Ben Bouali of

Chlef, Algeria *Corresponding author. E-mail address: [email protected]; Tel.: +213770343722

Abstract:Turbulent flows through a backward facing step are discussed in this paper. The investiga-

tion is carried out by means of numerical simulation and using the calculation code Ansys-CFX 16.0. The simulated fluids are incompressible and have a non-Newtonian (shear thin-ning) behavior modeled by the Oswald's law. The basis of the numerical approach used is the finite volume method. In order to ensure an adequate prediction of the nature of the downstream flows, some results are compared with the experimental measurements and a good agreement is obtained. The study is made for different geometric configurations and for a range of Reynolds number ranging from 100 to 12,000.

Keywords:Turbulent flow; Backward facing step; Non-Newtonian fluid; Vortex size; Reattachment length.

Study of the mechanical stability of nano-beams in heterogeneous material

Mama Ahouel1, Fouad Bourada2,Fatima Zohra Zaoui3,Abdelouahed Tounsi1

1Laboratory of materials and hydrology, University of DjillaliLiabes, 22000, Sidi-Bel-Abbes, Algeria 2Civil Engineering Department, University Center of AinTemouchent, Algeria.

3Mechanical Engineering Department, UniversityAbdelhamidibnBadis of Mostaghanem, Algeria Abstract:A nonlocal trigonometric shear deformation beam theory based on neutral surface position

is developed for buckling of functionally graded (FG) nano-beams using the nonlocal diffe-rential constitutive relations of Eringen. The present model is capable of capturing both

small scale effect and transverse shear deformation effects of FG nano-beams, and does not require shear correction factors. The material properties of the FG nano-beam are assumed to vary in the thickness direction. The equations of the stability are derived by employing virtual works principle, and the physical neutral surface concept. Analytical solutions are presented for a simply supported FG nano-beam.

Keywords:Nano-beam; Non-local elasticity theory; Buckling; heterogeneous materials; Neutral sur-face position.

Numerical investigation of hydrodynamic nanofluid convective flow in a porous enclosure

FARES Redouane1, Abderrahmane AISSA2, A MEDDEBER 2, AID abdekrim2 1Université des Sciences et de la Technologie - Oran – Algérie, 2 (LPQ3M), Mustapha StambouliUniversityof Mascara, Algeria

*Corresponding author: [email protected] Abstract:In this study, the steady state behavior of natural convection transport on a nanofluid in

square enclosure was studied. The model equations were solved using ComsolMultiphys-ics; a solver for partial differential Navier–Stokes equations based on a two-dimensional Finite Element Method (FEM) over a range of Rayleigh numbers (102 –107). Impact of the Rayleigh Number, the Darcy Number, the porosity, the solid fractionvolume of porous me-dium and the nanoparticle concentration on natural convection are depicted. Obtained Re-sults reveal that convection mode increases with rise of Rayleigh number. Darcy number can enhance the rate of heat transfer. The simulated results were compared with other nu-merical data from the literature, which indicate that good agreement is founded.

Keywords: free convection, Hartmann number, volume fraction, Darcy number, Nusselt number

Treatment and Reuse of Dredged Sediments from the dam Fergoug in Road

Construction

A. Benaissa1, , Z. Aloui1, Daniel Levacher2

1University, of Djillali Liabes, Department of Civil Engineering, Fac.Technology, Labo. Civil Engineering & Environment (LGCE), Sidi Bel Abbes, Algeria

2Normandy University, Uni caen, Laboratoire M2C- France Abstract:The valorization of dredged sediments and their reuse in road construction field is a way

increasingly prospected by researchers these last years. In Algeria, the phenomenon of sil-tation affects all dams where more than 50 106 m3 of sediment are deposited annually. It was then necessary to develop rational reuses of the dredged sediments. This present takes part in a research methodology for management of dredged sediments in the western region of Algeria. The main objective is to provide formulations economically competitive and easy to implement in situ which allow recovery of these dredged materials in road engi-neering construction. Exploitation of dredging sediments from Fergoug dam (Algeria) and their valorization in road sublayers are reported here. A series of physical, chemical and mechanical tests on sediment samples taken from the reservoir of Fergoug dam (Mascara) are conducted. The influence of adding granular material and hydraulic binders as correct-ing both grain size and resistance is demonstrated. Improvement of geotechnical state pa-rameters, optimal characteristics of densification and bearing capacity mechanical strengths are analyzed. Different formulations are proposed for enhancement in road construction following recommendations of technical guides, as GTR and GTS.

Keywords:mud, sediments, valorization, Mechanical behaviour, Roads construction.

First-principles calculation of structural and volume thermal expansion of CuGaTe2 ternary

chalcopyrite solar cell materials

R.Mahdjoubi1,2,*, Y.Megdoud1, S.Cheddadi1, H.Meradji1, S.Ghemid1

1 Laboratoire LPR, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, 23000 Annaba, B.P. 12, Algerie.

2Laboratoire LESIMS, Département de Physique, Faculté des Sciences, Université Badji Mokhtar, 23000 Annaba, B.P. 12, Algerie.

Abstract:Using FP-LAPW method, the structural and volume thermal expansionparameters of Cu-

GaTe2 have been calculated and compared with available theoretical and experimental data. CuGaTe2 is a promising materials for photovoltaic application due to their high absorption coefficient in the visible range. For the first time we find the effects of temperature and pressure on volum thermal coeificient of CuGaTe2, which are very useful for optimizing crystal growth.

Keywords:Ab-initio study, Ternary Chalcopyrite semiconductor, Structural and mechanical properties

FINETE ELEMENT ANALYSIS OF STONE COLUMN INSTALLATION

A.Remadna1, S. Benmebarek2,A. Abdi3

1,NMISSI Laboratory, Civil Engineering and Hydraulic Department, Mohamed Khider-Biskra Uni-versity, Algeria

3LRNAT Laboratory, Moustafa ben Boulaid-Batna 2 University, Algeria Abstract:Vibro stone columns are usually used to improve the load-settlement characteristics of soft

soils. The design of stone columns is usually based on their performance as “wished-in-place” columns (no installation effects). This paper describes the results of numerical simu-lation studding the installation effects of stone columns in a soft soil. Cylindrical cavity ex-pansion is used to evaluate the installation effect of stone column. A numerical model was created with PLAXIS 2D in axisymmetric geometry to reproduce the lateral expansion. It was found that application of radial expansion will produce a significant improvement on the lateral earth pressure coefficient (K). After the installation of the column the excess pore pressure begin to dissipate allowing soil effective stress to increase which leads to im-provement of soil stiffness.

Keywords:finite element analysis, stone columns, installation effect, cavity expansion, effective stress.

The effects of thermal buoyancy strength and inclination angle on steady flow and heat transfer

of incompressible fluid around a heated square cylinder.

Laidoudi Houssem1,*, Bouzit Mohamed1 Laboratoire des Sciences et Ingénierie Maritime (LSIM), Faculté de Génie Mécanique, USTO-MB,

BP 1505, El-Menaouer, Oran, 13000, Algérie. E-mail: [email protected]

Keywords: Mixed convection- Heat transfer- Drag Coefficient- NussetNumer- Steady flow, Richard-

son number- ANSYS-CFX. Abstract: This paper represents a numerical investigation of incompressible flow of Newtonian fluid

and mixed convection heat transfer across an inclined square cylinder confined in a two-dimensional channel, the simulations are carried out in steady laminar flow regime under the effect of radial thermal buoyancy. The governing equations including momentum, con-tinuity and energy are solved based numerically on the commercial package called ANSYS-CFX. The increase of thermal buoyancy strength is brought out by increasing gradually the Richardson number. The obtained results are presented and discussed for the range on these conditions as: Reynolds number (Re = 10 to 40), Richardson number (Ri = 0 to 2), inclination angle (α = 0 to 45) at fixed value of Prandtl number of (Pr = 0.71) and blockage ratio of (β = 1/4). The mean results are depicted in terms of streamline and iso-

therm contours to analyze the found phenomena. Moreover, the total drag coefficient and average Nusselt number are computed and plotted to determine exactly the effect of ther-mal buoyancy and inclination angle on fluid structure and heat transfer rate.

Free vibration of sandwich FGM beams

M. Bouamama1, A. Elmeiche1,K. Refassi1, A. Megueni1

1University of SidiBel Abbes, Mechanics of structures and solids Laboratory, BP 89, City Ben M’hidi, SidiBel Abbes, Algeria

Abstract:Sandwich structures are widely used in the field of aeronautics andspace because of their

good stiffness ratio. This work is devoted to the study of the vibratory behavior of a sand-wich beam in FGM properties with a fraction of variable volume. The purpose of this paper is to see the influence of the skin thickness of the sandwich beam on the natural system fre-quencies, using the classical Euler-Bernoulli theory (CLBT) and assuming that Material properties of the FGM layer will be evaluated continuously in the direction of thickness ac-cording to the power law (P-FGM).

Keywords:Sandwich beams Vibration, FGM,naturalfrequencies.

Elaboration and characterization of thin films of ZrO2: Ni-doped using the Dip-coating tech-nique.

S. MOKRANE1*, B.Benrabah2, B.ABIDRI1

1 ,2 Laboratoire des Matériaux Magnétiques, Faculté des Sciences, Université DjillaliLiabes de Sidi Bel-Abbes 22000 Algérie.

2 University Ibn Khaldoun –Tiaret, Faculté des Sciences de la Matière14000 Algeria 1 [email protected] [email protected]

Abstract:The transparent conductive oxydes in thin layers generally and the films of zirconia oxydes

in particular have potential applications in many fields, essentially where it is necessary si-multaneously to have good transparency in the visible and good electrical conductivity. The sol-gel Pauling method was chosen to Elaborate the films of ZrO2. In this work ,we have prepared thin layers of ZrO2 none dope and doped with 1% ,3%,10% and 20% nickel of the nickel zeolite samples produced ,using spectrophotometry ( ultra – purple – visible) infrared and complexe impedance spectroscopy , the experimentale results found are acceptable and possible to verify that the ZrO2 thin films are relatively homogene-ous and good quality.

Key words: Sol-gel,Dip-coating,zirconium oxydes (ZrO2),Nickel doping,semi-conductor.

Transverse Shear Effect on the Static Behavior of Functionally Graded Sandwich Plate

Hamidi Ahmed1, Zidour Mohamed,Sadoun Mohamed3, Belmahi Samir2 1University of Bechar, Department of Civil Engineering, P.O.Box 417 Road ofKenadsa 08000, Be-

char, Algeria

2Universityof Tiaret, Department of Civil Engineering,P.O.Box78 zaâroura 14000,Tiaret, Algeria. 3University of Mascara, Department of Civil Engineering, Mascara-Algeria

Abstract:The objective of this research is to study the transverse shear effect on the static behavior

of functionally graded sandwich plates. The main advantage of this approach is that, in ad-dition to incorporating the thickness stretching effect, it deals with only 5 unknowns as the first order shear deformation theory, instead of 6 as in the well-known conventional sinu-soidal plate theory. The material properties of the sandwich plate faces are assumed to vary according to a power law distribution in terms of the volume fractions of the constituents. The core layer is made of an isotropic ceramic material. Comparison studies are performed to check the validity of the present results from which it can be concluded that the proposed theory is accurate and efficient in predicting the behavior of functionally graded sandwich plates. The effect of side-to-thickness ratio, aspect ratio, the volume fraction exponent, and the loading conditions on the static behaviorof functionally graded sandwich plates is also investigated and discussed.

Keywords:Sandwich plate; Transverse shear; analytical modelling; functionally graded material;

stretching effect.

Free vibration analysis of chiral double-walled carbon nanotube embedded in an elastic me-dium using non-local elasticity theory

K.RAKRAK1, M.ZIDOUR2, A.CHEMI1, H.AYAT3

1. Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie. [email protected]

2. Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algerie. [email protected]

3. Laboratoire de géométraux, Université Hassibabenbouali, Chlef, Algerie. [email protected]

Abstract:The transverse free vibration of chiral double-walled carbon nanotube(DWCNTs)embedded

in elastic medium is modelled by the non-local elasticity theory and Euler Bernoulli beam model.The governing equations are derived and the solutions of frequency are obtained. According to this study, the vibrational mode number, the small-scale coefficient, the Winkler parameter and chirality of double-walled carbon nanotube on the frequency ratio (χN) of the (DWCNTs) arestudied and discussed. The new features of the vibration behav-iour of (DWCNTs) embedded in an elastic medium and the present solutions can be used for the static and dynamic analyses of double-walled carbon nanotubes.

Keywords:Vibration, Nanotube, Zigzag, Armchair, Chirality, Non-local

Laminar Free Convection Heat Transfer in a square cavitywith heat source of different lengths

Abderrahmane AISSA1, R FARES3, A MEDDEBER 1, HABIBI Samir1 1 (LPQ3M), Mustapha StambouliUniversityof Mascara, Algeria 2 (FJV/LERMAB), Henri Poincaré Institute of Longwy, France

3,Université des Sciences et de la Technologie - Oran – Algérie *Corresponding author: [email protected]

A numerical investigation of free convection heat transfer stability in square cavity having CuO-Water nano fluid and superposed porous mediumwith discreteisoflux heat source of different lengths is performed. The adiabatic unheated portions and the discrete heat source are mounted at the inner wall. The top and bottom walls are adiabatic, while the outer wallis maintained at a lower tempera-ture. Continuity and momentum quations were discretized by means of the control volume method leading to a coupled algebraic equation set that was solved via the SIMPLE method. The numerical results for various governing parameters of the problem are discussed in terms of streamlines, iso-therms and Nusselt number in the annulus. The results show that the increase of heat sourcelength ratio decreases the critical Rayleigh number. We can control the flow stability and heat transferrate in varying of the length of heat source. Keywords: free convection, Rayleigh number, volume fraction, Nusselt number.

Towards a thermal characterization of a firefighters protective clothing

S. Dahamni1,2,*,A. Benarous1,2

1Hassiba Benbouali University, Dpt of Mechanical Engineering, Hay Essalem, Chlef, Algeria 2CEMSM Laboratory, Hay EsalemChlef, 02000,Algeria.

Abstract:In the present work, an unsteady analysis is carried out for the thermal characterisation of a

fire-fighter protective clothing. Coupled radiative and conduction heat transfers are consid-ered inside the clothing with a focus on the first skin layer. The protective garment is mod-elled as a 1D solid medium, featuring three layers of tissues, separated by several air-gaps. A parametric analysis is performed in the aim to predict the effect of conductive and radia-tive tissue properties fluctuation on the first skin's layer temperature.The results obtained were compared with stationary 2-D calculations, and faced to unsteady simulations too, based on the finite volume method. A 50% relative reduction in the absorptivity of the skin (in the case of wearing a fine knitted fabric) makes it possible to reduce the surface tem-perature of the skin to a tolerable value.

Keywords:Protective clothing,Fire safety,Multilayered tissue, Coupled heat transfer.

Numerical analysis of the seismic response of rock fill: pile-supported wharf on sliver rock dike

case

L. Deghoul1,, S. Gabi1 1Mouloud MAMMERI University of Tizi-Ouzou (UMMTO); Geomaterials, Environment and Plan-

ning Laboratory (LGEA); Campus Hasnaoua, BP 17 RP, 15000 Tizi-Ouzou, Algeria. Abstract:Rockfill is not usually used in construction, except dams and maritime dikes.Then, its beha-

vior is not very known under seismic loading. The aim of this study is to investigate the seismic behavior of a sliver (cut slope) rock dike of pile supported harbor wharf. The wharf consists of a platform based on several vertical piles including batter piles connected to the waterside of the wharf deck, all embedded in a dense sand. A sliver rock dike configuration is composed by a thin layer of rock overlaid a slope of loose sand. Two constitutive models using the finite elements code PLAXIS 2D were used. These models are a linear elastic perfectly plastic model (Mohr-Coulomb shear failure criteria), and Hardening Soil Model with Small-Strain Stiffness (HSSmall) which permits to take into account the soil shear modulus degradation with shear strains. Numerical model was validated with the measured data of the centrifuge model at the Center for Geotechnical Modeling, University of Cali-fornia, Davis Campus (UC Davis). Horizontal displacements in the dike were compared. The results obtained from the Mohr-Coulomb model recorded a large gap compared with

those obtained from the Hardening Soil Model with Small-Strain Stiffness (HSSmall). Then, the HSSmall model considered soil stiffness to decrease nonlinearly with increasing strain amplitude;it thus showed more realistic modeling.

Keywords: sliver rock dike, finite element analysis, piles, seismic,wharf.

Aerodynamic Shape Optimization of NACA0012 Profile using MMO Method

Abd Ellatif AMOR1; Ramzi MDOUKI2; Ahmed BETTAHAR1. 1University of Chlef,LPTPM, Esalem City, 02000, Chlef, Algeria.

2University of Tébessa, Street of Constantine, 12000, Tébesaa, Algeria.

Abstract: This paper presents the implementation of optimization technique that treats the design of airfoil configurations. Where the design variables are handled by the Torc-zon Optimizer that used as part of direct search methods for optimization. Direct search methods are zeroth order, as they only use the objective function values for optimization. The direct search methods do not use the derivatives. The Torczon Op-timizer provides an accurate way for computing the objective functions (Maximum lift; Minimum drag;Minimize the drag-lift ratio of an airfoil NACA0012) with respect to the design variables. The results demonstrate that the Torczon Optimizer can effi-ciently and significantly improve the aerodynamic performance of the design in a shape optimization problem.

Key words:Aerodynamic shape optimization, NACA 0012, MMO, lift, drag, Ratio lift/drag, Optimum Aerodynamic Design.

Etude Thermique d’un Multi jet Tourbillonnaire Impactant en mode Confiné

M. Braikia, A. Khelil, L. Loukarfi, W. Medouar, Y.Bouhamidi

Laboratoire de Contrôle, Essais, Mesures et Simulation Mécanique, Université de Chlef, B.P. 151, 02000 Chlef, Algérie

Résumé:La compréhension des effets du confinement d’un multi jet tourbillonnaire, sur le taux d'en-

traînement de l'air et sur la stratification de la température est très importante pour l'efficacité du processus de conditionnement d'air. Les jets impactant sont un moyen efficace d'optimisa-tion des transferts thermiques entre un fluide et une structure solide. Ils sont, à ce titre, utili-sés dans diverses applications industrielles telles que les processus de rafraichissement, de réchauffement ou de séchage. Une série d’études expérimentales a été menée pour détermi-ner l’influence de différents facteurs sur les caractéristiques et la structure du jet tourbillon-naire multiple permettant d’obtenir le mélange assurant l’homogénéisation de l’ambiance dans les locaux et de même dans les chambres de combustion.

Mots Clés : Jet tourbillonnement ; confinement ; jet impactant ; multi-jet ; homogénéisation ther-

mique

Analyse expérimentale et analytique d’un palier hydrodynamique

MayasSaeed AbdullahABDELWAHAB1, MiloudTAHAR ABBES1 1Laboratory of mechanical and energy, University of Chlef, HayEsalem City, 02000, Chlef, Algeria.

Résume : Le présent article concerne l’étude d’un palier court en lubrification hydrodynamique. Dans

une première partie l’étude du palier est expérimentale et s’effectue sur un banc d’essai TM 280 (GUNT)situé dans le laboratoire d’hydrodynamique du département de mécanique. Les pressions sont mesurées en 16 points selon la direction axiale et circonférentielle du palier par des tubes manométriques. La répartition de la pression est analysée en fonction de la vi-tesse de rotation du tourillon et de la température selon des cas de chargement fixés suppor-tées par le coussinet. Dans une deuxième partie l’étude est analytique et se base sur la réso-lution du problème par l’utilisation de solution approchée de l’équation de Reynolds et d’abaques pour la détermination de l’épaisseur minimale du film lubrifiant, la pression maximale, le coefficient de frottement, le débit de fluideet le mouvement par le calcul de l’excentricité.

Mots clé:Palier hydrodynamique court, mesure manométrique de la pression, pression axiale et cir-conférentielle, caractéristiques optimales.

Dynamics and Thermal Study of a Fire-Induced Ceiling Jet

K. Nechab1,2, P. Piloto3,A.Benarous2 1UniversityHassibaBenbouali,Mechanical Engineering Dpt, Esalem City, 02000, Chlef, Algeria.

2LCEMSM Laboratory, Esalem City, 02000, Chlef, Algeria. 3Polytechnic Institute of Bragança. Campus de Santa Apolónia, 5300-253. Bragança. Portugal.

Abstract:One of the most important problems in fire protection is the rapid detection of fire in a room while the fire is sufficiently small to be easily controlled. Much of the work that is collected below deals with means to predict the temperature and velocities in the ceiling jet flow both above and re-mote from the fire source. In facilities with very high ceilings, the detectors could be closer to the ceiling than 1% of the ceiling-to-fire-source distance and will fall in the ceiling jet thermal and visc-ous boundary layers. The heat transfer was estimated using a formula for the temperature distribution below an adiabatic ceiling Tad, the new results were used to modify equations. The unconfined ceiling equations were used to estimate heat transfer to the confined ceilings of real compartment fire scena-rios.

Keywords: fire scenario,correlative models, CFAST, localized fires; plume and ceiling jet fires, two zone models.

Mixing Sequences Influence on Mechanicals Strengths in Flexion of Self-Consolidating Con-

crete Reinforced with Various Kinds of Fibers: Corrugated Steel Fibers, Polypropylene Fibers and Metal chips

S. Chaib1, R. Lassoued

1,2University Frères Mentouri, LMDC, Ain El Beye Avenue, 25000 Constantine, Algeria. Abstract:The material characterization of fibres reinforced self-consolidating concrete continues to

be an on-going topic of debate in the scientific community. The experimental campaign presented in this paper is aimed at identifying the impact of concreting sequences, on the mechanicals strengths in flexion of reinforced self-consolidating concrete. The various kneading sequences of the mixtures studied in this work are selected from the literature; they are differentiated in the moment of introduction of the fibres with the dry or wet con-stituents, and in resting time. The slumps were casted using self-consolidating concrete reinforced with diversity of fibres: Corrugated steel fibresMedafac, polypropylene fibres-Granifibres, and metal chipscome from the operations of turning mechanical parts ma-chining of the national railway company (Constantine’s commune, "East Algeria"). The re-sults are compared with those of conventional self-consolidating concrete. Using the out-comes obtained, we were able to distinct that the relevance of fibres addition proves its ef-ficiency when they are incorporated into the self-consolidating matrix, while some proce-dures should be more respected.

Keywords:concreting sequences; self-consolidating concrete, flexion mechanicals strengths, corru-

gated steel fibers, polypropylene fibers, metal chips.

Introduction du comportement mécanique des structures non homogènes sur une assise élas-tique

Nebab Mokhtar 1, Ait atmane Hassen1,2

1Laboratoire des Sciences des Matériaux et Environnement, HassibaBenboualiUniversity of Chlef, Algeria

2 Laboratoire des matériaux & Hydrologie, Université DjillaliLiabès de Sidi Bel Abbès [email protected]

Abstract:Les poutres ou les plaques ont été largement étudiés vis-à-vis les différentes sollicitations.

Notre travail, en fonction des travaux déjà effectués s’articule sur la variation de la réponse de l’assise élastique de quelques types de structures. Ses structures peuvent êtres confec-tionnées par des matériaux composites, Dans cet ’affiche, notre objectif était de nous adap-ter aux notions de comportement mécanique des structures (poutres, plaques, ...), en pre-nant en compte certains effets tels que les fondations élastiques et. Vu l'hétérogénéité de la réponse du assise sous une structure comme le cas du sol par exemple. Aussi, nous avons effectué le développement mathématique d'un modèle de structure (poutre).

Keywords:comportement mécanique des structures, déformation normale gauchissement, la fondation

élastique.

First-Principles Study of the Structural and Electronic Properties of (GaSb)n/(AlSb)m Superlattices

O. Cheref1,*, S. Benalia1,2, D. Rached1

1Laboratory of Magnetic Materials, Faculty of Sciences, DjillaliLiabès University of SidiBel-Abbes, SidiBel-Abbès 22000, Algeria

2Department of Physics, Institute of Science and Technology, El-Wancharissi University Center of Tissemsilt, Tissemsilt 38100, Algeria

Abstract:This work focused on the study of quantum well superlattices based on III-V semiconduc-

tor materials. These heterostructures have interesting properties of a perspective structural and electronic.Quantum well superlattices are extremely interesting because of their new properties, which are radically different from both isolated atoms and bulk, also because of their multi-characterizations and their performances exceeding those of conventional mate-rials.In this paper we report first-principles study of the structural and electronic properties of bulk GaSb, AlSb and their (GaSb)n/(AlSb)msuperlattices (where n and m are numbers of monolayers; n = 1, 2 ; m = 1, 2) in the zinc-blende phase (B3), by using the full-potential linear muffin-tin orbital (FP-LMTO) method in the framework of density functional theory (DFT) within the local density approximation (LDA) for the exchange correlation func-tional. We seek to more carefully and accurately assess the effects of different superlattic-es configurations on electronic properties and, in particular, to observe the dependence of band gap behavior on the layers used.

Keywords:FP- LMTO , superlattices, structural properties, electronic properties.

Critical buckling load of chiral double-walled carbon nanotube using non-local theory elasticity

A .Chemi1, K.Rakrak1, M. Zidour2, H .Heireche3

1Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie

[email protected] 2 Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algerie.

[email protected] 3 Laboratoire des Matériaux et Hydrologie, Université de Sidi Bel Abbés, BP 89 Cité Ben M’hidi,

22000 Sidi Bel Abbés, Algerie).

Abstract:The present paper investigates the elastic buckling of chiral double-walled carbon nano-tubes (DWCNTs) under axial compression. Using the non-local elasticity theory, Timo-shenko beam model has been implemented. According to the governing equations of non-local theory, the analytical solution is derived and the solution for non-local critical buck-ling loads is obtained. The numerical results show the influence of non-local small-scale coefficient, the vibrational mode number, the chirality of carbon nanotube and aspect ratio of the (DWCNTs) on non-local critical buckling loads of the (DWCNTs). The results indi-cate the dependence of non-local critical buckling loads on the chirality of single-walled carbon nanotube with increase the non-local small-scale coefficient, the vibrational mode number and aspect ratio of length to diameter.

Keywords:Elastic medium,buckling, Nanotube, Chirality, Non-local

A novel and simple HSDT for thermal buckling response

of functionally graded sandwich plates

B. ELMOSSOUESS1, M. BACHIR BOUIADJRA,S.KEBDANI 1Laboratoire de mécanique appliqué, Université des Sciences et Technologie d'ORAN Mouhamed Boudiaf,

BP 1505 Elmnouar 31000, ORAN, Algeria. 2Laboratoire des Structures et Matériaux Avancés dans le Génie Civil et Travaux Publics, Université de

Sidi Bel Abbes, Faculté de Technologie, Département de génie civil, Algeria. Abstract:A new higher shear deformation theory (HSDT) is presented for the thermal buckling

behavior of functionally graded (FG) sandwich plates. It uses only four unknowns, which is even less than the first shear deformation theory (FSDT) and the conven-tional HSDTs. The theory considers a hyperbolic variation of transverse shear stress, respects the traction free boundary conditions and contrary to the conventional HSDTs, the present one presents a new displacement field which includes undeter-mined integral terms. Material characteristics and thermal expansion coefficient of the sandwich plate faces are considered to be graded in the thickness direction ac-cording to a simple power-law distribution in terms of the volume fractions of the constituents. The core layer is still homogeneous and made of an isotropic material. The thermal loads are supposed as uniform, linear and non-linear temperature rises within the thickness direction. An energy based variational principle is used to derive the governing equations as an eigenvalue problem. The validation of the present work is carried out with the available results in the literature.

Keywords:Thermal buckling; Sandwich plate; Functionally graded materials; Plate theory.

Investigation and correction of errors fabrication

F. MESSAOUD (1*) , M. RAHOU(2), F. SEBAA(1)

Université de Tlemcen, faculté de technologie, Département de génie mécanique (2)Ecole supérieure des sciences appliquées,Tlemcen , Département de Technologie

(1,2)Laboratoire: IS2M *Email:[email protected]

Abstract: The objective of this paper is to describe the geometric errors resulted by different source-son the workpiece, this errorsis an important factor which is needed to minimize to get the most accurate product and minimize the rejection and the imperfection.To carry out our ob-jective,a set of equations which characterize different cause (wear of the cutting tool, tra-jectory defects, vibration …) is presented, by using this equations the global defects which represent tolerance range is determined.

Crack initiation and propagation in HDPE under tensile loading

A. zerrouki1, A. Boulenouar1,M. Mohamed1**, Z. Harchouche1***

1Laboratory of Materials and Reactive Systems, Mechanical Engineering Department, University of Sidi-Bel-Abbes, BP. 89, City Larbi Ben Mhidi, SidiBel Abbes 22000, Algeria.

Abstract: In this paper, an experimental fracture tests are carried out using HDPE plates with a cen-

tral crack inclined by an angle α (CCT), submitted on tensile loading. This work aims to treat the crack initiation and propagation phenomenon in the HDPE. The obtained results allow the prediction of the initial angle of propagation and the observation of crack tip dis-placement. The initial angle is evaluated and compared with numerical results obtained by the use of SED (Strain Energy Density) criterion. This evaluation shows that the plan of crack propagation is perpendicular to the direction of the maximum principal stretch.

Keywords:Angle of initiation, Crack propagation, HDPE, Tensile loading.

Modèle Expérimental De Réparation Symétrique Par Patch En Carbone/Epoxyde Des Struc-

tures Métalliques Fissurées

N. Deghoul1, L. Errouane1, Z. Sereir1

1 Laboratoire structure de composite et matériaux innovants – LSCMI, Faculté de génie mécanique, BP 1505 El M’Naouer, USTOMB, Oran, Algérie.

Résumé:Le processus de réparation des structures en utilisant le collage des composites est au-

jourd’hui une méthode très efficace et très économique pour augmenter la durée de vie des structures fissurées. L’emploi des patchs en composites peut contribuer à la réduction de la concentration de contrainte à la pointe de fissure. Ils constituent un moyen intéressant de réparer certaines structures assurées ou corrodées grâce à leurs nombreux avantages par rapport aux réparations traditionnelles. Aujourd’hui, le collage connaît un grand développement dans le domaine naval et génie civil. Cette technique est par exemple utili-sée pour connecter des matériaux composites sur des structures en acier, dans le but de les réparer ou de les renforcer, C’est dans ce cadre qu’on a établi cette expérience qui a pour objet, la réalisation des échantillons mince en aluminium contient des défauts de longueurs différente pour faire des essais de traction sur les trois cas traités (plaque non réparée, répa-rée par un patch simple et par un patch double en composite) afin estimer la contrainte élas-tique, à la rupture et les déformations.

Mots clés:Fissure, Rupture, Mode I, Patch en composite.

Etude comparative desperformances de deux types d’agitateurs mécaniques (bipale et ancre) Y.KAMLA1, H.AMEUR, A.HADJEB3, D.SAHEL3

1Department of Science and Technology, Faculty of Technology, Hassiba Ben Bouali’s Unisversity,

Chlef, Algeria

2Department of Technology, Institute of Science and Technology, Ahmed Salhi’s University Center, Ctr Univ Naâma, 45000, Algeria 2

3Faculty of Mechanical Engineering, University of Science and Technology USTO-MB, Oran, Alge-ria

Résumé : Le présent manuscrit donne une étude numérique comparative entre les écoulements géné-

rés par un bipale simple et une ancre d’agitation mécanique. Les champs d’écoulement ain-si que tous les paramètres de mélange ont été obtenu à l’aide du code de calcul ANSYS CFX.14 qui offre de nombreux avantages à ce propos. es résultats obtenus ont permis de sélectionner une géométrie efficace tout en retirant quelques notions très utiles à ce propos vu que les systèmes d’agitation mécaniques sont devenus le souci de tous les industriels.

Étude Expérimentale de l'Usinabilité de l'acier 42 Cr Mo4 avec des Outils en Carbure revêtu et

non revêtu.

B. Hamadi1 , L. Boulanouar2,M.A. Yallese3, H. Bekouche1 1ResearchCenterinIndustrialTechnologiesCRTI,P.O.Box64,Cheraga16014-Algiers,Algeria

2University of Annaba, LRTAPM, Annaba, Algeria. 3University of Guelma,LM S,Guelma, Algeria.

Résumé:Dans ce document, une étude expérimentale est réaliséeafin d'évaluer l'effet de matériau de

revêtement sur les performances des outils de coupe en tournage de l'acier 42 Cr Mo4. Une étude comparative a étéréalisée entre les outils en carbure non revêtu et revêtuavec une couche de revêtement Al2O3/TiCN. Lesoutils decoupe ayant la même géométrie. Le procédé ANOVA a été utilisée pour quantifierleseffets des paramètresde coupe surl'usinage des surfaces. L'effet des couches de revêtementsur la qualité de surface est également étudié. On observe qu'une plus faible rugositéde surfaceest obtenue-lorsde l'utilisationde (Al2O3/TiCN)plaquetterevêtu.

Mots Clés: Outil De Coupe, Revêtements Durs, RSM, Rugositédesurface, CaractérisationdeRevê-tement.

THE EWF METHOD ON HDPE DIGITAL AND EXPERIMENTAL STUDY

HOUARI TAREK1,BENGUEDIAB MOHAMED 2 , HOUARI MOHAMED .S3, KHELLAFI HABIB41.

1.University Mascara , Bab ali city , Mascara, Ageria [email protected] 2. University SidiBelabbes , City Larbi Ben MHidi 22000, SidiBel abbess , Age-

[email protected] 3. University Mascara , Sidi Said city ,Mascara , [email protected]

4. University Mascara , El Bordj city , Mascara, Ageria Abstract:High-density polyethylene (HDPE), a model polymer of the semi-crystalline family, is a real industrial interest since it is one of the most produced thermoplastic polymers in the world The study of the deformation and behavior to damage and breakage of HDPE has been proposed us-ing experimental and numerical approaches. Two energy approaches (integral J and EWF) of the rup-ture mechanics were examined on two types of test specimens (CT, DENT) subjected to tensile stress. We conclude that the EWF method by its simplicity is the most suitable for the characterization of the intrinsic rupture parameter to our material. Keywords:Polyéthylène haute densité; Triaxialité; Rupture; Intégrale J ; Méthode EWF ; Modèles d’endommagement; Modélisation par éléments finis.

Optimization of Damage Parameters of the GTN Model for PVC

H. Khellafi1,T.Houari2 , HM. Meddah 1,B. Ould Chikh El Bahri1 and M. Bendouba2

1Universityof Mascara,LSTE, BP 763 Mascara Algeria 2Universityof Mascara,LPQ3M, BP 763 Mascara Algeria

Abstract:The polyvinyl chloride PVC is a polymer material widely used for a large variety of appli-cations. The present work focuses on the identification of the physical processes responsible for the mechanical properties of the PVC containing different crystallinities rate applied in large deforma-tion and different strain rates. In order to understand the behavior of the PVC, a thermodynamic modeling is needed. Therefore, the contribution of this approach was demonstrated by experiment and numerical modeling. This comparative study demonstrates that the proposed model provides better agreement with experimental evidence. Keywords:Damage, Fracture, PVC, Numerical analysis, FEM.

Free Natural Convection In Vertical Annular Cylinder In Porous Medium

Mohamed Amine MEDEBBER1, Abderrahmane AISSA2, Fares redouane3Noureddine RETIEL1

1Laboratoire de Modélisation Numérique et Expérimentale des Phénomènes Mécaniques, Université

de Mostaganem, B.P.188 27000 Mostaganem, Algérie 2Laboratoire de Physique Quantique de la Matière et Modélisation Mathématique (LPQ3M), Uni-

versité Mustapha Stambouli de Mascara, Algeria [email protected]

Abstract:This article reports a numerical study of free convection in a vertical cylinder partially an-nuluscavity having CuO-Water nano fluid and superposed porous medium. The outer vertical wall is maintained at lower uniform temperature and concentration, while the inner vertical wall is main-tained at higher uniform temperature and concentration. The top and bottom horizontal walls are adia-batic and impermeable to mass transfer. Continuity and momentum equations were discretized by means of the control volume method leading to a coupled algebraic equation set that was solved via the SIMPLE method. The compilations have been obtained for fixed parameters, Prandtl numbers Pr=1.0, Lewis number Le=2 andheight ratio X=0.5. The thermal Rayleigh number (Ra) and the buoyancy ratio (N) are respectively varied in the range 104≤Ra≤107 and 0.8≤N≤1.3. The influence of physical and geometrical parameters on the streamlines, isotherms, isoconcentrations, localNusselt has been numerically investigated in detail. KEYWORDS:free convection, the finite volume method, partially annular, the Nusselt number, the Sherwood numbers.

Study of the Crack Propagation of a Polyethylene

S. LIAMANI1

1Université ofSidi Bel Abbes, UDL, AddressBP 89, Cité Ben M’hidi,Sidi Bel Abbes, Algeria Résumé:The new gas transmission and distribution pipelines installed throughout the world and in

particular in Algeria, are made exclusively of polyethylene (PE) because of its advantages and its performances. The objective of this work is to analyze the finite element method the behavior out of a high-density polyethylene pipe.A criterion has been used to describe the crack behavior which is the criterion of the stress field represented by the constraint intensity factor in the open mode.

Keywords:Polyethylene, Rupture, Cracking, HDPE, Pressure.

Calcul des contraintes d'interface dans un nano-composite (Polymère/nanotube de carbone type

zigzag).

Mohamed MEDANI3, Ammar BOULAL3, Mohamed ZIDOUR1,2 , Abdelnour BENZAIR3, Houari HEIRECHE3.

1 Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algeria 2 Laboratoire de Géomatique et Développement Durable, Université Ibn Khaldoun de Tiaret, Algérie

3Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie Résumé : Ce document présente une étude analytique d'un nano-composite (polymère renforcé par des nano-tubes de carbone monocouche (type zigzag)) basée sur les théories d'élasticité et le modèle de fibre arrachée. Les équations d'équilibres de ce modèle, les conditions aux limites et le développement ma-thématique permettent de déterminer des relations pour calculer les contraintes d’interface, la force d'arrachement admissible et la fraction volumique. La présente méthode offre la possibilité d'utilisée des différents paramètres qui peuvent influencer la distribution des contraintes d’interface dans le na-no-composite (polymère/ nanotube de carbone), tel que la chiralité du nanotube de carbone, le module de Young du nanotube et de la matrice polymère. Les résultats obtenus indiquent clairement la dépen-dance des contraintes d’interface avec la chiralité du nanotube.

Mots clés: nanotubes de carbone; fibre arrachée; module de Young; chiralité; zigzag.

Prediction of Reliability Analysis of Composite Tubular Structure Under Hygro-Thermo-Mechanical Loading

A.Maizia1, Abdelkader Hocine1, Hocine Dehmous2, and David Chapelle3

1 Laboratoire de Contrôles, Essais, Mesures et Simulations Mécaniques, HassibaBenboualiUniversity of Chlef,Esalem City, 02000 Algeria; 2Département de Génie Civil,Université Mouloud Mammeri,

Campus Hasnaoua, Tizi-Ouzou, Algeria; 3Department of AppliedMechanics, Univ. Bourgogne Franche-Comté,FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM, Besançon, Franc

Abstract:The present paper focuses on reliability prediction of composite structure under hygro-

thermo-mechanicalloading, conditioned by Tsai-Wu failure criterion, where the Monte–Carlo method is used to estimate thefailure probability(Pf ). This model was developed in two steps: frst, the development of a deterministicmodel, based on an analytical and numer-ical approach, and then, a probabilistic computation. Using thehoop stress for each ply, a sensitivity analysis was performed for random design variables, such as materials proper-ties, geometry, manufacturing, and loading, on composite cylindrical structure reliability. The probabilistic results show the very high increase of failure probability when all parameters are considered.

Keywords:Composite structure, reliability, failure probability, Monte–Carlo, finite elementmethod.

NUMERICAL MODELING OF ROAD STABILIZATION SYSTEM

Amina ABDI1 , Pr Toufik KARECH1 Abdeljalil REMADNA2

1Université de Moustafa ben Boulaid-Batna 2, Département de génie civil, Batna-ALGERIE

2 Laboratoire NMISSI, Département de Génie Civil et d’Hydraulique, Université de Biskra, Algérie. [email protected] [email protected] [email protected]

Abstract: The evaluation and the prediction of the ground movements constitutes nowadays a major

target as well for the civil authorities as for the researchers. To ensure the stability of the grounds opposite to these dangerous movements, especially in the urban areas and the trans-port networks (roadway, rail…), various solutions are proposed, of different materials and construction technologies and the most favorable among, these proposals, is realized. In this paper we will analyze in 2D the stability of a road at the level of the South passage of Mas-sinissa in Constantine, using micro piles for the reinforcing of the ground, and retaining wall for the stabilization of the slope

Keywords: road, stabilization, road embankment, wall-retaining, micro-piles, slope.

Experimental and Numerical Studies for the Effect of Aging Adhesive Using for Patch Compo-site Repair

M. BEZZERROUKI1,,B. BACHIR BOUIADJRA1, K. MADANI1

1University DjilaliLiabes de Sidi-Bel-Abbès, LMPM, BP89, City Ben Mhidi, Sidi-Bel-Abbès,Algeria. [email protected]

Abstract:The performance and the durability as well as the reliability of the repairs of the structures

are directly influenced by the outside environment such as the variation hastens of the tem-perature, the radiations, the humidity, the mechanical solicitation. The ageing of bonded repairs or one of these components is an important leads to the rupture of the repaired metal structures. In this work we will exploit experimental data for the calculation by numerical simulation using 3D finite elements method to study the mechanical behavior of repair de-fects.

Keywords:adhesive, aging, J integral, finite element analysis.

Evaluation of Fracture Parameters Using a Virtual Strain Gage approach in SENT Specimen.

F. Khelil1,a *,S. Zengah1, F. Benaoum1,N. Benhamena1, M.khaldi1

1LPQ3M laboratory,facult of Science and Technologies, University Mustapha Stambouli, Mascara, 29000, Algeria.

Abstract.The main scope of this work is to present, the efficiency of a proposed numerical method for the evaluation of the stress intensity factor (SIF) indicated by T-stress and the biaxiality pa-rameter β, by using the virtual strain gage method. This method is based on the optimal posi-tion of a virtual strain gage, located near a crack tip, such so that the effect of dominant sin-gular strains is negated in order to determine these parameters accurately. In the present study, a strain point’s calculation technique is investigated for evaluating the fracture pa-rameters (KI, T, β) under static loading conditions for PMMA Single Edge Notched Tensile specimen (SENT). Conventional simulations by finite element method (FEM) are also carried out and the result is compared to that of the developed method. A good agreement was ob-served between the results of the present approach and those of the experimental data and numerical calculations. Furthermore, it is worth noting that the proposed method is more advantageous than the conventional FEM because it can lead to accurate results with much less computational effort.

Keywords:Stress intensity factor, T-stress, Biaxiality parameter, FEM.

3-D modeling of heat transfer in Friction stir welding

Z. Harchouche1, M. Zemri1*,A. Zerrouki1**

1Laboratory of Materials and Reactive Systems, Mechanical Engineering Department, University of Sidi-Bel-Abbes, BP. 89, City Larbi Ben Mhidi, SidiBel Abbes 22000, Algeria.

Abstract:In this paper a numerical simulation of heat transfer induced by friction stir welding is car-

ried out on sheets of aluminum alloys. An assumption of a moving coordinate was intro-duced to reduce the difficulty of the moving tool modeling. The input heat generated by the tool shoulder and the tool pin are considered in this model. Using the heat source of the model proposed by Colegrove. This 3-D numerical simulation was implemented and inte-grated into the finite element code « COMSOL Multiphisics». The obtained results show a good agreement with those obtained by other authors.

Keywords:FSW, heat transfer, heat flux, COMSOL.

Comparaison Entre La Détermination Analytique Et Numérique Du Facteur D’intensité De

Contraite Et l’Intégrale J pour CT 75

A.Bensari1, B. Bouchouicha1, B. Ould chikh2,M. Tirenifi1, S. Kouadri3,H.M.Meddah2 1 Université de Sidi Belabbes, LMSR. BP 89, 22000, Sidi Belabbes, Algérie

2 Université de Mascara, LSTE, 29000, Mascara, Algérie. 3Département Technologie. Ecole Supérieure Du Matériel El-Harrach Alger, Algérie

[email protected], phone +213-660 811 033

Résumé : Evaluer l’intégrité d’une structure consiste à prouver sa capacité à remplir ses fonctions mécaniques pour tous les modes de chargement, normaux ou accidentels, et tout au long de sa durée de vie. Dans le contexte de la sûreté nucléaire, pour les structures les plus impor-tantes comme la cuve ou le circuit primaire, on envisage la présence d’une dégradation re-groupant plusieurs aspects, comme par exemple des fissures. On cherche alors, dès le dimen-sionnement, à montrer la résistance mécanique pour ce mode dégradé. On cherche également à monter la résistance mécanique d’une structure en présence d’une fissure lorsque des dé-fauts ont été détectés lors d’une inspection, cette fois quelle que soit cette structure. Cette démarche est appliquée, soit parce que l’on désire attendre avant de réparer (par exemple pour profiter d’une phase d’arrêt du réacteur), soit parce qu’une réparation n’est simplement pas possible. Par ailleurs, certains composants ne sont pas contrôlables (car inaccessibles), auquel cas on procède aussi à une démonstration de la tenue mécanique en présence d’hypothétiques défauts. Dans ce cadre, la mécanique de la rupture fournit les outils néces-saires à l’analyse des composants fissurés. Son objectif est d’établir des critères de rupture permettant de juger des marges de chargement en conditions de fonctionnement normales ou accidentelles. Chaque type de rupture doit faire l’objet d’une caractérisation spécifique.

Mots clés : Mécanique de la rupture, FIC, Intégrale J, Méthode des élément finis.

Contribution to the modeling of the hyperelastic behavior of the arterial wall

K. AIMENE1, M. OULD OUALI

1,2Université Mouloud MAMMERI de Tizi-Ouzou, Laboratoire Elaboration, Caractérisation des

Matériaux et Modélisation, BP 17 RP, 15000. ALGERIA. [email protected] [email protected]

Abstract: Computational biomechanics of soft biological tissue is increasing our ability to address

multidisciplinary problems of academic, industrial, and clinical importance. This article re-views parts of our current knowledge of the biomechanics of soft biological tissue, such as the arterial wall. One of the aims of studying arteries is to improve understanding in biologi-cal mechanisms involved in diseases such as hypertension, atherosclerosis or aneurysm. In this work, a theoretical modeling of the 3D artery mechanical behavior is proposed by as-suming a hyperelastic, anisotropic, active, pre-stretched and dynamic wall structure. The model is based on the description of mechanical contributions of micro cell wall components (elastin , collagen, smooth muscle cells ).

Keywords:Anisotropic, Hyperelasticity .Numerical modeling. Arterial Wall.

Etude analytique du comportement mécanique d'un nanotube de carbone type armchair.

Ammar BOULAL3,Mohamed MEDANI3, Mohamed ZIDOUR1, 2, Abdelnour BENZAIR3, Houari

HEIRECHE3. 1 Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algerie

2 Laboratoire de Géomatique et Développement Durable, Université Ibn Khaldoun de Tiaret, Algérie 3Laboratoire de Modélisation et Simulation Multi-échelle, Université de Sidi Bel Abbés, Algerie

Résumé: Dans ce travail on utilise le lien entre la mécanique moléculaire et la mécanique des solides,

un modèle équivalent en énergie est utilisé pour l'étude des propriétés mécaniques d'un nano-tube monocouche de carbone type armchair (SWCNTs). Premièrement, nous basons sur le principe de la mécanique moléculaire, l'énergie potentielle totale du système associé à la dé-formation des liaisons carbone-carbone et la variation d'angles des hexagones est obtenue. Puis, en considérant le (SWCNT) comme un cylindre mince soumis à un chargement axial de traction ou de torsion, l'énergie de déformation est obtenue sur la base de la mécanique des milieux continus. Ensuite, on détermine le module de Young, le module de cisaillement et coefficient de poisson du nanotube de carbone par l'égalité de l'énergie potentielle totale et l'énergie de déformation. Les résultats obtenus indiquent clairement la dépendance du mo-dule de Young, module de cisaillement et le coefficient de poisson avec la chiralité du nano-tube de carbone monocouche type armchair. Cette recherche sera utilisée comme référence pour l'application et l'utilisation du nanotube de carbone.

Mots clés:Nanotube, chiralité, armchair, l’énergie, Module de Young

Development of a New Euler Stress Formula For Buckling Analysis of Rectangular Plate Under a Mechanical Loads

Fouad.Bourada1, Mama. Ahouel2, Ahmed. Bakora2, Abdelouahed Tounsi2

1Departement of Civil Engineering, University Center BelhadjBouchaib of AinTemouchent, Algeria. 2Material and Hydrology Laboratory, DjillaliLiabes university of SBA Algeria.

Abstract:In this work, the study of the stability of the moderately thick and thick isotropic rectangular

plates simply supported will be presented, using a new simplified first-shear deformation theory with only four-variable developed by Mantari and Granados [1]. The effects of transverse shear are considered. The virtual works principle will be used to derive the equi-librium equations. The solutions of the buckling of the isotropic rectangular plates will be determined using the Navier procedure. New expressions of buckling stresses for mod-erately thick and thick plates similar to the classical Bryan formula for thin plates will be presented. The results found are compared with those given by Piscopo [2].

Keywords:Buckling, Thick plates, Navier's solution, simplified theory.

Etude du renforcement des voiles couplés hybrides par un matériau composite

L. Madouni1, M. Ould Ouali², A. Kris2, A. Ouzeriat2 and N.E. Hannachi1

1 Laboratoire LAMOMS. University Mouloud MAMMERI of Tizi-Ouzou, BP 17RP. Algeria. ² Laboratoire Elaboration et Caractérisation des Matériaux et Modélisation (LEC2M). University

Mouloud MAMMERI of Tizi-Ouzou, BP 17RP. Algeria. Abstract:La technique de renforcement par collage de matériaux comporsites offre une réponse perti-

nente. Cette étude s’intéresse aux cas du système structural constitué de voiles couplés hy-brides, ou La jonction entre les deux éléments voile-linteau constitue souvent une zone cri-tique. L’objectif de ce travail est d’identifier les apports possibles du renforcement par col-lage en matériau composites. L’évaluation des gains s’appuie sur les modifications des gains de ductilités et de résistances.

Keywords:Endommagement, renforcement par matériaux composites, structures mixtes, voiles cou-plés hybrides, linteaux de couplage.

Etude numérique de l’interaction des jets tourbillonnaires impactants:

Youcef Bouhamidi1,,*, Ali Khelil1, Mohamed Braikia1, Said Nechad1 ,larbi loukarfi1

1Université HassibaBenbouali, laboratoire de C.E.M.S.M. B.P. 121, 2000, CHLEF, ALGERIE

Résumé : L'objectif principal de cette étude, est d’évaluer numériquement l’influence de la disposi-tion géométrique des orifices de soufflage des jets tourbillonnaires impactant sur l’amélioration du transfert de chaleur dans les enceintes. Les résultats trouvés serons exploi-tés pour améliorer l’efficacité des systèmes de climatisation des locaux administratifs. Le modèle de turbulence k-ε RNG, Modèle k-εRealizable ont été utilisés dans cette étude, Plu-sieurs paramètres d’écoulements sont testés telles que la L’effet de la disposition géomé-trique du jet central et les jets périphériques, le nombre de jets périphériques , L’effet de la distance d’impact des jets sur l’homogénéisation et la stabilité thermique dans le local et l’effet des jets tourbillonnaires multiples sur le transfert de chaleur dans le cas ou le local contient des sources de chaleur. La confrontation des résultats numériques obtenus avec ceux disponibles dans la littérature a été présentée. La plupart de ces comparaisons sont en bon ac-cord avec les données expérimentales. Dans la deuxième partie de ce travail, on va choisir la configuration optimale pour améliorer le transfert de chaleur dans les locaux administratifs.

Mots Clés : jets tourbillonnaires, jets impactant, climatisation, Modèle k-ε RNG, Modèle, k-εRealizable.

Détermination des contraintes résiduelles desplaques en matériau composite

Moussa Abualnour1,2,Kheira Soltani2,Fatima Zohra ZAOUI3 1Université Mustapha Stambouli à Mascara,Algeria

2 Université de Sidi Bel Abbes, Algérie 3 Université de Mostaganem, Algérie

Résumé – L’étude sur l’analyse linéaire des contraintes résiduelles pour les matériaux à gradients de

propriétés, dites FGM est l’une des sujets les plus importants en génie et sciences des maté-riaux grâce à leurs utilisations dans les plus importants secteurs d’industrie (réacteurs nu-cléaires, réacteurs de fusion, navettes spatiales et le génie civil), la différence des propriétés thermiques des plis successifs et la fabrication des pièces à haute température de traitement vers la température ambiante fait naitre des contraintes résiduelles à leurs interfaces. L’objectif de ce thème est de déterminer les contraintes résiduelles dues aux sollicitations mécaniques et thermiques des structures en matériaux fonctionnellement gradués, en vue d’optimiser leur va-leur en fonction des propriétés du matériau suivant la fonction de loi de puissance (P-FGM).

Mots clés: analyse, contraintes résiduelles, plaque, FGM

Effect of implant shape on the mechanical behavior of bones under dynamic loading

W. Bensmain1, M. Benlebna, B. Serier3

123LMPM, Mechanical Engineering Department Faculty of Technology

University of SidiBel Abbes, Algeria Abstract:Dental implants have become a commonly used technique in dentistry for the replacement

of totally damaged teeth. However, the risks of failure are still experienced and remain dif-ficult to anticipate. Phenomena occurring around the bone-implant interface determine the biomechanical behavior of the implant. The geometrical shape of the implant condition the interfacial interactions between these two components of dental implantology. These inte-ractions are responsible for the load transfer to the bone and osseointegration phenomenon determining the stability and performance of dental implantology. The geometrical parame-ters of the implant determine its shape. This interaction effect is analyzed here in terms of stress distribution in spongy bone and cortical bone around implant geometries. To this end, several implant systems have been studied. These systems differ only in the form of the implant's upper.

Keywords:Implant shape, finite element, Stresses, Conicity.

Analyse de la Vibration Libre des Plaques Isotropes Epaisses en Utilisant une Théorie de Dé-formation de Cisailement Trigonométrique

Ahmed BOUKHARI (*1), Mohamed SEKKAL(2), Taleb Ouahiba(3), Bouazza FAHSI(2), Samir

BENYOUCEF(1), Abdeloauhed TOUNSI(1,2) (1) Laboratoire des Matériaux et Hydrologie,

Université de Sidi Bel Abbes, BP 89 Cité Ben M’hidi 22000 Sidi Bel Abbes, Algérie. (2) Laboratoire de Modélisation et Simulation Numérique.

(3) Département de génie civil, Faculté des Sciences et Technologie, Université de Mascara. Résumé :Dans ce travail, une théorie de déplacement de cisaillement trigonométrique à une seule

variable est appliquée pour l’analyse de la vibration libre des plaques épaisses. Dans cette théorie les déplacements axiaux utilisent une fonction sinusoïdale en termes de la coordon-née de l’épaisseur(z). Elle considère une variation raisonnable de la contrainte de cisaille-ment transversale à-travers l’épaisseur et satisfait la condition de la contrainte de cisaille-ment nulle aux bords de la plaque sans l’introduction des coefficients de correction de ci-saillement. Une plaque isotrope épaisse simplement appuyée est considérée pour l’étude numérique. La solution de Navier est employée pour déterminer les solutions analytiques. Les résultats sont obtenus pour les déplacements, les fréquences naturelles sont comparées avec ceux prédis par d’autre théorie d’ordre élève et la solution exacte de l’élasticité.

Mots clés : Plaques ; théorie d’ordre élevé ; vibration libre.

Dynamic Behavior Analysis of Advanced Composites Structures

I. Ait Sidhoum1, F.Bourada2,S.Benyoucef3,A.Tounsi4 1Laboratoire de mécanique appliqué, Université des Sciences et Technologie d'ORAN

MouhamedBoudiaf, BP 1505 Elmnouar 31000, ORAN, Algeria. 2 Centre Universitaire Belhadj Bouchaib Ain Témouchent-Algérie

3-4Material and Hydrology Laboratory, Université de SidiBel Abbes, Faculté de Technologie, Civil Engineering Département, Algérie.

Abstract:In this work we make the effects of ha / ratio and power indices more apparentwe com-

pared between the non-dimensional fundamental frequency variations of three types of functionally Graduated plates. The mechanical properties of the plates are variable in the direction of thickness according to a distribution of the power law with respect to the vo-lume fractions of the plates. components. At the end one can find the relation between the volumic fraction and the material characteristics. Keywords:constraint, T -stress, effective distance, notch, finite element analysis.

Effect of the Orientation of the Fibers on J-Integral of Repaired Cracks in Notched AA7075-T6 Structures Subjected to Uniaxial Tensile Stresses

Y. Chahraoui1, M. Khodja1,2, H. Fekirini1

1LMPM, Mechanical Engineering Department, University of SidiBel Abbes,cityArbi Ben Mehi-di22000, SidiBel Abbes, Algeria

2CSIR Materials Science and Manufacturing, MeiringNaude Road Pretoria, 0184, South Africa

Abstract:Structural fatigue cracking in airframes is a result of the usage and will finally occur in all

aging aircraft, extensive repairs are often linked to major disassembly of structures and long downtime periods. Bonded repairs using composite patches over metallic structures have been evaluated as a cost effective method to increase the life of damaged structures A typical damage within a highly loaded riveted skin to substructure fuselage component has been repaired under on aircraft conditions. The J-integral is a widely applied fracture mechanics parameter that relates to energy release associated with crack growth and is a measure of the deformation intensity at a crack tip. This study aimed at providing an overview of the performance and behavior of repaired cracked plate of AA7075-T6 alloy

Corresponding author E-mail address: [email protected]

with boron- epoxy bonded with FM73 Adhesive layer by Finite Element Method (FEM) using ABAQUS Software 6.14 [01] The bonded repair of the cracked plate provides a considerable decrease in the value of J integral where the J integral is highly reduced by the presence of the patch. This is due to the beneficial effect of the patch composite on the stress absorption at the crack tip and the relationship between the orientations of the fibers and the best results are given by the orientation of 0 °wherethe composite had un-idirectional lay-upand the fibers were oriented along the specimen length direction (paral-lel to the direction of load).

Keywords :plate, patch, crack, loading, stress, deformation, adhesive.

Characterization of PLC andLudersbands on 304LTRIP steel

TassaditCHERFI1, a *, Lydia LAARIBI2, a, TaousAMRANE3, a,MadjidALMANSBA2,band RabehFER-HOUM3,c

tassaditcherfi @gmail.com [email protected] [email protected] Laboratoire d’élaboration, caractérisation et mise en forme des matériaux, département de génie mé-

canique, université Mouloud Mammeri, Tiziouzou. Abstract.This paper focuses on experimental investigations on the geometric aspects of mechanical

instabilities produced in plasticity and more particularly those falling under the PLC effec-tobserved in304L TRIP steel.the analysis of the hardness profile of specimens is used for the geometric characterization of the PLC strips, the change in the mechanical properties of the material is taken into consideration to determinate the orientation, the tilt and the width of PLC bands;the hardness profile analysis reveals also that the strain-induced martensitic trans-formation takes placein the PLC bands.Studied aspects of the typology of the PLC phenome-non as well as the physical origin of this mode of instability compared to other types hetero-geneities of plastic deformation are presented.

Keywords:TRIP steel;PortlevinLe Chateliereffect ;Luders band.

Multi Resolution Analysis Applied to Digital Image Compression of Surface Defect of Rolled

Steel-Strip

A.Boudiaf1, A. Dahane 2,S. Boulkroune1. R Zaghdoudi1, Z Mentouri1,S.teleb1,Z Slimane1

1Research Center in Industrial Technologies CRTI P.O.Box 64, cheraga 16014 Algiers, Algeria 2Intelligent Systems Research Laboratory, University of Sciences and Technology, Oran, Algeria

Emails:[email protected] [email protected] Abstract:Recently, image compression technique has become more and more important in many ap-

plications such as business, medicine, military, and automation, because the main objective of this technique is to reduce redundancy of the image data in order to be able to store or transmit data in an efficient form. In this context, this research suggests an efficient com-pression technique based on Multi Resolution analysis (MRA). Experimental results dem-onstrate that the suggested technique provides sufficient high compression ratios with no appreciable degradation of image quality

Keywords:Image Compression, Surface Defects ,Multi-resolution Analysis (MRA).

Effet des parametres geometriques sur l'absorption de l'impact d'un panneau orthogrid

Hamamousse K1, Sereir Z1, Benzidane R1 1Laboratoire: Structures de Composites et Matériaux Innovants (LSCMI),

Département de Génie Maritime, Faculté de Génie Mécanique Université des Sciences et de la Technologie d'Oran Mohamed Boudiaf, BP 1505 El M’naouer, USTO, Oran, Algérie.

Abstract:Les matériaux composites ont connu un grand succès dans le domaine de la construction

surtout dans les structures avancées. Toutes les structures en question exigent le maximum de satisfaction au niveau des propriétés des matériaux utilisés. Dans les navires et les avions, la possibilité d’avoir des chocs ne peut pas être mise à l’écart au moment de la conception ainsi que la navigation d’une telle structure. Il est donc très important d'étudier et de tester les structures sous des chargements dynamiques. Un des objectifs est le déve-loppement des structures raidies améliorées pour les superstructures de navires à base de composites à renforts fibreux. Parmi les différents types de panneaux raidis dans une su-perstructure nous nous intéressons à des panneaux avec quatre raidisseurs. Ces structures ont été testées a une vitesse d’impact : 3 m/s. l’utilisation du logiciel Ansys nous a permis d’étudier le phénomène ,une validation a était faite avec ceux de la littérature en suite une variation l’épaisseur des raidisseurs et celle de la plaque a était faite en même temps sui-vant un pourcentage tout en conservant le même volume totale du panneau

Keywords:Collision, impact, panneau, force de contact.

Development of Methodology of Characterization of a Material by Nanoindentation

Habibi Samir1,*, Daikh Abdelkader2, Aminallah Laid1, AissaAbderrahmane1,

OuldChikh Bahri1

1Department of Mechanical Engineering, Mustapha Stambouli University, 29000 Mascara, Algeria. 2 Department of Hydraulics, Mustapha Stambouli University, 29000 Mascara, Algeria.

Abstract:This research work is part of a descriptive description of the sequentially appraised metho-

dology, to accompany the doctoral student to use the indentation tool as an alternative choice to the traditional tensile test. And he, clear this field of intervention for the imple-mentation of the indentation to characterize mechanically the different materials examined. This new non-destructive technique tends to miniaturize experimentally tested specimens, at very small sizes, and reach depths of penetration into the residual imprint caused by the indentation force, at the nanometer scale.

Keywords:methodology, indentation, characterization, manometer.

Etude ab-initio des propriétés structurales, électroniques et magnétique des composés semi-Heusler de type XYZ (NaCaB et NaCaC) avec la GGA et la TB-mBJ

BENABBOUN Radjaa1*, BOURADA Fouad2, MESRI Dalila1,3, TADJER Abdelkader3

Université Djillali Liabes, BP 89 Cité Larbi Ben M'hidi Sidi-Bel-Abbes 22000, 1Faculté des Sciences Exactes, Département de Matériaux et Développement Durable, Laboratoire de

la Matiére Condensée et Développement Durable, Sidi Bel Abbes, ALGERIE, 2 Institut de technologie, Département de génie civil centre universitaire Belhadj Bouchaib ain temou-

chent, ALGERIE, 3Faculté des Sciences Exactes, Département de Physique, Laboratoire de Modélisation et Simulation

en Science des Matériaux, Sidi Bel Abbes, ALGERIE, Résume :

La recherche sur les semi-conducteurs, ferromagnétiques et ferromagnétiques stables semi-métalliques reste une haute priorité dans la physique du solide. Une compréhension générale de la relation entre les propriétés est une condition nécessaire pour la conception de nou-veaux matériaux. Dans cette étude, les structures de bandes et les propriétés magnétiques des composées NaCaB et NaCaC dans la structure demi-Heusler ont été calculés avec la méthode des ondes linéaire augmentée avec potentiel total (FPLAPW) dans la théorie de la fonction-nelle de la densité de spin (DFT). Les calculs révèlent que l'élément non magnétique peut in-duire l’état ferromagnétique stable dans les métaux alcalins. Le plus stable arrangement ato-mique est quand les atomes des composées NaCaB et NaCaC occupent les positions (0, 0, 0), (1/ 4, 1/4, 1/4) et (3/4, 3/4, 3/4).

Mots clés :Composés Semi-Heusler, demi-métallique,FP-LAPW

Etude analytique de la flexion des poutres composites avec une fraction volumique vriable des fibres

A. Mouffoki1,, M. Sid Ahmed Houari2,A. Bessaim2,A.Tounsi1

1Université de Sidi Bel Abbes, LM&H, BP 89 Cité Ben M’hidi, Sidi Bel Abbes, Algérie 2Université de Mascara, Département de génie civil, Route de Mamounia 29000 , Mascara, Algérie.

Résumé:A travers ce travail, nous mettrons au point l’étude du comportement mécanique de la

flexion d’une poutre courte en matériaux composite avec une fraction volumique de fibres variable à travers l’épaisseur avec prise en compte de l’effet de cisaillement transverse, Plusieurs modèles seront utilisés avec ou sans prise en compte de l’influence du cisaille-ment transverse, Les équations du mouvement et les conditions aux limites sont obtenues par application du principe des travaux virtuels. Les solutions analytiques sont données pour les poutres simplement appuyées et les résultats obtenus par la présente analyse sont présentes et compares aux solutions existantes dans la littérature.

Mots clés: Théories des poutres, flexion des poutres composite, fraction volumique de fibres,

* Analysis of the thick beams

LemyaHanifiHachemi Amar1,ZAOUI Fatima Zohra2,AbdelhakimKaci3, AbdelouahedTounsi4

1 Water Resources and Environment Laboratory , University DrTaharMoulay of SAIDA ,BP 138 cite Nasr 20000 Saïda, Algeria

2Laboratoire de Modélisation Numérique et Expérimentale des Phénomènes Mécaniques (LMNEPM), Université Abdelhamid Ibn-Badis, Mostaganem, 27000, Algérie,

3 Water Resources and Environment Laboratory , University DrTaharMoulay of SAIDA ,BP 138 cite Nasr 20000 Saïda, Algeria

4 Material and Hydrology Laboratory, University of SidiBel Abbes, Faculty of Technology, Civil En-gineering Department, Algeria.

Abstract: In this work, a new theory of shear deformation trigonometry is developed for the static

analysis of thick isotropic beams. The number of variables used in this theory is identical to that required in the theory of ELEUR BERNOULLI ; sine function is used in the moving field. In terms of the coordinates of the thickness to represent the effects of shear deforma-tion. The advantage of this theory is that shear stresses can be obtained directly from the re-lationships constitute, while respecting the boundary conditions at the free surface level of the beam. Therefore; this theory avoids the use of shear correction coefficients. The diffe-rential equilibrium equations are obtained using the principle of virtual works. A thick iso-tropic beam is considered, whose numerical study to show the effectiveness of this theory.

Keywords:Thick beam, high order theory, virtual working principle, bending.

Analyse du comportement mécanique des plaques épaisses en matériaux à gradient de proprié-tés sous un chargement thermique

A. Bessaim2, A. Mouffoki1, Tarek Houari3, M. Sid Ahmed Houari2, A. Tounsi1

1Université de Sidi Bel Abbes, LM&H, BP 89 Cité Ben M’hidi, Sidi Bel Abbes, Algérie 2Université de Mascara, Département de génie civil, Route de Mamounia29000 , Mascara, Algérie.

3Département de Génie Mécanique, Université de Sidi Bel Abbes, BP 89 Cité Ben M’hidi 22000 Sidi Bel Abbes, Algérie

Résumé:Le comportement thermoélastique des plaques épaisses sandwiches FGM est étudié en utili-

sant une nouvelle théorie d’ordre élevé avec la prise en compte de l’effet « stretching ». Le nombre des inconnues dans la théorie proposée est seulement cinq, tandis que six ou plus dans le cas des autres théories déformation de cisaillement qui prennent en compte l’effet « stretching ». La théorie présentée est variationnelle, elle a une forte similitude avec la théorie classique des plaques dans de nombreux aspects, n'exige pas de facteur de correc-tion de cisaillement, et donne une description parabolique de la contrainte de cisaillement à travers l’épaisseur tout en remplissant la condition de contrainte de cisaillement nulle sur les bords libres de la plaque. Les résultats obtenus en utilisant la présente théorie et les autres théories de déformation de cisaillement d’ordre élevé sont identiques.

Mots clés: Matériaux à gradient de propriétés, théorie de déformation de cisaillement, plaques sand-wiches, comportement thermoélastique, effet stretching..

The behavior static of sandwich plates with FG faces

Hafida Driz1, Mamia Benchohra1, Yamina Chahraoui2 , Ahmed Bakora1, Abdelouahed Tounsi1,El

Abbes Adda Bedia1 , Abdelkader Benachour1

1Materiel and hydrology laboratory (LMH), university of Sidi Bel Abbes faculty of technology , civil Engineering Department, Algeria.

2LMPM, Mechanical Engineering Department, University of Sidi Bel Abbes, Algeria. Abstract:The importance of the two-parameter approach in linear elastic fracture mechanics analysis

is increasingly being recognized for fracture assessments in engineering applications. The consideration of the secondA novel higher shear deformation theory (HSDT) is proposed for the bendingof isotropic and functionally graded (FG) sandwich plates. It contains only four variables, which is even less than the first shear deformation theory (FSDT) and the conven-tional HSDTs. The model accounts for a parabolic variation of transverse shear stress, re-spects the traction free boundary conditions and contrary to the conventional HSDTs, the present one presents a novel displacement field which incorporates undetermined integral terms. Equations of motion determined in this work are applied for sandwich plates with FG faces. Analytical solutions are given to predict the transverse displacements, stresses of simp-ly supported plates.

Keywords: Bending; Sandwich plate; functionally graded materials; Plate theory.

3D FE analysis of the Elliptical Cracks emanating from interface in OrthopedicCement of the

THP

Ali Benouis1,2,a*, Mohammed El Sallah Zagane2,b, Mohamed Cherfi2,c,AbderahmenSahli2,d, Boualem-Serier2,e

1University of Saida, Bp 138 saida, 20000, Algeria 2LMPM, Djillali Liabes University of Sidi Bel-Abbes, Algeria

[email protected], [email protected], [email protected], [email protected], [email protected],

Abstract. In this study, the finite element method is used to analyse the crack behaviour in the ortho-

pedic cement of the total hip replacement by computing the stress intensity factors (SIFs) around the crack-tip. In this work, two loads are studied: static and dynamics loads, for an elliptical crack emanating from an interface cement-bone. The stress intensity factors under mixed mode at the crack-tip are calculated for different types of loading (from three activi-ties: - Normal walking, - climbing up stairs, - down stairs). The obtained results shows that the crack initiated from a micro-interface by an intense type of loading can damage the ce-ment, causes thus the loosening of the prosthesis.

Keywords:Cement;Implant; Elliptical crack; Stress intensity factors; Interface; dynamic.

Nanoindentation Applied to the Study of Metallic Materials

Habibi Samir1, OuldChikh Bahri1, Zaim Abdenour1

1Department of Mechanical Engineering, Mustapha Stambouli University, 29000 Mascara, Algeria

Résumé: To characterize the mechanical properties of the materials studied, nanoindentation tests were carried out. This new non-destructive technique tends to miniaturize experimentally tested specimens, at very small sizes, and reach depths of penetration into the residual im-print caused by the indentation force, at the manometer scale. The use of statistical analysis of the experimental results made it possible to graphically identify the Young's modulus, as a function of the stiffness and the contact area, according to the model of Oliver and Pharr (M.O.P).

Mots-clés : nanoindentation, Young's modulus, stiffness, M.O.P.

Simulation Numérique De L'écoulement Autour D'une HéliceSérie "B" B4-75

F. Bouregba1,, M. Belkadi1,M. Aounallah1

1Laboratoire-Hydrodynamique Naval(LAHN) USTO MB, BP 1505 El M’naouer, USTO, Oran, Algérie

*E-mail address:[email protected] Résumé:La présente étude traite l’écoulement turbulent autour des hélices marines appartenant à la

série B « Wageningen ». L’objectif est de déterminer les performances hydrodynamiques de ces hélices en eau libre pour différents pas d’avance. L’écoulement turbulent autour de l’hélice a été simulé numériquement en régime stationnaire par une approche RANS en uti-lisant le code commercial ANSYS FLUENT. Le domaine physique est constitué d’un canal inter-pale à frontières périodiques. Le maillage de type Tétra a été généré par le code Gam-bit. Le modèle de turbulence adopté est le k-ω standard. Les résultats numériques obtenus sont en bon accord avec les résultats expérimentaux[2]. Ils montrent que l’approche RANS peut être appliquée pour prédire le comportement hydrodynamique des hélices marines.

Mots Clés:Hélice série B, RANS, FLUENT, Performances

Analysis of reinforced concrete beams reinforced by composite materials

F. Benaoum1, 2, F. Khelil1, Z. Sereir3, A. Bennegadi3,A. Benhamena1 1LPQ3M laboratory, facult of Science and Technologies, University Mustapha Stambouli, Mascara,

29000, Algeria. 2Laboratory LABAB, National Polytechnic School of Oran, Algeria.

3Laboratoire des Structures de Composites et Matériaux Innovants (LSCMI) USTOBP 1505 El M'naouar, Oran, Algérie

Abstract-To ensure a relatively more ductile behavior for armed reinforced concrete elements, the

reinforcement technique for composite materials, causes a reduction in the ductility of elements reinforced by bending and without significant containment. Knowing that the ductility is a desirable element, the addition of the glass fibers could be considered as an alternative, since they are relatively more deformable and cheaper than the carbon fiber. In this sense, the present work aims to evaluate the effectiveness of external reinforcement on beams reinforced with fabric FRP (glass-carbon). Different reinforced concrete beams was strengthened in bending and shear, and loaded under bending load to four points in the static case.Fields stress and strain were evaluated digital "Ansys 14". The results were analyzed in terms of strength, stiffness, ductility and fracture mode. The study presented here was to make

a qualitative comparison between the different configurations of strengthening and particularly on their ductility. This technique reinforcement’s glued composite material is becoming increasingly important in the field of building structures.

Keywords:Reinforced concrete elements, glass fibers, carbon fiber, FEM, the ductility.

Flambement thermique des plaques non homogène en utilisant unenouvellethéoriededéforma-

tion

Taleb Ouahiba1 ,MouffokiAbderrahman1, Mahmoudi Abdelkader1,FahsiBouazza2,Benyoucef Samir1,Tounsi Abdeloauhed1,2.

1Laboratoire des Matériaux et Hydrologie, Université de Sidi Bel Abbes, Algérie, BP 89 Cité Ben M’hidi 22000 Sidi Bel Abbes.

2Laboratoire de Modélisation et Simulation Numérique Université de Sidi Bel Abbes, Algérie. RESUME:Dans ce travail, Une nouvelle théorie à cinq variables est présentée pour l’analyse de la

stabilité thermique des plaques fonctionnellement graduées.La présente théorie satisfait les conditions de la contrainte de cisaillement nulle au bord libre de la plaque, et les propriétés matérielles varient d’une façon continue à travers l’épaisseur de la plaque selon une loi de puissance. Les équations du mouvement pour des plaques rectangulaires fonctionnellement graduées sont obtenues en utilisant le principe de L'énergie potentielle totale. Des études paramétriques obtenues par la présente théorie seront présentées pour souligner l’effet des différents paramètres gouvernant la température critique de flambement.

Mots-clés :stabilité thermique, plaques, cisaillement.

Numerical simulation of the femur fracture for different cemented hip femoral prosthesis under

forces during stumbling

Mohammed El SallahZAGANE, Ali. BENOUIS, Abderahmen. SAHLI, Smail. BENBAREK

LMPM, Department of Mechanical Engineering, University of SidiBel Abbes, BP 89, City Ben M’hidi, SidiBel Abbes 22000, Algeria, [email protected]

Résumé : Prothèse totale de la hanche a été utilisé pour les patients qui a la fracture de la hanche et

incapable de récupérer naturellement. Pour concevoir des prothèses très durables, il faut te-nir compte des processus naturels qui se produisent dans l'os. Dans ce papier, l'analyse de charge statique est basée, en sélectionnant la charge de pointe pendant l'activité de trébu-chement. Deux matériaux d'implant différents ont été sélectionnés pour étudier le matériel approprié. Les résultats ont montré la différence du maximum de Von Misses et ont détecté la fracture du fémur pour différents modèles (Charnley et Osteal) avec la méthode des élé-ments finis étendus (X-FEM) et après les résultats de la simulation numérique de X-FEM pour différent a été utilisé dans la détermination des facteurs d'intensité de contrainte (SIF) pour identifier les matériaux d'implant de comportement de fissure pour différentes lon-gueurs de fissures. Il a été montré que les facteurs d'intensité de contrainte maximale ont été observés dans le modèle de Charnley.

Etude dynamique des structures à section en matériaux FGM reposant sur des fondations élas-tiques

Hafida Driz1, Salima Abdelbari1*, Hayet Saidi 1, AEKFekrar1, Abdelouahed Tounsi1,El Abbes Adda

Bedia1 , Abdelkader Benachour1

1Laboratoire (LMH) Materiaux et Hydrologie, Université de Sidi Bel Abbes, Faculte de Technologie, Département de Genie Civil, Algérie.

*Centre universitaire Belhadj Bouchaib –Ain Temouchent , Algérie. Résumé: Ce travail présente une nouvelle théorie de déformation pour analyser la vibration libre des

plaques FGM reposant sur des fondations élastiques. La théorie présentée est une théorie raf-finée de déformation de cisaillement transverse d’ordre élevé, Le modèle proposé contient un nombre réduit d'inconnues et considère des distributions hyperbolique des déformations de cisaillement à travers l’épaisseur tout en respectant la condition de contrainte de cisail-lement nulle sur les bords libres de la plaque sans introduire des facteurs de correction.

Mots clés: plaque FGM , fondation élastique, cisaillement, vibrations.

Prédiction numérique du champ dynamique d’un diffuseur à jet lobe

S. Nechad1,*, A. Khelil1, Y. Bouhamidi1, L. Loukarfi1

1University of Chlef,LCEMSM, Esalem City, 02000, Chlef, Algeria. Résume:Dans le présent travail, on s’intéresse à la simulation numérique d’un jet turbulent pour deux

types de diffuseur lobé, en vue son application de contrôle de l’écoulement sur les milieux réactives et au confort dans les locaux à usage d’habitation. L’objectif est l’amélioration de l’efficacité de diffusion de l’air, dans la zone de recirculation du mélange et la zone d’occupation, et étudiel’influence des modèles de turbulence SST k-ω et RSM (Reynolds stress model) sur la prédiction de l’ensemble des caractéristiques dynamiques de l’écoulement de jets lobés. Le diffuseur de la présente étude ayant des lobes à ouverture plus évasée et à faible hauteur a été également comparé avec d’autre diffuseur à jet lobe inclinée à la sortie d’ouverture.Ce dernier permet d’obtenir un bon mélange, et une nette homogénéisation d’ambiance. La simulation numérique utilise le logiciel commercial Fluent, basé sur la méthode des volumes finis.

. Mots clés:jet lobe, fluent, swirl, écoulement turbulent.

Modélisation par Abaqus du comportement d'un composite Epoxy/ SIC Endommagé par des

fissures matricielles inclinées

Y. Chahraoui1, M. Khodja1,2, B. Serier1,H. Fekirini1 1 Université de Sidi Bel Abbes, LMPM Département de génie mécanique, cité Arbi Ben Mehidi,

22000, SidiBel Abbes,Algerie 2CSIR Materials Science and Manufacturing, MeiringNaude Road Pretoria, 0184, South Africa

Résumé: Les matériaux composites sont largement utilisés dans l’industrie. La durabilité de tels ma-

tériaux dépend de leur mode d’utilisation. Ils sont généralement soumis à des chargements mé-caniques complexes. Leur mise en service et leur durée de vie nécessitent la connaissance de leur comportement en rupture, c’est l’objectif de cette étude. Dans cette étude, un modèle numérique a été développé pour étudier les effets du chargement appliqué dans des composites de matrice Epoxy renforcée par des fibres SIC. La technique des éléments finis a été utilisée pour calculer les facteurs d'intensité de contrainte pour la crois-sance des angles d’orientation dans les composites de matrice epoxy . Les influences de la charge appliquée sur les facteurs d'intensité de contrainte pour une fissure matricielle. Le but de cette étude est d’analyser la propagation de la fissure inclinée dans un matériau com-posite et leur comportement élastique .

Mots clés :composite époxy /SIC, fissure matricielle inclinée, facteur d’intensité des contraintes.

Simulation of turbulent flow in an unbaffled stirred tank driven by a curved turbine

M. Foukrach1, M. Bouzit1, 1Mechanical faculty of Engineering, USTO-MB 1505 EL M’naouar, Oran,Algeria.

Abstract:In this study, three types of turbines were tested: rushton turbine and two curved turbines

and also the effect of different heights between the bottom and turbine (the ratio c/D) for an unbaffled agitated vessel of inner diameter D=0.6 m equipped by a turbines with six blades. The simulations are carried out using the Rotating Reference Frame (RRF) approach. Present wok using computationally fluid dynamics (CFD) simulation, the turbulence model used is the k-ε standard type. Here, a CFD study has been performed to observe the axial, radial and tangential components velocities, contours speeds and power number. The nu-merically predicted results are compared with the experimental data available in the litera-ture. The good agreement validates the numerical method.

Keywords: Mixing, Turbulent Flow, Hydrodynamics, Power number, CFD, unbaffled vessel, Newto-

nian fluid.

L’effet de la forme du patch sur la qualité de la réparation des structures fissurées

N. Mahmoudi1, S. Hcini1, A. Benaoum1*, M. Bouanini2, B. Bachir Bouiadjra2 1Laboratoire Génie Industriel et Développement Durable, Centre Universitaire Relizane

2LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes

1Laboratoire Génie Industriel et Développement Durable Centre Universitaire Relizane

2LMPM, Department of Mechanical Engineering, University of Sidi Bel Abbes RESUME : Les patchs en matériaux composites sont classiquement utilisés dans l’aéronautique pour la

réparation des structures métalliques présentant des dommages de type fissures, criques ou im-pacts. Une alternative à la réparation de ces structures consiste à envisager un renfort extérieur avant que les défauts n’apparaissent. Le contexte de ce travail est celui de la maintenance cura-tif de structures métalliques aéronautiques par renforts composites, dans le but générale de re-tarder la propagation des fissures. La conception des renforts nécessite l’utilisation d’outils spécialises pour définir les caractéris-tiques optimales du patch : géométrie, nombre de plis unidirectionnels, orientation des plis les uns par rapport aux autres,... Dans ce travail nous avons intéressé par l’un des caractéristiques de la conception qui est la géométrie du renfort, pour cela la méthode des éléments finis sera utilisée pour déterminer la forme optimale du patch en composite pour la réparation des struc-tures aéronautique endommagées. Les critères du choix qu’on a traité sont le facteur d’intensité de contrainte en tête de la fissure qui détermine la performance de la réparation et les con-traintes dans l’adhésif qui détermine la durabilité de la réparation.

MOTS-CLES : réparation des fissures, patch composite, facteur d’intensité de contrainte, méthode des éléments finis.

Improvement of the Interfacial Adhesion Between Fiber and Matrix

N. Mahmoudi,A. Benaoum1

1Laboratoire Génie Industriel et Développement Durable, Centre UniversitaireRelizane, 48000

Abstract:In this work, the influence of carbon fiber surface treatment on mechanical properties of

unsaturated polyester was investigated. Two approaches have been used in the surface treatment; the first is the desizing of the carbon fiber by the release of the epoxy layer. The second is with the release of epoxy layer and etching the fibers. It was concluded that both methods give good results on adhesion between the matrix and the fibers. It is found that

the treatment of carbon fibers is efficient and greatly improves the CFRP handress. The tensile strength of composite materials increases by 30% for etched carbon fibers compared to untreated carbon fibers.SEM images confirm the results obtained.

Keywords:carbon fibers, Surface treatment, desizing, Mechanical properties.

AN APPROACH TO OPTIMIZE GTAW WELDING PARAMETERS BY USING DESIGN

OF EXPERIMENTS TO REDUCE THE EFFECT OF STRESS CORROSION

Belkacem Amine KESSAL 1, Chahinez FARES 2

1Laboratory for theoretical physics and material physics (LPTPM); Department of Chemistry, Faculty of Sciences, Hassiba Ben Bouali University,B.P. 151, 02000 Chlef, Algeria.

2Laboratory for theoretical physics and material physics (LPTPM); Department of Process Engineer-ing, Faculty of Technology, Hassiba Ben Bouali University,B.P. 151, 02000 Chlef, Algeria.

Author mail:[email protected]

Abstract: The stress corrosion cracking (SCC) at weld joint is greatly defined by the input parameters used in the welding process. All the corrosion parameters such as corrosion current, corro-sion potential and residual stresses …etc are depends on the input welding parameters and defined the quality of the weld-joint. So selecting the right parameters at optimum level sa-tisfies the desired output. This paper presents an experimental design approach to process parameter optimization of Gas Tungsten Arc Welding (GTAW) of the 304L austenitic stainless steelusing a standard 308L electrode. A mathematical model based on Factorial Design approach is developed to find the relationship between the various welding process parameters: Number of pass, gas flow (argon flow) and welding current, etc. The susceptibility to stress corrosion cracking of the welded specimens is studied for varying inputs parameters. The percentage contribu-tion of each parameter and the prediction of corrosion damage are found by variance analy-sis technique.

Keywords: Full Factorial Design (FFD); Optimization; Gas Tungsten Arc Welding (GTAW); Corro-

sion resistance; stress corrosion.

Comportement des Aciers en Milieu Hydrogène

N. Benaoum,N. Mahmoudi1, A. Aboura1, Y. Ibaliden1

1Laboratoire Génie Industriel et Développement Durable, Centre Universitaire Relizane, BourmadiaRelizane48000

2Département de Génie mécanique, Faculté Sciences et technologie Université de mascara 29000

Abstract: Dans ce présent travail, nous avons étudié l’effet de l’hydrogène sur le comportement

tribologique d’un revêtement anti usure pour différents temps de chargement en hydro-gène et différentes duretés. Les tests d’usure ont été effectués à l’aide d’un dispositif mé-canique garantissant le contact permanent des échantillons sur un acier brut de coulée et sous une charge de 120N. Les résultats obtenus ont montré que la perte de masse est proportionnelle à l’augmentation de la durée d’usure, la concentration de l’hydrogène au sein de l’échantillon et l’augmentation de la dureté du revêtement anti-usure.

Mots-Clés : Nitruration ; Revêtement anti-usure ; Hydrogène ; Aciers inoxydables

A Higher-Order Shear Deformation Theory for Dynamic Behavior Analysis of Advanced Com-posite Beams

ZAOUI Fatima Zohra*1, ISSAD Mohamed Naim2, AHOUAL Mamia2, ABU ALNOUR Moussa2,

TOUNSI Abdelouahed2, OUINAS Djamel1

1Laboratoire de Modélisation Numérique et Expérimentale des Phénomènes Mécaniques (LMNEPM), Université Abdelhamid Ibn-Badis, Mostaganem, 27000, Algérie,

2 Laboratoire des Matériaux et Hydrologie (LMH), Université DjillaliLiabes, Sidi bel Abbès, 22000 Algérie

Abstract:This paper presents an analytical solution to the free vibration analysis of functionally

graded beams by using a refined hyperbolic shear deformation theory in which the stret-ching effect is included. The modulus of elasticity of beams is assumed to vary according to a power law distribution in terms of the volume fractions of the constituents. Equations of motion are derived from Hamilton’s principle and Navier-type analytical solutions for simply supported beams are compared with the existing solutions to verify the validity of the developed theory. Numerical results are obtained to investigate the effects of the pow-er-law index and side-to-thickness ratio on the natural frequencies.

Keywords:analytical modelling, beam theory, functionally graded material, natural frequencies, stretching effect.

Analyse de flambement des plaques isotropes

KLOUCHE Faiza1,HANIFI HACHEMI AMAR Lemya2 , SAHRAOUI Amel3,TOUNSI Abdeloua-

hed4 1 Laboratoire de Construction Transport et Protection de l'Environnement ( LCTPE), Université Ab-

delhamid Ibn Badis de Mostaganem, BP 188/227 Mostaganem 27000,Algérie [email protected]

2Laboratoire des Ressources Hydriques et Environnement, Université Dr Tahar Moulay de Saida, BP 138 Cité Nasr 20000 Saïda, Algérie

3 Laboratoire Mécanique des Structures (LMS), Université Tahri Mohamed de Béchar,BP 417 Route Kenadsa 08000 Béchar, Algérie

4Laboratoire des Matériaux et Hydrologie (LMH), Université DjillaliLiabès de Sidi Bel Abbès, BP 89 Cité Ben Mhidi 22000 Sidi Bel Abbès, Algérie

Résumé:Dans ce travail, une théorie exponentielle de déformation de cisaillement est développée

pour l’analyse du flambement des plaques isotropes épaisses. Cette théorie nécessite seu-lement une seule variable, contrairement aux autres théories d’ordre élevé, qui utilisent un nombre important de variables. La présente théorie considère une distribution non linéaire des déformations de cisaillement transverse à travers l’épaisseur et satisfait les conditions de la contrainte tangentielle nulle au niveau des surfaces supérieures et inférieures de la plaque, sans introduire les coefficients de corrections de cisaillements. Les équations d’équilibres de la présente théorie sont obtenues, en utilisant le principe de travail virtuel. Des plaques carrées isotropes épaisses sont considérées dans l’étude numérique. Des solu-tions analytiques pour l’analyse du flambement des plaques carrées sont obtenues. Les ré-sultats déterminés à partir de la présente théorie sont validés et comparés avec d’autres théories connues de la littérature.

COMPARING THE BUTT WELDING AND WELDING FSW FOR HIGH DENSITY POLYTYLENE (HDPE)

Mustapha KAID1, Mokhtar ZEMRI2

1LMSR Laboratoire de Matériaux et Systèmes Réactifs Ain El Berd, Sidi Bel Abbes, ALGERIA. 2LMSR Laboratoire de Matériaux et Systèmes Réactifs, Sidi Bel Abbes, ALGERIA

Abstract :The Objective Of This Thesis Is The Mastery Of The Technique Of Friction Stir Welding (Fsw) And Parameter Optimization On A High-Density Polyethylene (Hdpe). This Assembly Method Is Based On The Phenomenon Of Mixing Caused By The Passage Of The Tool (Pin), A Key Element Of This Technique. The Work Will Include: 1. Perform Welding By Fsw Process. 2. Studying Me-chanical Fracture Behavior Of Welded Joints. In Order To Control And Optimize The Process By Mastering The Rotational Speed, Advance And Diving Of The Tool.3. Achieve Butt Welds And Make A Comparison Between The Two Welds

Analyse du Comportement Mécanique des Structures Endommagées par Fissuration

A. Daikh1, L. Aminallah1, L. Gaidi2, A. Aid1, S. Zengah1

1Laboratoire de Physique Quantique de la Matière et Modélisations Mathématiques (LPQ3M), Université

Mustapha Stambouli de Mascara, Route de Mamounia, BP.305, 29000 Mascara, Algérie. 2 Université Mustapha Stambouli de Mascara, Route de Mamounia, BP.305, 29000 Mascara, Algérie.

Abstract: Les exigences sécuritaires dans le monde industriel incitent à une connaissance

toujours plus approfondie du comportement et de la rupture des matériaux utilisés. L'étude de la prévision de la tenue des structures fissurées nécessite le calcul du taux de restitution d’énergie ou le facteur d’intensité de contrainte (FIC) en pointe de la fissure. Ce travail a permis d’étudier les différents paramètres qui intervien-nent en même temps, pour expliquer les phénomènes de la fissuration afin de dé-velopper une méthode d'analyse. Dans cette étude nous avons analysés numéri-quement l’influence de l’angle d’inclinaison de la fissure sur le facteur d’intensité de contrainte (FIC), et nous avons aussi traité l’influence de la nature des maté-riaux sur la taille de la zone plastique.

Keywords: facteur d’intensité de contrainte, MEF, mode mixte, fissure, zone plastique.

Analyse Numérique des Contraintes Résiduelles dans les Jonction Céramique/Métal

L. Aminallah1, A. Aid1 , S. Habibi2, A. Daikh1, A. Benhamena1, S. Zengah1

1Laboratoire de Physique Quantique de la Matière et Modélisations Mathématiques (LPQ3M), Université Mustapha Stambouli de Mascara, Route de Mamounia, BP.305, 29000 Mascara, Algérie.

2 Université Mustapha Stambouli de Mascara, Route de Mamounia, BP.305, 29000 Mascara, Algérie.

Abstract: Dans ce présent travail, l’analyse des contraintes résiduelles dans la jonction Céra-mique-Métal élaborée à l’état solide par thermocompresion sont analysées numéri-quement par la méthode des éléments finis en trois dimensions. Ces contraintes sont évaluées à l’interface et à son voisinage proche suivant tous les directions. L’intensité et la répartition de ces contraintes dépendent des propriétés physiques et mécaniques des deux matériaux conjointement liés. La durabilité de ces bimatériaux et leur mise en service dépendent de niveau et de la distribution de ces contraintes et leur détermination est d’une grande importance.

Keywords: contraintes résiduelles, jonction céramique-métal, M.E.F.

Résistance au Rayage de la Peinture des Véhicules dans des Milieux Agressifs

Z. MADAOUI 1, *, H. ZAHLOUL 2

1Université de Chlef, Hay Esalem City, 02000, Chlef, Algérie.

2Université de Chlef, LRM, Hay Esalem City, 02000, Chlef, Algérie.

Résumer: Ce papier présente une étude du comportement au rayage des peintures des véhicules affec-

tés par un milieu saharien agressif pendant certain temps. Des essais de rayage sont réalisés afin d’étudier l’adhérence des couches de peintures sur son substrat. Une visualisation par Microscope Electronique à balayage (MEB) est utilisée dans la discussion des résultats ob-tenus. Les résultats montrent que la résistance au rayage des peintures change avec le temps d’exposition aux effets des Ultraviolets (UV) et le gradient de températures dans ces milieux agressifs. Il a été trouvé qu’aux premières années d’utilisation, la résistance au rayage des couches de peintures augmente pour atteindre des valeurs maximales, et à partir d'une durée de 5 années d’utilisation, cette propriété se trouve diminue.

Mots clés: Rayage ; Peintures ; Polymère ; Milieux agressifs ; Véhicules.

EFFICIENCY OF GREEN INHIBITORS AGAINST CORROSION IN

HYDROCHLORIC ACID ON MECHANICAL PROPERTIES OF PIPE STEEL API 5L X52

SOUDANI Mohamed1, M. Hadj Meliani1,2, El-Miloudi Khaled1, BOULEDROUA Omar1

C.Fares1,M.A.Benghalia1 1University of Chlef, LPTPM, Esalem City, 02000, Chlef, Algeria.

2Université Paul Verlaine of Metz, LaBPS-ENIM, île de saulcy 57045,Metz , France. Abstract: The impact of environment can cause many types of degradations such as pitting corrosion,

stress corrosion cracking and sulphide stress cracking of metal structures and one of the se-rious problems of oil extracting industry is the corrosion process. Recently there were num-ber of assets failures, caused by internal corrosion, recorded in oil and gas industry, the re-ports confirmed that the failures were due to the effect of traces HCl . Our objectives are to use the plant extracts, such as corrosion inhibitors. Indeed, these natural extracts contain many families of natural organic compounds "Green", readily available and renewable. The mechanics tests carried out on this study of anti-corrosive properties of natural products of plant origin will be to given so far promising results on the fracture mechanics properties. The importance of this area of research is mainly related to the fact that natural products can replace toxic organic molecules present condemned by the world directives for environmen-tally unacceptable.

Keywords: Corrosion, Green Inhibitors, Failure, Fracture Mechanics, Pipelines, API 5L X52.

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