April 2004 MACHINE ELEMENTS & TRIBOLOGY 1/14

POLYTECHNIC UNIVERSITY OF BUCHAREST

MACHINE ELEMENTS & TRIBOLOGY

(OMTR)

CG Building - Spl. Independentei 313, 060042 Bucharest

www.omtr.pub.ro

April 2004 MACHINE ELEMENTS & TRIBOLOGY 2/14

UPB

Faculty of Mechanical Engineering

(FIM)

12 Faculties in UPB

Department of

MACHINE ELEMENTS AND TRIBOLOGY

HEAD: Prof. Mircea D. PASCOVICI

7 Professors (5 PhD advisors)

14 Associate Professors

7 Assistant Professors (Lecturers)

4 Assistants

6 + 12 PhD students

2 Technicians + 2 Secretaries

6 Departments in FIM

April 2004 MACHINE ELEMENTS & TRIBOLOGY 3/14

CENTRE FOR EXCELLENCE IN MECHANICAL ENGINEERING AND TRIBOLOGY

CNCSIS - ACCREDITATION

Chairman: Prof. Mircea D. PASCOVICI

Executive Manager: Assoc. Prof. Adrian PREDESCU

Research

LABORATORIES (Teams)

Tribology

Mechanical transmissions

Computer assisted mechanical engineering

Department of

MACHINE ELEMENTS AND TRIBOLOGY

HEAD: Prof. Mircea D. PASCOVICI

Education

Undergraduate courses inMachine elements and Mechanisms

Tribology

Management in Mechanical Engineering

IT basis for Mechanical Engineering

Postgraduate courses for

CAD-CAE in Mechanical Engineering

Biomedical Engineering

April 2004 MACHINE ELEMENTS & TRIBOLOGY 4/14

Thermo-hydro-dynamic lubrication studies with application to various machine elements

LUBRICATION

Viscous Dampers & Vibrators

Viscous Pumps

Hydrodynamic Bearings Seizure, Optimal filter size, Oil contamination

Viscous Couplings Thermal transients regime for automotive transmissions

Seals (Mechanical Face Seals, Brush Seals)

TEHD Instabilities, Phase change Temperature measurements by infrared Thermography (LMS-Poitiers)

IR CameraImage processing unit

Thermocouple

Feeding arm

Bellows

Stator

Rotor

Mirror

Mirror

CarbonRotor

FluorineStator

Infraredcamera

ReferenceBlack Target

TRIBOLOGY Laboratory

April 2004 MACHINE ELEMENTS & TRIBOLOGY 5/14

LUBRICATION OF TEXTURED SURFACES

ua

Rigid Disc

Fluid

W

V

R

hg

hh0

r dr

h

hp

he

Porous &elastic layer

Rigid support

LUBRICATION OF CONFORMAL, LAYERED, COMPLIANT AND POROUS CONTACTS

TRIBOLOGY Laboratory

April 2004 MACHINE ELEMENTS & TRIBOLOGY 6/14

Test rigs

TIMKENLinear contact machine

CSM-CALOWEAR & PLINT TE-66Spherical abrasion tester

AMSLERTwo roller machine

MYTUTOYO Roughness measurement

Stick-slip machine

Four ball machine

Research subjects

•Friction and wear processes and phenomena

•Tribological properties of coating materials

•Mechanical properties of lubricants

•Reliability and durability of mechanical components

•Tribology of human joint replacements

•Tribological behaviour of materials in dry and boundary

friction

TRIBOLOGY Laboratory

April 2004 MACHINE ELEMENTS & TRIBOLOGY 7/14

Tribology of human joint replacements

TRIBOLOGY Laboratory

April 2004 MACHINE ELEMENTS & TRIBOLOGY 8/14

TRIBOLOGY Laboratory

USA

Universities fromPITTSBURGH, CARBONDALE

& BATON ROUGE

Prof. Michael M. KHONSARY

ISRAEL

TECHNION - Israel Institute of Technology

Prof. Itzak ETSION

JAPAN

University ofKOBE

Prof. T. IWATSUBO

FRANCE

Laboratoire de Mecanique et AcoustiqueUniv. de la Mediteranee Aix-MarseilleProf. Patrick CHABRAND

Laboratoire de Mecanique des SolidesLMS- Universite de Poitiers

Prof. Jean FRENE Prof. Dominique Bonneau (Angouleme)

Tribology Laboratory

April 2004 MACHINE ELEMENTS & TRIBOLOGY 9/14

MECHANICAL TRANSMISSIONS

RELIABILITY AND DURABILITY

VIBRATION AND NOISE

Gears and gearboxes Measurements & Analyses

Solutions for noise reduction

LOAD CAPACITY

Gears, couplings Theoretical studies

Experimental studies

PRODUCT DEVELOPMENT

Various machine elements Damage accumulation model

Real loading model

Modeling S-N (Wöhler) curves

International cooperation

COPERNICUSSCOPES

Belgium

Italy

Hungary

Slovenia

Switzerland

Various machine elements Flexible product development

April 2004 MACHINE ELEMENTS & TRIBOLOGY 10/14

2 fzF=1200

2 fzF + faI = 1230

2 fzF - faI = 1170 fzF + faI = 630

920

2 fzIII = 640

1075

fzF = 600

fzIII = 320

faI = 28,8

2 faI = 57

3 faI = 88

1000 1500 500 0 f [Hz]

Acc

élér

atio

n re

lativ

e de

s vi

brat

ions

(lo

g) a

Vibration spectrum at gearbox AK6

N2

1

2

3

4

5

4

3

2

5

1

S-N curves

t N1 N4 N' 1 N' 3 N' 2 N3 N5 n

Damage accumulation process

800 750

700

650 600 6

550

500

450 400

2·104 105 106 5·106 107 N[cicluri]

Flim

[MP

a]

Pr=10% Pr=50%

Pr=90%

Experimental S-N (Wöhler) curves

Buckling analysis at membrane flexible couplings

MECHANICAL TRANSMISSIONS

April 2004 MACHINE ELEMENTS & TRIBOLOGY 11/14

Modern telemetry system for measurement vibrations and real loading

Modern system for performing real-time noise analysis (B & K 2260 Observer)

Modern equipments

MECHANICAL TRANSMISSIONS

April 2004 MACHINE ELEMENTS & TRIBOLOGY 12/14

Hardware

38 PC (P-III & P-IV)

Colour Plotter

SmartBoard

Mechanical Engineering software

I-DEAS AutoCAD

CADdy ADAMS

COSMOS FLUENT

MathCAD Visual C

Computer assisted mechanical engineering

April 2004 MACHINE ELEMENTS & TRIBOLOGY 13/14

Nonlinear FE modelling of interference joints

Computer assisted mechanical engineering

April 2004 MACHINE ELEMENTS & TRIBOLOGY 14/14

Electronic packaging Cooling modelling of personal computers

Computer assisted mechanical engineering