abaqus cae impact tutorial
DESCRIPTION
Impact With Rigid TutorialTRANSCRIPT
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2013 Hormoz Zareh 1 Portland State University, Mechanical Engineering
AbaqusCAE(ver.6.12)Impacttutorial
ProblemDescription
Analuminumpartisdroppedontoarigidsurface.Theobjectiveistoinvestigatethestressanddeformationsduringtheimpact.
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2013 Hormoz Zareh 2 Portland State University, Mechanical Engineering
AnalysisSteps1. StartAbaqusandchoosetocreateanewmodeldatabase2. InthemodeltreedoubleclickonthePartsnode(orrightclickonpartsandselectCreate)
3. IntheCreatePartdialogbox(shownabove)namethepartBracket
a. Select3Db. SelectDeformablec. SelectSolidd. Setapproximatesize=200e. ClickContinue
4. Createthegeometryshownbelow(notdiscussedhere).Dimensionsareinmillimeters.a. Extrudetheshapetoadepthof20.
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2013 Hormoz Zareh 3 Portland State University, Mechanical Engineering
5. IntheCreatePartdialogbox(shownabove)namethepartRigida. Select3Db. SelectAnalyticalrigidc. Setapproximatesize=200d. ClickContinue
6. Createthegeometryshownbelow(notdiscussedhere).Dimensionsareinmillimeters.
a. Settheextrusiondepthto200mm.
7. Createadatumpointatthecenteroftheplate(midwaybetweendiagonalpoints).
8. FromthemenubarselectToolsReferencePoint
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2013 Hormoz Zareh 4 Portland State University, Mechanical Engineering
a. Selectthedatumpointjustcreated.b. Thereferencepointwillbecreatedas
shown.
9. Createasurfaceontherigidplate.a. ClickontheToolsSurfaceCreateb. Selecttherigidplate.c. Youwillbepromptedtopickasideforinternalfaces.Pickthecolorthatis
likelycandidateastheimpactsurface.Inthisexample,Brownhasbeenselected.
10. DoubleclickontheMaterialsnodeinthemodeltree
a. NamethenewmaterialAluminumandgiveitadescriptionb. ClickontheMechanicaltabElasticityElasticc. DefineYoungsModulusandthePoissonsRatio(useSI(mm)units)
i. Youngsmodulus=70e3,Poissonsratio=0.33d. Sincethisisanexplicitmodel,materialdensitymustalsobedefinede. ClickontheGeneraltabDensity
i. Density=2.6e6f. ClickOK
AFNote Erreur c'est 2.6e-9;
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2013 Hormoz Zareh 5 Portland State University, Mechanical Engineering
11. DoubleclickontheSectionsnodeinthemodeltreea. Namethesectionbracket_secandselectSolidforthecategoryandHomogeneousforthetypeb. ClickContinuec. Selectthematerialcreatedabove(Aluminum)andClickOK
12. ExpandthePartsnodeinthemodeltree,expandthenodeofthepartBracket,anddoubleclickon
SectionAssignmentsa. SelecttheentiregeometryintheviewportandpressDoneinthepromptareab. Selectthesectioncreatedabove(bracket_sec)c. ClickOK
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2013 Hormoz Zareh 6 Portland State University, Mechanical Engineering
13. ExpandtheAssemblynodeinthemodeltreeandthendoubleclickonInstancesa. SelectDependentfortheinstancetypeb. Selecttheparts:Bracketandrigidc. SelectAutooffsetfromotherinstancesd. ClickOK
14. Now,rotatethebracketsothattheimpactwilloccuratthelowerrightcorner.Thiswillbaaccomplishedbyrotatingtheobjectfirstwithrespecttothezaxisfollowedbyrotationaboutxaxis.
a. SelectRotateInstanceicon.b. SelecttheBracketc. Acceptthedefaultvaluesofstartingpoint(0,0,0)bypressingEnterd. Enter(0,0,1)fortheendpointofrotationaxis.e. Enter15(degrees)forAngleofRotation.
Theassemblyshouldlooksimilartothescreenshotbelow.BesuretoconfirmthefinalrotatedpositionbyclickingonOKatthepromptregion!
15. Now,rotatethebracketaboutthexaxis.a. SelectRotateInstanceicon.b. SelecttheBracketc. Acceptthedefaultvaluesofstartingpoint(0,0,0)bypressingEnterd. Enter(1,0,0)fortheendpointofrotationaxis.e. Enter15(degrees)forAngleofRotation.Besuretoconfirmthefinalrotatedpositionby
clickingonOKatthepromptregion!
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2013 Hormoz Zareh 7 Portland State University, Mechanical Engineering
Theassemblyshouldlooksimilartothescreenshotbelow.
16. InthetoolboxareaclickontheTranslateInstanceicona. SelecttheBracketgeometry,clickDoneb. Selectthebottomcornerofthebracketasshown.c. SelectthereferencepointontheRigidmemberastheendpoint.d.
ClickOk
e. Thecompletedassemblyshouldnowlooklikeisshownbelow.
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2013 Hormoz Zareh 8 Portland State University, Mechanical Engineering
17. DoubleclickontheStepsnodeinthemodeltreea. Namethestep,settheproceduretoGeneral,selectDynamic,
Explicit,andclickContinueb. OntheEditSteppageundertheBasictab,setthetime
periodto0.02seconds.
18. DoubleclickontheBCsnodeinthemodeltreea. Nametheboundaryconditionfix_rigid_plateandselect
Symmetry/Antisymmetry/Encastreforthetype.b. SelectthereferencepointonthebracketgeometryandclickDonec. SelectENCASTREfortheboundaryconditionandclickOK
19. OpenFieldOutputRequestsnodeinthemodeltree
a. DoubleclickontheFOutput1.b. ChangethevalueofIntervalto100.Thisallowsfor
capturingofmoreoutputincrementssothatimpactcanbebettervisualized.
c. YoumaywishtoalsochangetheHistoryoutputRequeststoallowforbetterresolutionofhistoryoutputplots.
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2013 Hormoz Zareh 9 Portland State University, Mechanical Engineering
20. SelecttheCreatePredefinedFieldiconundertheLoadmodule.a. Namethepredefinedfield.b. PullldownInitialstepundertheStepselection(seefigure).c. SettheCategorytoMechanicalandbesureVelocityisselected.d. Notethepromptregionasksyoutoselecttheregions.
e. Rotatetheimageonthescreensothatthebracketcanbehighlighted.Besuretherigidplateisnotselected!
f. ClickDoneinthepromptregion.g. Whenprompted,Enter500[mm/s]intheV2fieldoftheEditPredefinedFieldwindow.The
velocityvectorsshouldnowbedisplayedonthescreen.
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2013 Hormoz Zareh 10 Portland State University, Mechanical Engineering
21. DoubleclickontheInteractionPropertiesnodeinthemodeltreea. NametheinteractionpropertiesandselectContactforthetype,clickContinue
b. OntheMechanicaltabSelectTangentialBehavior
i. SetthefrictionformulationtoPenaltyii. SetFrictionCoefficientto0.5
c. OntheMechanicaltabSelectNormalBehaviord. Acceptdefaults,
ClickOK
22. DoubleclickontheInteractionsnodeinthemodeltreea. Nametheinteraction,selectGeneralContact(Explicit)
(Explicit)andclickContinueb. SelectAll*withselfontheEditInteractionsWindow.c. Besuretoassigntheappropriateinteractionpropertyunder
GlobalPropertyassignmentintheContactPropertiestabofthewindow.
d. Changethecontactinteractionpropertiestotheonecreatedabove(ifnotalreadydone)
e. ClickOK
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2013 Hormoz Zareh 11 Portland State University, Mechanical Engineering
23. OpentheFieldOuput1andchangetheIntervalfortheoutputrequestto100.
24. InthemodeltreedoubleclickonMeshfortheBracketpart,orusetheModulesectionoftheiconpanelasshown.
a. SelectExplicitforelementtypeb. SelectQuadraticforgeometricorderc. Select3DStressforfamilyd. SelectTettabandbesuretheelementisC3D10Me. SelectOK
YoumaychecktheMeshControltobesureonlyTETelementsarebeingusedinmeshing.
25. InthetoolboxareaclickontheSeedParticon
a. UnderSizingControlssetApproximateglobalsizeto2,ClickOK
26. InthetoolboxareaclickontheMeshParticon
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2013 Hormoz Zareh 12 Portland State University, Mechanical Engineering
a. ClickYes
Caution:Themeshwillexceedtheabilityofstudentversionofthesoftwaretosolve.YouneedtouseeitherAcademicversionortheResearchversiontobeabletorunthejob.
27. InthemodeltreedoubleclickontheJobnode
a. Namethejobb. Givethejobadescription,clickContinuec. Acceptdefaults,clickOK
28. InthemodeltreerightclickonthejobjustcreatedandselectSubmit
a. WhileAbaqusissolvingtheproblemrightclickonthejobsubmitted,andselectMonitorb. IntheMonitorwindowcheckthattherearenoerrorsorwarnings
i. Ifthereareerrors,investigatethecause(s)beforeresolvingii. Iftherearewarnings,determineifthewarningsarerelevant,somewarningscanbesafely
ignored.Anexampleisinformationwarningmessagebelow:Theoption*boundary,type=displacementhasbeenused;checkstatusfilebetweenstepsforwarningsonanyjumpsprescribedacrossthestepsindisplacementvaluesoftranslationaldof.Forrotationaldofmakesurethattherearenosuchjumps.Alljumpsindisplacementsacrossstepsareignored
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2013 Hormoz Zareh 13 Portland State University, Mechanical Engineering
29. Inthemodeltreerightclickonthesubmittedandsuccessfullycompletedjob,andselectResults30. 31. Toseetheeffectofimpact,youcaneitheranimatethedeformedshape,orstepthrougheachtimestepof
thesolution.Herethestepbystepmethodisdiscussed.a. Inthetoolboxareaclickonthefollowingicons
i. PlotContoursonDeformedShapeii. SwitchtotheFirststepofthesolution.iii. ClickontheNextstep.iv. Repeatafewtimesandobservethechangeinthestresscontours,and
alsobesurethecontactdoesnotextendintotherigidsurface.YouallalsonoticethattheBracketwillstarttoseparatefromtherigidplate!
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2013 Hormoz Zareh 14 Portland State University, Mechanical Engineering
32. Youmayalsowishtoseethebehaviorofthesystemenergy,specificallymakingsuretheartificialstrainenergyisnotasubstantialpercentageoftheoverall(Internal)energyofthesystem.
a. ClickontheCreateXYDataicon.b. BesuretheSourceisODB
HistoryoutputthenclickContinue
c. HoldtheCTRLkeyandselecttheenergytermsyouwishtoplot.IN theexamplebelowInternalandArtificalenergy termshavebeenselected.
YoullnotethatArtificialEnergyisaverysmallportionoftheoverallInternalEnergy,thusthemodelseemstobevalid,atleastfromthestandpointofelementbehaviorandpossibilityoferrorsduetomeshing.