AbaqusCAECONTW05QInterfFitWord文件下载.docx
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2.Runthescriptws_contact_interf.pyusingthefollowingcommand:
abaquscaestartup=ws_contact_interf.py.
TheabovecommandcreatesanAbaqus/CAEdatabasenamedcirc-rings.caeinthecurrentdirectory.Thegeometry,mesh,andmaterialdefinitionsareincludedinthemodel.Youwilladdthenecessarydatatocompletethemodel,runthejob,andfinallypostprocesstheresults.
ConfiguringtheAnalysis
Theanalysisconsistsoftwogeneralstaticsteps.Thestepswillconsidergeometricnonlinearity.Inthefirststeptheinterferencefitwillberesolved;
inthesecondstep,theinnerringwillberotated360º
whiletheouterringremainsfixed.
Tocreategeneral,staticanalysissteps:
1.IntheModelTree,double-clickSteps.
2.IntheCreateStepdialogbox:
a.Fromthelistofavailablegeneralprocedures,selectStatic,Generalifitisnotalreadyselected,andclickContinue.
3.IntheEditStepdialogbox:
a.IntheBasictabbedpage,toggleonNlgeom.
b.Enterthefollowingdescription:
resolveinterferencefit.
c.SwitchtotheOthertabbedpageandchoosetheUnsymmetricmatrixstoragescheme.(Theunsymmetricsolverisrecommendedforgeneralcontact.)
d.ClickOKtocreatethestep.
4.Createasecondgeneralanalysisstep:
a.Enterthefollowingdescription:
rotateinnerring.
b.SwitchtotheIncrementationtabbedpageandsettheinitialincrementsizeto0.05.
c.ClickOKtocreatethestep.
Definingcontactproperties
Frictionlesscontactisassumedbetweentheparts.Usethepenaltyconstraintenforcementmethodwiththedefaultpenaltystiffness.
5.IntheModelTree,double-clickInteractionProperties.
a.NamethepropertynoFricandselectContactasthepropertytype.
b.Inthecontactpropertyeditor,selectMechanical→NormalBehavior.
c.SelectPenaltyastheconstraintenforcementmethod.
Part1:
Analysiswithsurfacesmoothing
Thefirstanalysisinthisexerciseconsiderstheeffectsofsurfacesmoothingonthesolution.Heregeneralcontactwillbeusedwithanon-defaultcontactinitializationsettingsothatinitiallyoverclosednodesaretreatedasinterferencefits.
Beginbydefiningthegeneralcontactdefinition.
6.IntheModelTree,doubleclickInteractions.
7.IntheCreateInteractiondialogbox,nametheinteractiongcandselecttheInitialstep.
a.SelectGeneralcontact(Standard)asthetypeandclickContinue.
b.IntheEditInteractiondialogbox,selectnoFricfromthelistofavailableGlobalpropertyassignmentoptions.
c.Intheinteractioneditor,clickCreatenexttoInitializationassignments.
d.IntheEditContactInitializationdialogboxthatappears,namethepropertyfit-1.IntheInitialOverclosuresregionofthedialogbox,selectTreatasinterferencefits,asshowninFigureW5–2.
e.ClickOKtoaccepttheselectionandclosethecontactinitializationeditor.
FigureW5–2.Contactinterferenceoption
8.Intheinteractioneditor,clickEditnexttoInitializationassignments.Selectthesurfacepairsthatwillbeadjusted,asindicatedinFigureW5–3.Notethatafterselectinganitemineachcolumnontheleftsideofthedialogbox,youwillneedtoclick
inordertoaddtheselectionstothetableontherightsideofthedialogbox.
Thisassignmentwillcauseallinitiallyoverclosednodestoberesolvedusinganinterferencefit.
FigureW5–3Initializationtable.
9.ClickOKtoaccepttheselectionsandclosetheinitializationassignmenteditor.
10.Intheinteractioneditor,switchtotheSurfacePropertiestabbedpage.ClickEditnexttoSurfacesmoothingassignments,asshowninFigureW5–4.
FigureW5–4Surfacepropertyoptions.
11.Inthedialogboxthatappears,notethattheoptiontosmooththesurfacesisselectedbydefault,asshowninFigureW5–5.
FigureW5–5Surfacesmoothingoptions.
12.ClickOKtoaccepttheselectionandclosethesurfacesmoothingassignmenteditor.
13.ClickOKtoclosetheinteractioneditor.
Thecontactinteractionsarenowcomplete.
Definingconstraintsandboundaryconditions
Yournexttaskistodefinetheconstraintsandboundaryconditionsthatwillactontheassembly.Inthefirststepoftheanalysis,bothringsareheldfixed;
inthesecondstep,theouterringisheldfixedwhiletheinneroneisrotated.Adistributingcouplingconstraintisusedtotransmittherotationtotheinnerring.
Definingadistributingcouplingconstraint
1.IntheInteractionmoduletoolbox,clickthereferencepointtool
tocreateareferencepoint.Locatethepointattheorigin(0,0).
Thispointwillbeusedtoapplytherotationtotheinnersurfaceviaadistributingcouplingconstraint.
14.IntheModelTree,double-clickConstraintstocreateanewconstraint.
15.IntheCreateConstraintdialogboxthatappears,selectCouplingasthetypeandclickContinue.
16.Intheviewportselectthereferencepointcreatedearlierastheconstraintcontrolpoint;
selecttheinnersurfaceoftheinnerringasthesurfacetobeconstrained.
17.Intheconstrainteditor,setthecouplingtypetoDistributing.AcceptallotherdefaultsandclickOK.
Definingtheboundaryconditions
18.IntheModelTree,double-clickBCstocreateanewboundarycondition.
19.IntheCreateBoundaryConditiondialogbox,selectDisplacement/RotationastheboundaryconditiontypeandInitialasthestepinwhichtoapplytheboundarycondition.Nametheboundaryconditionfix-yandclickContinue.
20.ClickSetsinthepromptareatoaccesstheRegionSelectiondialogbox.SelectFix-y.
21.IntheEditBoundaryConditiondialogbox,selectU2clickOKtoclosethedialogbox.
22.Usingasimilartechnique,defineaboundaryconditionintheInitialstepnamedfix-xtothesetFix-x(selectU1).
23.Usingasimilartechnique,defineaboundaryconditionintheInitialstepnamedrefPttothereferencepoint(clickSelectinViewportinthepromptareatoselectthepointdirectly;
selectU1,U2,andUR3).
24.EdittherefPtboundaryconditioninthesecondstepandsetthevalueofUR3to2*pi.
Creatingandsubmittingajobforanalysis
Nowyouarereadytocreateandsubmitthemodelforanalysis.
25.Createajobnamedinterf-smoothing.Enteranysuitablejobdescription.Acceptallotherdefaultjobsettings.
26.Submitthejobforanalysis.Whilethejobisrunning,monitoritsprogress.
Visualizingtheanalysisresults
Aftertheanalysisiscomplete,youwillreviewtheresultsintheVisualizationmodule.
27.SwitchtotheVisualizationmodule,andopentheoutputdatabasefileinterf-smoothing.odb.
28.Click
toplottheMisesstress,asshowninFigureW5–6.Inthisfiguresomenodesontheinnerringhavebeenhighlightedtoallowustotracktherotation.
FigureW5–6.Misesstressdistributionwithsmoothing
atendofinterferencefitstep
29.Animatethesolutionhistory.FigureW5–7showstheconfigurationwhen25%,50%,and75%oftherotationhasbeenapplied.NotethepositionofthehighlightednodesineachcaseandhowthecontoursofMisesstressremainsmoothandconstantthroughouttheentiresimulation.Thisistheexpectedresultsincetheslidingbetweenthesurfacesoccursintheabsenceoffriction.
FigureW5–7.Misesstressdistributionwithsmoothing
atthreedifferentconfigurationsduringrotationstep
Part2:
Analysiswithoutsurfacesmoothing
Heregeneralcontactwillbeusedasbefore.Thistime,however,thedefaultoptiontosmoothsurfaceswillbetoggledoff.
30.Copythemodelnamedsmoothingtoonenamedno-smoothing.
31.Editthegeneralcontactinteractiontotoggleoffthesurfacesmoothingoption.
32.Createajobnamedinterf-no-smoothing.Enteranysuitablejobdescription.Acceptallotherdefaultjobsettings.
33.Submitthejobforanalysis.Whilethejobisrunning,monitoritsprogress.
34.Aftertheanalysisiscomplete,evaluatetheresultsintheVisualizationmodule.TheMisesstressattheendofthefirststepisshowninFigureW5–8.Notethenoiseinthesolution.Thebeneficialeffectsofgeometricsurfacesmoothingareclearlyevidentwhencomparedtotheearliersolution.
FigureW5–8.Misesstressdistributionwithoutsmoothing
Part3:
Analysisusingcontactpairswithpreciseadjustments
Herecontactpairswillbeusedinsteadofgeneralcontact.Acombinationofstrain-freeinitialadjustmentsplusdirectuserspecificationoftheinterferencedistancewillbeused.Thistechniqueisparticularlyusefulwhenyouarenotsureoftheinterferencerequiredorwishtoperformaparametricstudy.Ratherthancreateadistinctmeshforeachvalueofinterference,thesamemeshisre-usedandtheoverclosurevalueisspecifieddirectly.
35.Copythemodelnamedsmoothingtoonenamedadjust.
36.Deletethegeneralcontactinteractioncreatedearlier.
37.Definethefollowingsurfaces: