说明文案结合人tact9.pptx

9.BondedContactDec19999-29.BondedContactContactbetweentwoobjectsisoneofthemostfrequentlyencounteredphenomenainengineeringanalysis.Itisalsooneofthemostdifficultnonlinearitiestohandlebecausethestiffnesscansuddenlydisappearorreappeardependingonwhethertheobjectsareoutofcontactorincontact.ArubbersealinvariousstagesofcontactasitiscompressedbyarigidsurfaceDec19999-3...BondedContactMostcontactanalysesrequireadvancedanalyticaltechniquesthatarebeyondthescopeofthistrainingcourse. However,oneclassofcontactanalysis,knownasassemblycontact,canoftenbeperformedwithoutknowledgeofadvancedtechniques.AssemblycontactusesthebondedoptionofANSYScontactelementsandisalsocalledbondedcontact.Inthischapter,wewillbrieflydescribehowtosetupandsolveabondedcontactanalysis:A.DefinitionsB.TypicalProcedureC.WorkshopDec19999-4BondedContact

A.DefinitionsBondedContactisaspecialcaseofcontactanalysiswherethetwocontactingsurfacesareassumedtobegluedtogetherthroughouttheanalysis.Thetwocontactingsurfacesformacontactpair.OneofthesurfacesisdesignatedasthetargetsurfaceAndtheothersurfaceiscalledthecontactsurfaceContactsurfaceTargetsurface(innersurfaceofcylinder)Dec19999-5BondedContact

...DefinitionsAdvantagesofbondedcontact:Fastersolutionssincetherearenocontactconvergenceissues.Convenientforaquickanalysisofassemblies,forexample.Small-deflectioncasescanberunaslinearanalyseswithonesubstepandoneequilibriumiteration.Alsoallowslarge-deflection(nonlinear)analyses.(Couplingandconstraintequationsarenotmendedfornonlinearanalyses.)Dec19999-6BondedContact

B.TypicalProcedureSevenmainsteps:1. Createorimportthegeometry.2. Meshallofthecontactingbodies.(Requiredforstep3.)3. Createthecontactpair.4. Specifytheanalysis