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1、AdvancesinLargeDeformationProblemsANSYS12.0©2009ANSYS,Inc.Allrightsreserved.1ANSYS,Inc.ProprietaryLargeDeformationProblems©2009ANSYS,Inc.Allrightsreserved.2ANSYS,Inc.ProprietaryChallenges•Complexgeometries–Axisymmetric,2DPlanar,3Detc•Nonlinearmaterials–Hyperelastic(elastomers,polymersetc)–E
2、lasto-Plasticmaterials•HighPressure,Temperature-Workingenvironments•LargeDisplacements•AssemblieswithNonlinearContact©2009ANSYS,Inc.Allrightsreserved.3ANSYS,Inc.Proprietary©2009ANSYS,Inc.Allrightsreserved.4ANSYS,Inc.ProprietaryPerformanceandEfficiencyContactperformanceimprovements•Anewsearc
3、hingalgorithmhasbeenimplemented–Speedsupcontactsearchingby2X-200X,(problemdependent)•LimitedinternalMPCsforrigid-surfaceconstraintarebuilt–Greatlyreducesolvertime.•Contactresultsrelatedto“farfield”contactarenolongercomputedandstored–Greatlyreducesthesizeoftheresultsfile.•Thecomputationtimef
4、orcontactelementassemblyandcontactresultsisreducedbyatleast50%.©2009ANSYS,Inc.Allrightsreserved.5ANSYS,Inc.ProprietaryContactSpeed-upExampleBootSealBOOTSEAL3DElem:11090Nodes:504011.012.0Speed-upDofs:30240Rigid-Deformable+SelfContactContactdatabase11.720.21654.26ContactSearch3465.0475.6445.8
5、0ContactElements505.64188.952.67OtherElements4907.182301.72.13Eq.Solver276.77211.351.30TotalCPU9154.652777.643.29ElapsedTime920727883.30No.ofIterations2462401.02No.ofSubsteps42430.97©2009ANSYS,Inc.Allrightsreserved.6ANSYS,Inc.ProprietaryContactPerformance:NonlinearCustomerModelElems:49701CP
6、U11.012.0Nodes:67582Dofs:405492Contact148372s60.6sSearchingContact1488s791sElementsWalltime167455s12141s©2009ANSYS,Inc.Allrightsreserved.7ANSYS,Inc.ProprietaryContactPerformance:Chain&SprocketSolutiondivergesin11.0Rigidparts,12.012.012.0RepresentativeimagenonlinearCourtesywikipedafrictional
7、contacts1stTrial2ndTrialreleaseIterations739733733Resultsfile1.7G1.7G1.1GWalltime6.5hr.85hr.75hr©2009ANSYS,Inc.Allrightsreserved.8ANSYS,Inc.ProprietaryPerformanceandEfficiencyNewcontactpairtrimminglogic–TheCNCHECKcommandhasnewoptionsforremoving(TRIM)orun
