节材料一部分概述msc nastran sol lecmatls pt1.pptx

SECTION8MATERIALS–PARTI

OVERVIEWMaterialTypesAvailableinMSC.NastranSOL600ElasticityandPlasticityMaterialLinearityandMaterialNon-linearityHardeningLawsTheneckingProblemTrueStressandTrueStrainVersusEngineeringorNominalStressandStrainHowtoCalculateandEnter

(inMSC.Patran)PlasticLawsLaminatedCompositeShells

MSC.PATRANNASTRANPREFERENCEMATERIALSTheMSC.PatranNastranPreferenceMaterialsformallowsthemodelingof:MaterialsPlasticsRubbersCompositesFoams

DependencesofmaterialdataonTemperature,StrainorStrainRateischaracterizedusingmaterialfields.ExistingConstitutivemodelscanbeactivated/deactivated.Usefulinrestartjobswherethematerialmodelmaychange.MSC.PATRANUSAGEAlloftheconstitutivemodelsofagivenmaterialenteredunderthesamematerialsetname.Example:ElasticPlasticCreep

MSC.PATRANNASTRANSOL600PREFERENCEMATERIALSTheMSC.PatranNastranSOL600PreferenceMaterialsmaybeIsotropicornot:Isotropic2DOrthotropic3DOrthotropic2DAnisotropic3DAnisotropicCompositeAlargelibraryofCompositematerialrulesisavailable:

MATTORTSpecifiestemperature-dependentpropertiesofelasticorthotropicmaterialsforlinearandnonlinearanalyses?Format:Example:12345678910MATTORTMIDT(E1)T(E2)T(E3)T(NU12)T(NU23)T(NU31)N/A??T(G12)T(G23)T(G31)T(A1)T(A2)T(A3)T(SY)T(WHS)?12345678910MATTORT100567?????MATTORTCARDFORMAT

Thereisaone-to-onerelationshipbetweenstressandstrainforagiventemperatureExampleoflinear-elasticmaterialELASTICITYAnideallyelasticmaterialhasthefollowingproperties:Ithasaunique,natural,elasticreferencestatetowhichitwillreturnwhenthedeformation-causingforcesareremovedThedeformationbetweenthiselasticreferencestateandthecurrentsstateisreversibleAsaresult,loadsaresaidtobefullyrecoverable

Exampleofhyper-elasticmaterialRubberexhibitnearlyhyper-elastic(nonlinearyetelastic)behaviorELASTICITYANDHYPERELASTICITYAtlowstra