蜂窩夾層板在patran中的建立

蜂窩夾層板在patran中的建立.pptProblemDescriptionUnlikethepreviousworkshopthatinvolvedmodelingthehoneycombstructureusingtheMSC.LaminateModeler,thisworkshopisusedtoshowhowtomodelthehoneycombstructureusingsolidandshellelements.Solidhexahedralelementsaretobeusedtorepresentthecore,andshellelementsaretousedtorepresentthelaminatebacking.Similarconstraintsandloadingaretobeappliedtothemodel.AftertheMSC.Nastrananalysistheresultsaretobelookedat,andperhapscomparedtothoseforthepreviouslaminatemodel.SuggestedExerciseStepsCreateanewdatabaseImporttwosurfacesfromanIGESFileCreateasolidfromthetwoimportedsurfacesMeshthesolidusingIsoMeshMeshatsurfacesofthesolidusingIsoMeshEquivalencethesolidandsurfacemeshesCantileveroneendofhoneycombmodelApplytheforceloadatthefreeendofthemodelCreatematerialpropertiesusingasessionfileCreatetheisotropicmaterialforthecoreCreateacompositematerialusinglaminateinMSC.PatranCreate3DelementpropertysetforcorematerialCreateelementpropertyforupperlaminaCreateelementpropertyforlowerlaminaAnalyzethemodelandattachtheresultsfileVerifythestresstensoranddisplacementresultsdefbcStep1.CreateaNewDatabaseCreateanewdatabase.File/New.Enter2nd_Honeycombasthefilename.ClickOK.SelectMSC.NastranastheAnalysisCode. SelectStructuralastheAnalysisType.ClickOK.

aStep2.ImporttwoSurfacesFromanIGESFileImporttwosurfacesfromanIGESfile.File/ImportSelectIGESfromtheSource.Selectexercise7b.igs.Click–Apply-.ClickOKwhentheIGESImportSummaryappears.abcdeThisishowthegeometryshouldlooklikeafterimportingthefile.Step2.ImporttwoSurfacesFromanIGESFile(Cont.)Step3.CreateaSolidFromthetwoImportedSurfacesCreateaparametricsolidusingthetwosurfaces.Geometry:Create/Solid/Surface.Select2SurfacesastheOption.UnchecktheAutoExecutetoggle.SelectSurface1astheStartingSurfaceList.SelectSurface2astheEndingSurfaceList.Click–Apply.abcdefStep4.MeshtheSolidUsingIsoMeshMeshthegeometricsolid.Elements:Create/Mesh/Solid.SelectHexastheElemShape.SelectIsoMeshastheMesher.SelectHex8astheTopology.UnchecktheAutomaticCalculation.Enter5.0astheGlobalEdgeLengthValue.SelectSolid1astheSolidList.Click–Apply-.abcdefghStep5.MeshatSurfacesoftheSolidUsingIsoMeshMeshthesurfaces(atinnerandouterfreefacesofthehexelements)withshellelements.Elements:Create/Mesh/Surface.SelectQuadastheElemShape.SelectIsoMeshastheMesher.SelectQuad4astheTopology.UnchecktheAutomaticCalculation.Enter5.0astheValue.SelectSurface1astheSurfaceList.Click–Apply-.SelectSurface2astheSurfaceList.Click–Apply-.abcdefghijNotethatbothsurfacescouldhavebeenmeshedsimultaneously.Step5.MeshatSurfacesoftheSolidUsingIsoMesh(Cont.)ShellelementSolidelementStep6.EquivalencetheSolidandSurfaceMeshesEquivalencethesolidandsurfacemeshnodes.Elements:Equivalence/All/ToleranceCube.Click–Apply-.abStep7.CantileveroneendofHoneycombModelFixednodesatoneendusingasolidfaceastheapplicationregion..Loads/BCs:Create/Displacement/Nodal.EnterFixed_surfaceastheNewSetName.ClickInputData….Enter<000>astheTranslations.Enter<000>astheRotations.ClickOK.ClickSelectApplicationRegion…SelectSurfacePickingIcon.SelectSolid1.1astheSelectGeometryEntities.ClickAdd.ClickOK.Click–Apply-.abcdefghijklThenodesatsolidfaceSolid1.1areconstrained.Step7.CantileveroneendofHoneycombModel(Cont.)Step8.ApplytheForceLoadattheFreeendoftheModelApplyloadsatfourpoints.Loads/BCs:Create/Force/Nodal.EnterLoadastheNewSetName.ClickonInputData….Enter<0.500>astheForce.ClickOK.ClickSelectApplicationRegion…abcdefSelectPointPickingIcon.SelectPoint3478fromthegeometryastheSelectGeometryEntities.ClickAdd.ClickOK.abcdStep8.ApplytheForceLoadattheFreeendoftheModel(Cont.)Click–Apply-.Nowthemodelhasbeenassignedaloadof0.5atfourdifferentpoints,atotalof2.aStep8.ApplytheForceLoadattheFreeendoftheModel(Cont.)Step9.CreateMaterialPropertiesUsingaSessionFileRead(play)sessionfilematerials.ses.File/Session/Play..Selectmaterials.ses.Click–Apply-.abcStep10.CreatetheIsotropicMaterialfortheCoreCreateamaterialtorepresentthecoreofthehoneycombstructure.Materials:Create/Isotropic/ManualInput.EnterCoreastheMaterialName.ClickInputProperties…SelectLinearElasticastheConstitutiveModel.Enter215astheElasticModulus.Enter150astheShearModulus.ClickOK.ClickApply.abcdefghStep11.CreateaCompositeMaterialUsingLaminateinMSC.PatranCreateaninner(upper)laminateinMSC.Patran.Materials:Create/Composite/Laminate.Enterupper_plyastheMaterialName.Clickud_t300_n5208fourtimestouploadtotheStackingSequenceDefinition.SelectOverwriteastheTextEntryMode.ClickThicknesses.Enter4(0.12)intheOverwriteThickness.ClickLoadTextIntoSpreadsheet.SelectOverwriteastheTextEntryMode.ClickOrientations.Enter-45/90/45/0intheInsertOrientations.ClickLoadTextIntoSpreadsheet.Click–Apply-.abcdefghijklfj-0.48Enterlower_plyastheMaterialName.ClickonDeleteSelectedRowsmanytimessothattheStackingSequenceDefinitionbecomesempty.Selectud_t300_n5208fourtimes

astheMaterial.SelectOverwriteastheTextEntryMode.ClickonThicknesses.Enter4(0.12)intheOverwriteThickesses.ClickLoadTextIntoSpreadsheet.SelectOverwriteastheTextEntryMode.ClickOrientations.Enter0/45/90/-45intheOverwriteOrientations.ClickLoadTextIntoSpreadsheet.SettheOffsetto–0.48Click–Apply-abcdefghijkmStep11.CreateaCompositeMaterialinMSC.Patran(Cont.)fjlStep12.Create3DElementPropertysetforCoreMaterialCreateelementpropertiesfor3Dsolidcore.Properties:Create/3D/Solid.Enter3D_solidasthePropertySetName.SelectStandardFormulationastheOptions.ClickInputProperties…SelectCoreastheMaterialNamefromtheMaterialPropertySets.ClickOK.SelectSolid1fortheSelectMembers.ClickAdd.ClickApply.efabcdghiStep13.CreateElementPropertyforUpperLaminaCreate2Delementpropertiesforpliesabovethecore.Properties:Create/2D/ShellEnter2D_upper_shellasthePropertySerName.SelectLaminateandStandardFormulationastheOptions.ClickInputProperties…Selectupper_plyastheMaterialNamefromtheMaterialPropertySets.ClickOK.SelectSurface1fortheSelectMembers.ClickA