composite-Patran-tutorial

S2-1CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationSECTION2SolidComposites•TraditionallylaminatedcompositesaremodeledasshellelementsinNastran•Whenalaminateisthickorwhentheloadpathandstateofstressinthestructureisthreedimensional,solidelementsaremoreappropriateS3-2s33interlaminarnormalstress(peelstress)ands31,s32interlaminarshearstressesareimportantinthestudyofdelamination3Shellvs.SolidCompositeElementsS2-3CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationSOL400SolidComposites•SolidCompositeElements–AvailableinSOL400–Compositelayupdefinitiondirectlyassignedtosolidelements–Stressrecoveryforplystressesandinterlaminarstresses–SupportsprogressiveplyfailureanalysisS2-4CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationAfewsolidcompositesexamplesStringer/SkindelaminationBoltedJointTensionandCompressiontestcouponsScarfRepairS2-5CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationCreatethe3DOrthotropicMaterial1.Createthe3DorthotropicmaterialS2-6CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationCreatethe3DOrthotropicMaterial•Anisotropicmaterialrelationships(fromNastran2011LinearStaticAnalysisUser’sGuide):S2-7CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationCreatethe3DOrthotropicMaterial•Orthotropicmaterialrelationships(fromNastran2011LinearStaticAnalysisUser’sGuide):S2-8CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationCreatethe3DOrthotropicMaterial•Atapematerialisdefinedinthecoordinatesystemshown:•Typicallyn13isprovidedindatasheets.Forexamplen13=0.33•Nastranwantsyoutoentern31•Recallthat•n31=n13x(E3/E1)=0.018Acommonmistakeistoenterthen13valueintothisformS2-9CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningtheCompositeLayup2.Thenextstepistodefinethelaminatelayup.Thisprocessisverysimilartotheshellelementlaminatesetup.•InPatran,clickonthecompositelaminateicontobringuptheform.Enterthethicknessandorientationofeachply•Theplythicknesscanbeenteredeitherastheactualthickness,orasapercentageofthetotallaminatethickness.S2-10CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningtheCompositeLayup•Twowaystospecifyplythickness1)Enterasapercentageoftotallaminatethickness2)Enteractualplythickness(1)%oflaminatethickness(2)ActualplythicknessorS2-11CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningtheCompositeLayup•Tipsonenteringplythickness1)Enterasapercentageoftotallaminatethickness–Allpercentagesmustaddupto100–Nastranrunwillfailifthepercentagesdonotaddupto100ThicknessDirectionCHEXAElement2)Enteractualplythickness–Makesuretheplythicknessesyouentersumtoatotallaminatethicknesswhichequalstotheelementthickness.Nastranwillnotcheckthisforyou.–Behindthescene,Nastrandividestheplythicknessesbythetotallaminatethicknesstocomputefractionsandusethemtofitthepliesinsidetheelementinparametricspace.S2-12CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty3.Thelaststepistocreateasolidlaminatepropertyandassignittosolidelements.•InPatran,clickontheSolidpropertyicon.•SettheoptiontoLaminate.S2-13CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty3.Createasolidlaminateproperty(cont.)•Specifythematerialorientationcoordinatesystem•ItisusedtodefinetheX,Y,Zdirectionsfortheorthotropicmaterialpropertydefinedearlier.•Thedefaultisthebasiccoordinatesystem.S2-14CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty•Specifythematerialorientationcoordinatesystem–Thiscoordinatesystemdirectlydefinesthelocalmaterialcoordinatesystem.Noprojectionisused.–Positiveqdirectionisdefinedusingtherighthandruleaboutthelocalz-axis213xmymzmxcyczcCoord10001S2-15CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationElementcoordinatesystemsplottedDefiningthesolidlaminateproperty•Theelementcoordinatesystemoption(CORDM=-1)isusefulhereiftheelementcoordinatesystemsarealignedappropriatelyasshownbelow:Setto-1S2-16CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty3.Createasolidlaminateproperty(cont.)•Definethethicknessdirection•ThistellsNastranhowyouintendtoorientthepliesinsidethesolidelementsPly1Ply2Ply3S2-17CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty•Definethethicknessdirection•AlsoknownaslayerdirectionXYZElementcoordinatesystemplyplyplyplyplyplyplyplyplyS2-18CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationDefiningthesolidlaminateproperty•Tip:UsetheelementcoordinatesystemplottohelpyouselectthethicknessdirectionS2-19CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationSOL400SolidComposites•NastranentriesgeneratedbyPatranS2-20CompositesTechnologyDay,February2012Copyright2012MSC.SoftwareCorporationSolidCompositeResult