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125200510JOURNALOFPLASTICITYENGINEERINGVol112No15Oct120053(,430070):,,ABAQUS/EXPLIC2IT,,,:;;:TG33:A:100722012(2005)05200862063(50335060);([2002]383)E2mail:hualin@mial1whut1edu1cn:,,1962,,,:2005203207;:20052042301(nonlinearproblemofdynamiclargedeformation)[1],,:(),,(),,:,,,,,,,,,,,[2],,,,,[3],:(),[4],,,,,,,[5][6],Abaqus,,,,2AbaqusExplict[7],,,:;,[8],,,,[9],,,,,Abaqus,,,,,,:ttcrTnttcrTn,tcr,,:tcr=LminCdLmin,Cd,Cd=+2E:=E(1+)(1-2)=E2(1+)tcr=LminE(1-)(1+)(1-2)AbaqusExplict,n,nn=T/tcr,T(,T)tcr=min(L+2),nTmax(1L+2),,nT,Ln,Explict,n,,,,,,,,,,,,,a,tcra,naAbaqus,n,,,3,,,,Abaqus/Explict,785:,Abaqus/Explict:1),a,Abaqus/Ex2plicta,,DT(Abaqus/ExplictDT,DT)a2)DTDT,,DTAbaqus/ExplictDT,Abaqus/Ex2plict,,DT,DT,,Abaqus/Explict,DT,,3/31Abaqus/ExplictDT,a,Abaqus/ExplictDTa,DT,Abaqus/ExplictDT,DT,DTDT,Abaqus/ExplictDT,3a)DT,DT,,DTDTDT4,16,Abaqus/ExplicDT4b)DT,,Abaqus/ExplictDT,DTDTAbaqus,,,,Abaqus[10,11],,,,,,,,,,Abaqus/ExplictDT,,DT,DTDT,,,DT,DT,,,Abaqus/Explict,DTDT,DT,DT,,c)DT,,Abaqus/ExplictDT,DTDTDTDTDT,DT,,DT,,,[12],8812,,,,,:,,011,4Abaqus,,Abaqus/Explict:1Fig11Three2dimensionalfiniteelementmodelofringrolling=11340kg/m3,E=17GPa,=013,0101m,tcr,tcr=4195510-6s,Abaqus/ExplictDT2151110-6s,Abaqus/ExplictDT,,,41001000,22Fig12Thefinaldeformationthingsofdifferentmassscaling241001000,,;,,;,,,10004100,,,3,0,,4,,,,100,,,[13],4,4,,,,,100,,,,,,,4,4,,011,013,,,014s011,100,011,,113,41s011,,1/3,,4,3:,Abaqus/Explict,410041DT,DT2bc(2a985:3Fig13Axis2orientationdeformationofring4Fig14Kineticenergyofring5Fig15Ratioofkineticandpotentialenergy,a1)34,DT23,,,6Fig16Axis2orientationdeformationofring6,3,37Fig17Kineticenergyofring8Fig18Ratioofkineticandpotentialenergy9DTFig19ComparisonofDTvalues7,3,bac,ac83,,ac011,ca,0117,a0131,ca,011ab,011,01095,,bac8DTAbaqus/Ex2plictDT2151110-6s,DT25102210-6s,3DT5102210-6saDT,DT,,DT,,Abaqus/Explict0912DT,a,DTbDT,DT,,DT,5102210-6scDT,DT,,DT5102210-6s,3,CPU1h39min,1h40min1h42min34b,,3:,,,b,,,5,,,,:,,,,011,;,[1]..:,2004[2]..:,2002[3]..,2001.8(4):8183[4]GuyanRJ.Reductioninstiffnessandmassmatrices.AIAAjournal,1965.3(2):380[5],..,2001.8(1):5154[6],..,2004.24(2):146149[7].ABAQUS/Explicit.:,1998[8]..,2004.11(1):6870[9],,..:,2001[10],,..,2002.20(2):2124[11]LeeNK,YoonJH,YangDY.Finiteelementanal2ysisoflargedeformationbyautomaticrenodingasaweakremeshingtechniqueIntJMeshSci,1992.34(4):255273[12]AbaqusAnalysisUsersManual.ABAQUSCorp.,2003[13]..[].:,2000(100)195:AnimprovedsubdividingmethodforquadrilateralfiniteelementGuoXiao2xia(ShenzhenPolytechnicInstitute,Shenzhen518055China)Abstract:Thepaperdescribesthedevelopmentofanautomatic,2Dquadrilateralelementmeshgenerator1Thecoreofmethodolo2gyisthatthedomaintobemeshedissubdividedinfinitelyuntilonlyquadrilateralelementsremain1Sometechniquesconcerningdeterminationofbestsplittinglineareimprovedindetail1Theapplicationexamplewasgiven,whichshowversatilityandapplica2bilityofthepresentedapproaches1Theimprovedmeshgeneratorcanbeappliedininitialmeshgenerationandremeshingfortherigid2plasticFEM1Keywords:finiteelement;quadrilateralmesh;automaticmeshgeneration(91)Applicationofmassscalinginsimulationofringrollingbythree2dimensionalfiniteelementmethodQIANDong2shengHUALinZUOZhi2jiangYUANYin2liang(WuhanUniversityofTechnology,Wuhan430070China)Abstract:Thesignificanceandtheoreticalbasisofusingthemethodofmassscalinginthesimulationofringrollingbythethree2dimensionalfiniteelementmethodwaselaboratedinthispaper,andthemethodsofmassscalingwereclassifiedintheprocesssim2ulationofexplicitdynamicfiniteelement,andtheprinciplesofselectingthemethodofmassscalingweregainedintheprocessofringrolling1Intheend,therigid2plasticfiniteelementplumbummodelingwasestablishedonthebaseofABAQUS/EXPLICToperatingflat1Theselectingresultwasprovedthroughsimulationandcomparingthecalculationtheory1Consequently,themostappropriateringrollingmassscalingmethodwassummarized1Keywords:ringrolling;finiteelementsimulation;massscaling00112