材料数值模拟基础（朱鸣芳）fdmsoftwares

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1、IntroductionofFDMSoftware1.MAGMAleiBriefIntroductionMAGMAisthecomprehensiveandeffectivesimulationtoolforimprovingcastingquality,optimizingprocessconditionsandsubstantiallyreducingcostsinthefoundry.MAGMAisdesignedtopredicttotalcastingqualitybysimulatingmoldfilling,solidificationandcooling,and,optio

2、nally,stresses/strainsaswellasmicrostructureformationandpropertydistributionsincastingmanufacturingprocesses.1.2CapabilityMAGMAstandardhasamodularstructureandcontainsthefollowingfunctionalitiesforacomprehensivesimulation:•Acommongraphicaluserinterfaceforallmodules•Aprojectmanagementperspectiveforh

3、andlingofprojectversions•SolidmodelingofgeometriesusingaCADkernelaswellasimportandexportofCADdata•Automaticmeshingofgeometriesforthesimulation•Comprehensiveprocessmappingwithdirectaccesstoallmaterials,processstepsandthecorrespondingsimulationsettings•Simulationprogramsforthecalculationofmoldfillin

4、g,solidification,coolingandserialcastingapplications•Interactiveandautomaticresultevaluation.Severalperspectivescanbeopenedandeditedatthesametime•Moduleforthemanagementofthermophysicalandotherprocess-specificdataforthesimulation1.3SolutionSequence1)Preprocessing•Geometricentitymodeling•CADdatainte

5、rface•Automaticmeshing2)Mainprocessing•Inputparameters3)Postprocwssing•Three-dimensionaldisplay•Evaluateresult1.4Applications1)CastIron•Considerationoftheactualmeltcomposition,melttreatmentandinoculation•Utilizationofkineticmodelsandmicromodelingthroughouttheentireprocessforaccurateshrinkagepredic

6、tionbasedonthelocalsolidificationpathandphasesformed•Considerationofmoldstrengthanditsimpactonshrinkagedefects•Predictionoflocalmicrostructuresandmechanicalpropertiesforgray,ductileandcompactedgraphiteiron•Predictionofmolderosion,sandbunvon/penetrationandtrackingofsandinclusions•Detailedcapabiliti

7、esanddatabasesforverticallypartedmolding•Residualstressesanddistortionsincastingsduringsolidificationaftershake-out,gateandriserremovalduringcoolingandsubsequentprocessing•Evaluationofstressesanddistortionoftheca