2007 numerical simulation of an aluminum alloy tube hydroforming外语英文电子书

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1、JournalofMaterialsProcessingTechnology179(2006)6773NumericalsimulationofanaluminumalloytubehydroformingJorgePaivaAbrantes∗,CarlosEduardoCeliadeLima,GilmarFerreiraBatalha´LaboratoryofManufacturingEngineering,DepartmentofMechatronicsandMechanicalSystemsEngineering,EscolaPolit´ecnicadaUniversidade

2、deSaoPaulo,Av.Prof.MelloMoraes2231,05508970S˜aoPaulo,SP,BrazilAbstractHydroformingisthefabricationprocessthatusesafluidmediumtoformapiecebyusinghighinternalpressure.Intubehydroforming,atubularblankisplacedbetweentwodies,sealedandpressurizedwaterupto1200MPaisinjected,deformingthetubewallsinthecav

3、ityformofthedies.Theadvantagesofthehydroformingoverthetraditionalprocessare:(a)weightreduction;(b)projectflexibilityincrease,makingpossibletocreatenewpieceshapes;(c)stiffnessandrigidityincreasebyobtainingtubepieceswithoutweld;(d)unionsregionselimination;(e)dimensionalrepeatability.Theweightreduc

4、tionobtainingbythehydroformingprocesscanbealliedtotheweightreductionbythesubstitutionofmaterialsofhighdensitybymaterialoflowdensity.Asforthispapercollectsthistwomattersanddiscussthealuminumtubehydroforming.Themainobjectiveofthispaperisestablishthebasicunderstandingofthebehaviorofaaluminumtubewh

5、enitissubmittedtothehydroformingprocess.AreviewofthealuminumalloyshydroformingandthesimulationviaFEMoftwo-hydroformingprocessismade:forthefirstsimulation,thehydroformingofafreealuminumtubewithoutaxialforceandforthesecondone,thestudyofthehydroformingofatubeinadie.Bothsimulationsweredevelopedwitht

6、hecommercialsoftwareLS-DYNAandtheresultsarepresentedandcomparedwiththeresultsofthereferencesinthesameconditions.©2006ElsevierB.V.Allrightsreserved.Keywords:Hydroforming;Plasticity;Tube;Aluminum;FEM;Wrinkling1.Introductionmore,itdoesnthavetoconfusethelevelofpressureandtheformingpotentialofthepar

7、tandtheconsequentattainmentofThetubehydroformingprocessconsistsofthesimultaneoushydroformedpartswithoutdefects.orsequencedapplicationofanaxialcompressionaswellasanInthefirstpartofthispaper,itisstudiedafreehydrostaticinternalpressur