摘要
Theaccuracyofnumericalsimulationsandmanyothermaterialdesigncalculations,suchastherollingforce,rollingtorque,etc.,dependsonthedescriptionofstress-strainrelationshipofthedeformedmaterials.Onecommonmethodofdescribingthestress-strainrelationshipisusingconstitutiveequations,withtheunknownparametersfittedbyexperimentaldataobtainedviaplanestraincompression(PSC).DuetothehighlynonlinearbehaviouroftheconstitutiveequationsandthenoiseincludedinthePSCdata,determinationofthemodelparametersisdifficult.Inthispaper,geneticalgorithmswereexploitedtooptimiseparametersfortheconstitutiveequationsbasedonthePSCdata.TheoriginalPSCdatawereprocessedtogeneratethestress-straindata,anddatapre-processingwascarriedouttoremovethenoisecontainedintheoriginalPSCdata.Severalgeneticoptimisationschemeshavebeeninvestigated,withdifferentcodingschemesanddifferentgeneticoperatorsforselection,crossoverandmutation.Itwasfoundthattherealvaluecodedgeneticalgorithmsconvergedmuchfasterandweremoreefficientfortheparameteroptimisationproblem.
出版日期
2003年11月25日(中国期刊网平台首次上网日期,不代表论文的发表时间)