基金项目:四川省重点研发计划(2021YFG0060)收稿日期:2021-09-01修回日期:2021-09-12第40卷第2期计算机仿真2023年2月文章编号:1006-9348(2023)02-0292-05铝合金预拉伸板残余应力数值模拟方法研究陈树梁,徐雷*,胡元昊,高涵(四川大学机械工程学院,四川成都610065)摘要:针对铝合金预拉伸板残余应力仿真结果误差较大的问题,提出一种考虑铝合金材料参数变化的数值模拟方法。铝合金预拉伸板淬火和拉伸过程中屈服强度和弹性模量的变化考虑进来,其中屈服强度的变化通过设置温度阈值实现,弹性模量的变化通过将每个单元积分点弹性模量表示成温度和塑性变形的函数来实现。通过验证发现,上述方法有效地降低了仿真结果与实验数据之间的误差,能很好地预测铝合金板残余应力的大小和变化趋势。通过对照仿真发现淬火与拉伸工艺之间的自然时效时间越长,所提方法的效果越显著。关键词:铝合金预拉伸板;残余应力;数值模拟;自然时效中图分类号:TP391.9文献标识码:BStudyonNumericalSimulationMethodofResidualStressofAluminumAlloyPre-StretchingBoardBasedonChangeofMaterialParametersCHENShu-liang,XULei*,HUYuan-hao,GAOHan(CollegeofMechanicalEngineering,SichuanUniversity,ChengduSichuan610065,China)ABSTRACT:Aimingattheproblemoflargeerrorofinthesimulationresultsofresidualstressofsimulationresultsofaluminumalloypre-stretchingboard,anumericalsimulationmethodconsideringthechangeofaluminumalloyma-terialparametersisproposed.Whenestablishingthesimulationmodel,thechangesofyieldstrengthandelasticmod-ulusduringquenchingandstretchingofaluminumalloypre-stretchingboardwerearetakenintoaccount.Thechangeofyieldstrengthwaisrealizedbysettingthetemperaturethreshold,andthechangeofelasticmoduluswaisrealizedbyexpressingtheelasticmodulusofeachelementintegralpointasafunctionoftemperatureandplasticdeformation.ThroughTheverificationshows,itisfoundthatthismethodcaneffectivelyreducetheerrorbetweenthesimulationresultsandtheexperimentaldata,thusandcanwellpredictthemagnitudeandchangetrendofresidualstressinalu-minumalloyplate.Throughroughthecomparativesimulationexperiment,itisfound,itisfoundthatthelongerthenaturalagingtimebetweenquenchinganddrawingprocess,t...