激光填粉焊接接头残余应力的数值模拟分析.pdfVIP

HotWorkingTechnolog2022,Vol.51,No.9

激光填粉焊接接头残余应力的数值模拟分析

姜慧玲，彭笑雨，鞠恒，张佳斌，林成新

(大连海事大学船術与海洋工程学院，辽宁大连116026)

摘要：基于ANSYS有限元分析软件，采用“生死单元”法对304不锈钢激光填粉焊接接头的温度场进行了仿真。

利用间接耦合法将温度场结果作为施加载荷，对激光填粉焊接的应力场进行模拟计算，并和钻孔法测量的焊缝接头残

余应力进行对比。结果表明，模拟的焊缝温度场变化符合激光加工温度梯度大的特点；焊接接头残余应力主要分布在焊

缝处，符合激光焊接热影响区小的特点；模拟得到的沿焊缝方向和垂直于焊缝方向的第一主应力变化趋势和试验测得

的结果基本一致。

关键词：激光填粉焊接；残余应力；数值模拟

DOI:10.14158/j.cnki.1001-3814.

中图分类号:TG456.7文献标识码：A文章编号:1001-3814(2022)09-0130-07

NumericalSimulationAnalysisofResidualStress

ofLaserPowderFillingWeldedJoint

JIANGHuiling,PENGXiaoyu,JUHeng,ZHANGJiabin,LINChengxin

(NavalArchitectureandOceanEngineeringCollege,DalianMaritimeUniversity,Dalian116026,China)

Abstract:BasedonANSYSfiniteelementanalysissoftware,thetemperaturefieldof304stainlesssteellaserpowder

fillingweldingjointwassimulatedbusingthelife-and-deathelementmethod.Theindirectcouplingmethodwasusedto

simulatethestressfieldwiththetemperaturefieldresultastheappliedloadduringthelaserpowderfillingwelding.Andthe

resultswerecomparedwiththeresidualstressmeasuredbdrillingmethod.Theresultsshowthatthevariationofsimulated

weldtemperaturefieldisinlinewiththecharacteristicsoflargetemperaturegradientinlaserprocessing.Andtheresidual

stressoftheweldedjointismainldistributedintheweldseam,whichisinlinewiththecharacteristicsofsmallheataffected

zoneoflaserwelding.Besides,thechangingtrendofthefirstprincipalstressalongandverticaltothewelddirectionb

simulationisbasicallconsistentwiththemeasuredresults.

Keywords:laserpowderfillingwelding;resi