热源形状参数对薄板焊接残余应力和变形的影响  

Effects of welding heat source parameters on residual stress and distortion in thin plate joint

作　　者：王能庆[1] 童彦刚[1] 邓德安[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《焊接学报》2012年第12期97-100,118,共4页Transactions of The China Welding Institution

基　　金：重庆市自然科学基金资助项目(CSTC;2010BB4060)

摘　　要：采用热-弹-塑性有限元方法模拟焊接残余应力和变形时,对于移动热源模型形状参数的选取,在大多数情况下大都是根据研究者的经验来确定.然而对于热源模型形状参数对焊接残余应力和变形的影响尚不十分明确.基于ABAQUS有限元软件,以高强钢SM490A单道TIG焊为例,通过建立三维有限元模型和采用双椭球体积移动热源模型,研究了热源模型形状参数对焊接残余应力和变形的影响.结果表明,热源模型形状参数对焊接残余应力影响较小,而对焊接变形,尤其是对角变形有一定程度的影响.The thermo-elastic-plastic finite element method(FEM) has been widely used to predict temperature field,residual stress distribution and deformation.However,how to choose the parameters of moving heat source model for given welding conditions heavily depends on a analyst's experience.It is necessary to clarify the influence of heat source parameters on residual stress and deformation.Therefore,an attempt was made to examine the influence of heat source parameters on residual stress and deformation in a thin plate joint using thermo-elastic-plastic FEM with Goldak heat source model in the current work.The simulation results show that the heat source parameters have no significant effect on residual stress,but have effect on welding deformation to some extent.

关 键 词：热源模型 焊接残余应力 焊接变形 数值模拟 

分 类 号：TG115.25[金属学及工艺—物理冶金]