摘要
采用有限元热弹塑性分析方法对T形接头不同焊接顺序的残余应力和变形进行模拟.有限元模型中选用三维实体单元,分析了材料物性参数随温度的变化和对流、辐射散热的影响.运用单元生死技术模拟T形接头多道焊接过程,获得了不同焊接顺序T形接头焊接温度场和残余应力、变形场,并对计算结果进行了分析.结果表明,焊接顺序对T形接头的残余应力和变形有较大的影响,采用先焊一侧,然后焊另一侧的方案所得到的残余应力和角变形最小.
This paper analyzes the thermo mechanical behavior and evaluates the welding residual stresses and distortion with various types of welding sequence in T-joint welds by performing thermal elasto-plastic analysis using finite element techniques.The 3-D solid elements are used in FE model,and material properties depending on the temperature are considered as well as the convection and radiation as boundary conditions.The stress distributions and distortion field are obtained.The welding residual stress and distortion are largely influenced by the welding sequences.When welding was performed continuously from one side to the other side,the magnitude of residual stress and distortion was the smallest.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第10期37-40,115,共4页
Transactions of The China Welding Institution
基金
国家863高技术研究发展计划资助项目(2008AA09A106)
关键词
T形接头
有限元模拟
焊接顺序
残余应力
焊接变形
T-joint
finite element simulation
welding sequence
residual stress
welding deformation
