摘要
对不同焊接热源的特征要素进行分析,焊接数值模拟中采用高斯面热源和双椭球体热源处理焊接加热问题均不能准确地反映焊接熔池形状.文中提出焊缝表面高斯热源和焊缝内双椭球体热源结合的组合热源模型,其熔池与实际焊缝熔合线吻合.应用上述三种热源对马氏体不锈钢平板对接电弧焊的温度场及应力场进行了数值模拟.结果表明,使用组合热源进行数值模拟较之单独使用高斯或双椭球热源的残余应力计算值与实测值吻合度更高.
Factors of various welding heat sources were analyzed.It is found that Gaussian heat source and double ellipsoidal heat source can not indicate welding molten pool exactly in weld simulation.The combined welding heat source which combined Gaussian face heat source with double ellipsoidal body heat source was used in welding simulation.The welding molten pool calculated with the combined welding heat source consists with practice fusion line.The temperature field and stress field of stainless steel by arc welding were simulated with these three kinds of welding heat sources.The residual stress field simulated using the combined welding heat source is in good agreement with test and more exactly than those using the other two heat sources.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第5期61-64,68,共5页
Transactions of The China Welding Institution
关键词
数值模拟
组合热源
残余应力
simulation
combined heat source
residual stress
作者简介
盖登宇，男，1970年出生，博士研究生，高级工程师主要从事材料加工CAE研究．发表论文12篇．Email：gaidengyu@hrbeu.edu．cn
