摘要
采用试验手段和数值模拟方法研究了不锈钢厚板多道焊的残余应力分布特征.通过比较数值模拟结果和试验测量值,验证了基于Quick Welder软件开发的用于多道焊的热-弹-塑性有限元计算方法.同时,通过数值模拟澄清了焊接顺序对最终残余应力的影响.结果表明,焊接顺序对纵向和横向残余应力有明显影响.焊接顺序不仅显著影响峰值应力的大小而且大幅改变应力分布形状.
Features of welding residual stress distribution in an austenitic stainless steel thick plate joint were investigated by means of experiment and numerical simulation technology.Through comparing the simulation results and experimental measurements,the prediction accuracy of the developed thermo-elastic-plastic FEM based on Quick Welder was verified.Meanwhile,the influence of welding sequence on the residual stress distribution was clarified using numerical simulation method.The results show that both transverse residual stress and longitudinal residual stress were significantly affected by deposition sequence.The deposition sequence not only largely changes the peak values of residual stress,but also alters the shape of residual stress distribution.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第12期55-58,115-116,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)
关键词
数值模拟
非线性分析
焊接残余应力
焊接顺序
numerical simulation
non-linear analysis
welding residual stress
welding sequence
