摘要
基于JWRIAN焊接数值模拟软件,开发了考虑固态相变的热—冶金—力学耦合的数值计算方法来模拟低温相变钢的焊接残余应力.重点讨论了固态相变中的体积变化、屈服强度变化和相变塑性对焊接残余应力的影响.结果表明,相变引起的体积变化和屈服强度变化对最终的焊接残余应力分布和大小有显著影响,相变塑性与前两者相比较影响相对较小,但它对焊缝和热影响区在相变过程中的应力变化趋势有一定的减缓作用,从而适度"松弛"了残余应力.
In this study,a computational approach based on JWRIAN software was developed to predict welding residual stress in low temperature transformation( LTT) steel joint with considering solid-state phase transformation. The main objective was to clarify the influences of volume change,yield strength variation and transformation induced plasticity( TRIP) on the welding residual stress by means of the developed numerical method. Numerical results indicate that both volume change and yield strength variation during austenite-martensite have significant influences on the formation of welding residual stress in the LTT steel joint. In addition,TRIP also has somewhat influence on the welding residual stress,and it can relax the change tendency of both longitudinal and transverse stresses during phase transformation to some extent.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第8期9-12,113,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51275544)
中央高校基金资助项目(CDJZR12130036)
关键词
固态相变
数值模拟
残余应力
相变塑性
solid-state phase transformation
numerical simulation
residual stress
transformation induced plasticity
