Q550E高强钢不等厚焊接接头残余应力数值模拟
Numerical simulation of residual stress in unequal thickness welded joints of Q550E high-strength steel
郑乔 1夏立乾1
作者信息
- 1. 宝山钢铁股份有限公司中央研究院,上海 201999
- 折叠
摘要
基于ABAQUS有限元软件,开发了应用于模拟焊接残余应力的热—弹—塑性有限元计算方法.利用所开发的计算方法,研究Q550E高强钢不等厚焊接接头残余应力大小和分布.同时,采用热循环测量仪和XRD,分别测量焊接过程的热循环曲线和焊后残余应力的分布.将数值模拟结果与试验进行对比,验证有限元模型的准确性.研究结果表明:纵向残余应力的峰值接近材料的屈服强度;由于试验采用不等厚焊接接头,使得焊接件的残余应力分布不对称;此外,不同焊接材料显著影响焊接接头的峰值应力大小和分布.
Abstract
Based on ABAQUS finite element software,a thermal-elastic-plastic finite element to calculate welding residual stress was developed.Using the developed calculation method,the magnitude and distribution of residual stress in unequal thickness welded joints of Q550E high-strength steel were studied.At the same time,the thermal cycle curve of the welding process and the distribution of residual stress after welding were measured by thermal cycle tester and XRD,respectively.The numerical simulation results were compared with the experiments to verify the accuracy of the finite element model.The results show that the peak value of longitudinal residual stress is close to the yield strength of the material.Because the test uses unequal thickness welded joints,the residual stress distribution of the welded parts is asymmetric.In addition,different welding materials significantly affect the peak stress magnitude and distribution of welded joints.
关键词
Q550E高强钢/数值模拟/焊接残余应力Key words
Q550E high-strength steel/numerical simulation/welding residual stress引用本文复制引用
出版年
2024
NETL
NSTL
万方数据