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过载拉伸消除不锈钢焊接残余应力的数值分析

宇慧平, 冯峰, 张亦良, 赵尔冰

宇慧平, 冯峰, 张亦良, 赵尔冰. 过载拉伸消除不锈钢焊接残余应力的数值分析[J]. 焊接学报, 2016, 37(8): 119-123.
引用本文: 宇慧平, 冯峰, 张亦良, 赵尔冰. 过载拉伸消除不锈钢焊接残余应力的数值分析[J]. 焊接学报, 2016, 37(8): 119-123.
shu
YU Huiping, FENG Feng, ZHANG Yiliang, ZHAO Erbing. Numerical analysis of elimination stainless steel welding residual stress by over load tension[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 119-123.
Citation: YU Huiping, FENG Feng, ZHANG Yiliang, ZHAO Erbing. Numerical analysis of elimination stainless steel welding residual stress by over load tension[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 119-123.
shu

过载拉伸消除不锈钢焊接残余应力的数值分析

  • 1.

    北京工业大学 机电学院, 北京 100124

  • 2.

    北京市朝阳区特种设备检测所, 北京 100122

基金项目: 北京市自然科学基金资助项目（3122004）

Numerical analysis of elimination stainless steel welding residual stress by over load tension

  • 1.

    College of Machine Electricity, Beijing University of Technology, Beijing 100124, China

  • 2.

    Beijing Inspection Institute of Special Equipment, Beijing 100122, China

摘要

    摘要
  • 摘要: 用试验与数值模拟相结合的方式对过载法消除残余应力做了定量分析.采用SYSWELD软件对多层焊进行焊接模拟，得到焊接后残余应力场，将其导入Nastran软件，再进行过载拉伸模拟，研究其残余应力的变化规律.结果表明，随着过载拉伸作用的逐步增大，焊接残余应力峰值大幅降低，且焊接残余应力分布更加均匀，但是超过一定数值以后，残余应力消除的效果逐步减弱.计算结果与X射线测量结果趋势吻合，表明该数值方法是可行的.研究方法和研究结果对焊接残余应力消除提供参考.
    Abstract: The lumen parts of sterilizer pressure vessels are generally welded by austenitic stainless steel and there will be serious stress corrosion that caused by the common action by the welding residual stress and corrosion medium. Over load method can be used to reduce the residual stress. The finite element method (FEM) and experiment are adopted to quantitively analyze the effect of over load tension on residual stress. At first, SYSWELD software is used to calculate the welding residual stress contour, and then Nastran software is used to simulate the over load tensionprocess to investigate the variation of the residual stress. The simulation results show that with the increase of tensile strain, the maximum values of welding residual stress were reduced dramatically, and the welding residual stress contours become more uniform. However, once the value of tensile strain exceeds a certain critical value, the effect of reducing welding residual stress turn to being gradually weakened. The simulation results were agreed well with X ray measurement results, which shows that this method is feasible. Such research methods and results will provide reference for the elimination of welding residual stress and welding quality control.
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    • 参考文献(9)
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  • 收稿日期:  2014-03-16

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