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考虑残余应力的焊接结构多轴疲劳准则

周昊1,刘英芳2,刘刚1,黄一1

周昊1,刘英芳2,刘刚1,黄一1. 考虑残余应力的焊接结构多轴疲劳准则[J]. 焊接学报, 2017, 38(11): 41-46. DOI: 10.12073/j.hjxb.20160114002
引用本文: 周昊1,刘英芳2,刘刚1,黄一1. 考虑残余应力的焊接结构多轴疲劳准则[J]. 焊接学报, 2017, 38(11): 41-46. DOI: 10.12073/j.hjxb.20160114002

考虑残余应力的焊接结构多轴疲劳准则

  • 摘要: 因随机波浪载荷及焊接残余应力的存在,海洋工程焊接结构的疲劳失效受多轴疲劳机理控制,然而目前的多轴疲劳准则对焊接残余应力关注较少,针对上述问题文中通过将不包含焊接残余应力的有限元计算应力场与焊接残余应力场线性叠加作为多轴疲劳寿命计算应力场,提出了一种基于临界面法的多轴疲劳寿命预测准则,通过对国际上已公开发表的疲劳试验数据进行有限元分析并与多轴疲劳准则MWCM对比,证明文中方法比MWCM具有更高的准确性,对于非比例载荷作用下的疲劳寿命预测效果尤为显著,同时证明了文中方法可以有效考虑焊接残余应力的影响.
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  • 收稿日期:  2016-01-13

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