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| Calculation of three-dimension elastic-plastic based J-integral |
| MA Xin, JIN Zhi-Jiang |
| Institute of Chemical Machinery and Equipment，Zhejiang University，Hangzhou 310027，China |
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Abstract The calculation method of 3D elastic-plastic J-integral by using finite element method was explored，meanwhile，some key questions and techniques were introduced． The calculation model of real cylindrical vessel was set up and its value of J～integral was calculated． In contrast with the method of 1／4 displacement，the J-integral can reflect the motive force of crack quite well．The research has good engineering application value to evaluate and foretell the safety of pressure vessels．
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Published: 28 December 2002
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基于三维效应的弹塑性J积分计算
探讨了用有限元法计算三维弹塑性|，积分的方法，并就一些计算的关键问题和技巧作了分析． 建立了实物压力容器简体上表面裂纹的计算模型，实现了该模型的}，积分计算．对比1／4点位移法表明，J积分值能较好地反映裂纹推动力，这对压力容器的安全性评估及预测具有较大的工程应用价值．
关键词：
三维弹塑性,
J积分,
有限元,
压力容器,
裂纹
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