| 能容纳二次应力的J积分断裂参量 |
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| 引用本文： | 潘红良 李培宁. 能容纳二次应力的J积分断裂参量[J]. 华东理工大学学报(自然科学版), 1996, 22(2): 158-164 |
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| 作者姓名： | 潘红良 李培宁 |
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| 作者单位： | 华东理工大学机械工程系 |
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| 基金项目： | “八五”国家重点科技攻关课题 |
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| 摘 要： | 在阐述Ｊ积分物理意义的基础上，通过有限元的计算，对多种能用于二次应力情况下的修正Ｊ积分进行了评价，讨论了它们间的相互关系及其适用范围，证明了由Ｂｌａｃｋｂｕｒ提出的Ｊ＾ｎｗ的物理意义最为明确，可作为一种断裂参量。
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| 关 键 词： | 二次应力 断裂参量 有限元 断裂力学 J积分 |
On J-integral Parameter in the Presence of secondary Stresses |
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| Pan Hongliang and Li Peining. On J-integral Parameter in the Presence of secondary Stresses[J]. Journal of East China University of Science and Technology, 1996, 22(2): 158-164 |
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| Authors: | Pan Hongliang and Li Peining |
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| Abstract: | Since Rice J-integral has lost the propriety of path independence in the presence of secondary stresses,it can not be used to describe the stress-strain fields in the crack tip.Until now several modified J-integrals have been put out for this situation. In the paper,the physical significance and suitability of modified J-integrals have been evaluated by FEM.The relationship among them has also been discussed.Results have shown that the physical significance of given by Blackburn is clearest.It can be used as a fracture parameter in the presence of secondary stresses. |
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| Keywords: | secondary stresses fracture parameter finite element method fracture criterion |
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