| 运动裂纹止裂判据的一种新提法 |
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| 引用本文： | 龚朴,赵海滨,王玮.运动裂纹止裂判据的一种新提法[J].华中科技大学学报(自然科学版),1999(11). |
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| 作者姓名： | 龚朴 赵海滨 王玮 |
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| 作者单位： | 华中理工大学力学系 |
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| 基金项目： | 国家“八五”重点科技攻关资助 |
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| 摘 要： | 从断裂动力学问题的非线性性质和能量观点出发，讨论了运动裂纹止裂判据的正确提法；指出了目前广泛使用的运动裂纹止裂判据的不适当性；提出了一种新的运动裂纹的止裂判据．研究表明，裂纹失稳扩展时存在一个极小的速度值
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| 关 键 词： | 断裂动力学 动态断裂韧性 止裂判据 |
A New Arrest Criterion of the Moving Crack |
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| Gong Pu,Zhao Haibing,Wang Wei.A New Arrest Criterion of the Moving Crack[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1999(11). |
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| Authors: | Gong Pu Zhao Haibing Wang Wei |
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| Institution: | Gong Pu Zhao Haibing Wang Wei |
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| Abstract: | On the basis of view of the non linear property and energy of the dynamic fracture problems, a correct expression of the moving crack arrest criterion is systematically discussed. It is pointed that the non suitable properties of the moving crack arrest criterion are improperly used. A new arrest criterion for the moving crack is proposed. It is shown that there is a minimum limit speed when crack unsteadily spreads. |
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| Keywords: | dynamic fracture mechanics dynamic fracture toughness arrest criterion |
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