| 扩展裂纹的动态COD |
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| 引用本文： | 陈俊英,吕念春.扩展裂纹的动态COD[J].哈尔滨工业大学学报,1999,31(3):88-89. |
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| 作者姓名： | 陈俊英 吕念春 |
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| 作者单位： | 哈尔滨工业大学航天工程与力学系 |
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| 摘 要： | 利用文献「１」给出的扩展裂纹与路径地匀的Ｊ积分，该积分适用于以任意可变速率扩展的裂纹动力学问题，并推导了Ｊ积分与动态ＣＯＤ及动应力强度因子Ｋ（ｔ）之间的关系，利用Ｊ积分有可能建立适用于裂纹扩展全过程，起裂、失稳扩展及止裂阶段的断裂准则。
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| 关 键 词： | 动态COD 扩展裂纹 裂纹张开位移 断裂力学 |
Dynamic COD of Propagating Crack |
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| Chen Junying, Lu Nianchun, Cheng Jin.Dynamic COD of Propagating Crack[J].Journal of Harbin Institute of Technology,1999,31(3):88-89. |
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| Authors: | Chen Junying Lu Nianchun Cheng Jin |
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| Abstract: | The relations between the dynamic COD and the dynamic 8stress intensity factor K(t) has been discussed by using the Path-independent J. integral given in reference 1], which is a linear inited suitable for an arbitrary changeable velocity on problems of crack propagation in dynamics and different from sectional integral used in crack dynamics in the past, and has therefore much wider usage the relations among J integral, the dynamic COD and the dynamic stress intensity factor K(t) are deduced. By J. integral, a suitable fracture criteria can be found for the whole course of crack propagation. |
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| Keywords: | Elastodynamics fracture dynamics fracture |
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