| 修正的B-E模型对裂纹快速扩展的数值模拟 |
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| 引用本文： | 葛东云,刘元镛. 修正的B-E模型对裂纹快速扩展的数值模拟[J]. 航空材料学报, 2000, 20(2): 15-20 |
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| 作者姓名： | 葛东云 刘元镛 |
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| 作者单位： | 清华大学工程力学系,北京,100084;西北工业大学民航工程学院,西安,710072 |
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| 基金项目： | 国防科技预研基金,96J12.1.1.HK0352, |
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| 摘 要： | 在连续损伤力学和突然损伤模型的基础上,提出了利用修正的B-E模型来模拟裂纹的快速扩展,所得到的有限元模型可以在无裂纹扩展速率的前提下模拟裂纹的快速扩展,得到的结果与实验得到的裂纹扩展速率值相当,说明该方法可以用于模拟裂纹的快速扩展过程.
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| 关 键 词： | 双参数 损伤 裂纹快速扩展 |
| 修稿时间： | 1999-10-14 |
A simulation of rapid crack propagation using a modified B-E model |
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| GE Dong-yun,LIU Yuan-yong. A simulation of rapid crack propagation using a modified B-E model[J]. Journal of Aeronautical Materials, 2000, 20(2): 15-20 |
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| Authors: | GE Dong-yun LIU Yuan-yong |
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| Abstract: | The double parameter model simulating the rapid crack propagation is proved on the basis of the damage mechanics and the sudden damage model. In this model, the damage ratio is considered when the rapid crack propagation was simulated by finite element method. Using this model and the damage when the material is destroyed, the crack propagation rate can be obtained by FEM without the crack rate. And the result, gotten by the FEM is very close to the result gotten by the experiment. It is showed that this method can be used to simulate the crack propagation. |
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| Keywords: | double parameters damage crack rapid propagation |
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