| 动载荷作用下微裂纹的增韧分析 |
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| 引用本文： | 葛东云,陆明万,刘元镛.动载荷作用下微裂纹的增韧分析[J].应用力学学报,2003,20(1):12-17. |
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| 作者姓名： | 葛东云 陆明万 刘元镛 |
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| 作者单位： | 1. 清华大学工程力学系,北京,100084
2. 西北工业大学,西安,710072 |
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| 摘 要： | 在实验研究的基础上，将细观统计力学应用于材料的动态增韧分析中，探索性的研究了在动态载荷作用下微裂纹的增韧机理，并进行了相应的有限元分析计算，得出在动载荷作用下，微裂纹增韧主要表现在微裂纹的快速成核。如果要提高材料在动态情况下的增韧幅值，必须提高增韧颗粒的特征尺寸。
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| 关 键 词： | 微裂纹 动态断裂韧性 颗粒增韧 |
| 文章编号： | 1000-4939(2003)01-0012-06 |
| 修稿时间： | 2002年1月22日 |
Analysis of the Microcrack Toughened Under the Dynamic Loading |
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| Ge Dongyun,Lu Mingwan,Liu Yuanyong.Analysis of the Microcrack Toughened Under the Dynamic Loading[J].Chinese Journal of Applied Mechanics,2003,20(1):12-17. |
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| Authors: | Ge Dongyun Lu Mingwan Liu Yuanyong |
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| Institution: | Ge Dongyun 1 Lu Mingwan 1 Liu Yuanyong 2 |
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| Abstract: | On the basis of experimental study, the micro-stati st ic mechanics was used to analyze the toughening mechanism of the microcrack. Th e toughening mechanism of the microcrack under dynamic loading was studied and m ade the simulation by the finite element method. The result reveals that under t he dynamic loading, the toughening mechanism of the microcrack is the microcrack nucleated very fast. In order to improve the toughening property, the critical value of the toughening materials must be increased. |
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| Keywords: | microcrack dynamic toughness toughened particle |
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