| LY12铝疲劳裂纹在冲击载荷下的演化研究 |
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| 引用本文： | 席军,段祝平,马维,杨治星,吴穷,何思源.LY12铝疲劳裂纹在冲击载荷下的演化研究[J].实验力学,2002,17(3):345-353. |
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| 作者姓名： | 席军 段祝平 马维 杨治星 吴穷 何思源 |
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| 作者单位： | 1. 中科院力学所LNM,北京,100080
2. 中国工商银行,重庆分行科技处,重庆,630060 |
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| 摘 要： | 对LY12铝合金在低周疲劳条件下的裂纹情况和随后进行的动态拉伸条件下裂纹的发展给予了观察和统计分析，发现裂纹的累积数密度分布在损伤演化过程中保持指数形式，用NAG模型对实验结果进行分析，得出该材料裂纹演化发展方程的各种参数。
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| 关 键 词： | 冲击载荷 疲劳裂纹 动态拉伸 NAG模型 损伤演化 LY12铝合金 低周疲劳 |
| 文章编号： | 1001-4888(2002)03-0345-09 |
| 修稿时间： | 2001年5月23日 |
The Evolution of Fatigue Cracks in Aluminum Alloy LY-12 under Shock Loading |
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| XI Jun,DUAN Zhu ping,MA Wei,YANG Zhi xing,WU Qiong,HE Si yuan.The Evolution of Fatigue Cracks in Aluminum Alloy LY-12 under Shock Loading[J].Journal of Experimental Mechanics,2002,17(3):345-353. |
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| Authors: | XI Jun DUAN Zhu ping MA Wei YANG Zhi xing WU Qiong HE Si yuan |
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| Abstract: | The cracks in aluminum alloy LY 12 specimen under low cycling fatigue are observed and their development caused by following dynamic tensile loading are examined experimentally and analyzed statistically. It is found that the cumulative size distribution of microcracks fits an exponential law during the development of damages. The results of experiments are analyzed by means of NAG model. All parameters in the governing equation are obtained for the material. |
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| Keywords: | fatigue crack dynamic tensile NAG model damage development |
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