| Crack propagation of Mg-Li alloys by impact load |
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| 作者姓名： | 曲志明 梁晓颖 周心权 史三元 |
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| 作者单位： | [1]School of Civil Engineering, Hebei Engineering University, Handan 056038, China [2]State Key Laboratory of Coal Resource and Safe Mining, China University of Mining and Technology, Beijing 100083, China |
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| 基金项目： | Project（2005CB221506） supported by the National Basic Research Program of China |
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| 摘 要： |
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| 关 键 词： | 镁 锂 合金 冲击负荷 有限元分析技术 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Crack propagation of Mg-Li alloys by impact load |
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| QU Zhi-ming, LIANG Xiao-ying, ZHU Xin-quan, SHI San-yuan.Crack propagation of Mg-Li alloys by impact load[J].Transactions of Nonferrous Metals Society of China,2007,17(A01):232-237. |
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| Authors: | QU Zhi-ming LIANG Xiao-ying ZHU Xin-quan SHI San-yuan |
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| Affiliation: | QU Zhi-ming, LIANG Xiao-ying, ZH0U Xin-quan, SHI San-yuan |
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| Abstract: | Under impact load, using energy estimation and updated finite element method, the crack propagation of Mg-Li alloys was studied, and the relations between high speed impact, time interval and crack propagation velocity were deduced. The effects of impact pattern characteristic parameters such as impact range and time interval on impact fatigue crack growth and propagation rates were discussed. The results show that with the development of crack length, the crack propagation rate along the central sample alloy swiftly increases to the maximum. Then, the crack of other parts has different rate variations. The calculation and simulation results fit well with the experimental ones, which verifies the validity of energy estimation and updated finite element analysis. Impact loading usually induces materials and accelerates the fatigue crack growth. |
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| Keywords: | crack propagation Mg-Li alloys impact load finite element |
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