| Nonclassical constitutive model involving void evolution of casting magnesium alloy |
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| 作者姓名： | 陈斌 彭向和 范镜泓 孙士涛 |
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| 作者单位： | College of Resource and Environment Science, Chongqing University, Chongqing 400044, China |
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| 基金项目： | Project（10572157） supported by the National Natural Science Foundation of China |
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| 摘 要： |
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| 关 键 词： | 铸造技术 镁合金 容积率 方程式 计算方法 |
| 收稿时间： | 2007-07-15 |
| 修稿时间： | 2007-09-10 |
Nonclassical constitutive model involving void evolution of casting magnesium alloy |
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| CHEN Bin, PENG Xiang-he, FAN Jing-hong, SUN Shi-tao.Nonclassical constitutive model involving void evolution of casting magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2007,17(A01):46-49. |
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| Authors: | CHEN Bin PENG Xiang-he FAN Jing-hong SUN Shi-tao |
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| Abstract: | The void evolution equation and the elastoplastic constitutive model of casting magnesium alloy were investigated. The void evolution equation consists of the void growth and the void nucleation equations. The void growth equation was obtained based on the continuous supposition of the material matrix, and the void nucleation equation was derived by assuming that the void nucleation follows a normal distribution. A softening function related to the void evolution was given. After the softening function was embedded to a nonclassical elastoplastic constitutive equation, a constitutive model involving void evolution was obtained. The numerical algorithm and the finite element procedure related to the constitutive model were developed and applied to the analysis of the distributions of the stress and the porosity of the notched cylindrical specimens of casting magnesium alloy ZL305. The computed results show satisfactory agreement with the experimental data. |
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| Keywords: | casting magnesium alloy void volume fraction void evolution equation constitutive model elastoplasticity |
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