| 不均匀变形对空洞长大影响的有限元分析 |
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| 引用本文： | 刘文辉,李茂华,伍先明. 不均匀变形对空洞长大影响的有限元分析[J]. 湖南科技大学学报(自然科学版), 2010, 25(1) |
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| 作者姓名： | 刘文辉 李茂华 伍先明 |
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| 作者单位： | 湖南科技大学,机电学院,湖南,湘潭411201 |
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| 基金项目： | 国家自然科学基金，湖南省教育厅项目，湖南科技大学博士科研启动基金 |
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| 摘 要： | 为了分析FCC晶体中不均匀变形对空洞长大的影响,运用率相关晶体有限元,采用一个3D模型研究了FCC晶体中空洞的长大行为,对比分析了单晶和晶界上球形空洞长大的情况.模拟结果表明:晶界上的等效塑性应变大于单晶中的等效应变,晶界上空洞的长大速度大于单晶中空洞的长大速度,表明空洞易沿着晶界长大;随着晶粒间力学性能差异的增加,晶粒间不均匀变形更加明显,空洞越易沿着晶界长大.
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| 关 键 词： | 空洞 长大 晶体塑性 有限元 |
FEM analysis of the effects of heterogeneous deformation on void growth |
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| LIU Wen-hui,LI Mao-hua,WU Xian-ming. FEM analysis of the effects of heterogeneous deformation on void growth[J]. Journal of Hunan University of Science & Technology(Natural Science Editon), 2010, 25(1) |
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| Authors: | LIU Wen-hui LI Mao-hua WU Xian-ming |
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| Affiliation: | LIU Wen-hui,LI Mao-hua,WU Xian-ming (College of Electromechanical Engineering,Hunan University of Science , Technology,Xiangtan 411201,China) |
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| Abstract: | To investigate the effects of heterogeneous deformation on void growth in FCC crystals,a 3D model was used to study the growth behavior of voids in FCC crystals with the rate dependent crystal plasticity finite element method,and the growth behaviors of voids in single crystals and voids at grain boundary were compared.Simulation results showthat the equivalent plastic deformation along the grain boundary is larger than that in single crystals,and the growth rate of voids at the grain boundary of the two-gr... |
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| Keywords: | void growth crystal plasticity FEM |
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