| 多尺度材料模拟及其在含缺陷材料中的应用 |
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| 引用本文： | 张瀛,曲绍兴.多尺度材料模拟及其在含缺陷材料中的应用[J].华南农业大学学报(社会科学版),2011,29(1). |
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| 作者姓名： | 张瀛 曲绍兴 |
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| 作者单位： | 浙江大学航空航天学院; |
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| 基金项目： | 国家自然科学基金资助项目(10702062) |
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| 摘 要： | 多尺度建模与模拟是研究金属及合金特别是纳米结构晶体材料力学性能的重要手段。最近发展的有限温度下动态原子/离散位错耦合材料模拟方法,可进行跨原子、细观、宏观尺度的含缺陷晶体材料力学性能研究。文章应用该方法进行了微米尺寸含裂纹的fcc铝单晶材料在Ⅰ型断裂过程中的变形情况分析,获得了导致裂纹尖端发射位错的临界应力强度因子与温度及裂纹前端厚度之间的关系。
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| 关 键 词： | 材料学 多尺度耦合 分子动力学 离散位错 有限元 |
Multiscale Materials Modeling Method and Its Application in Materials with Defects |
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| ZHANG Ying,QU Shao-xing.Multiscale Materials Modeling Method and Its Application in Materials with Defects[J].Journal of South China Agricultural University:Social Science Edition,2011,29(1). |
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| Authors: | ZHANG Ying QU Shao-xing |
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| Institution: | ZHANG Ying,QU Shao-xing(School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | Multiscale modeling and simulation is an important method to study the mechanical properties of metals and alloys,especially nanostructured crystals.The newly developed finite-temperature dynamic coupled atomistic/discrete dislocation method can be used to study the mechanical properties of crystalline materials with defects across micro,meso and macro scales.The above method is applied to investigate the deformation process of micro-sized single crystalline fcc.aluminum with a through-thickness crack subje... |
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| Keywords: | materials mulitiscale coupling molecular dynamics discrete dislocation finite element method |
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