| 纳米晶材料变形行为的微观力学分析 |
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| 引用本文： | 兰姣霞,洪友士.纳米晶材料变形行为的微观力学分析[J].固体力学学报,2010,31(1). |
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| 作者姓名： | 兰姣霞 洪友士 |
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| 作者单位： | 1. 军事交通学院基础部,天津,300161
2. 中国科学院力学研究所非线性力学国家重点实验室,北京,100190 |
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| 基金项目： | 国家自然科学基金项目(10772178,10721202)资助 |
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| 摘 要： | 将纳米晶材料视为包括晶粒和晶界的两相复合材料.基于能量平衡概念推导出纳米晶材料的增量本构关系.最后将本文发展的模型用于纯铜的单轴拉伸实验,讨论了晶粒大小、形状和晶粒分布的影响,并将模型预测的结果和已有的实验结果进行比较.
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| 关 键 词： | 纳米晶材料 微观力学 应变能 纯铜 |
MICROMECHANICS ANALYSIS FOR DEFORMATION BEHAVIOR OF NANOCRYSTALLINE MATERIALS |
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| Jiaoxia Lan,Youshi Hong.MICROMECHANICS ANALYSIS FOR DEFORMATION BEHAVIOR OF NANOCRYSTALLINE MATERIALS[J].Acta Mechnica Solida Sinica,2010,31(1). |
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| Authors: | Jiaoxia Lan Youshi Hong |
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| Abstract: | Nanocrystalline(NC) materials can be treated as composite materials consisting of two phases,i.e.grain domain and grain boundary.In this paper,the incremental stress-strain relation is derived from the view point of energy balance.As a result,the stress-strain relation of different grain sizes is obtained,and also applied to the case of pure copper under uniaxial tension.In addition,the effects of grain shape and statistical distribution of grain sizes on the stress-strain relation are discussed,and the res... |
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| Keywords: | nanocrystalline materials micromechanics strain energy pure copper |
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