| 亚微米尺度晶体反常规塑性行为的离散位错研究进展 |
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| 引用本文： | 庄茁,崔一南,高原,柳占立.亚微米尺度晶体反常规塑性行为的离散位错研究进展[J].力学进展,2011,41(6):647-667. |
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| 作者姓名： | 庄茁 崔一南 高原 柳占立 |
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| 作者单位： | 1. 清华大学航空航天学院;2. 清华大学航天航空学院; |
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| 基金项目： | 国家自然科学基金重点项目(11132006); 国家重点基础研究项目(973计划)(2010CB631005)资助~~ |
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| 摘 要： | 近十年来, 随着实验技术的发展, 人们对亚微米尺度晶体材料塑性行为的研究和认识不断深入, 实验观测到许多由离散位错主导的新的应力\!--\!应变现象, 它们是基于宏观尺度的经典塑性理论和基于微米尺度的应变梯度塑性理论所无法阐释的. 研究者们试图寻求新的理论模型和计算方法, 提出了考虑位错近程相互作用由背应力主导的缺陷能理论和以离散位
错动力学为代表的亚微米尺度晶体塑性计算方法, 旨在描述位错形核、增殖、匮乏和湮灭, 揭示该尺度下塑性流动的机理. 本文从实验观测数据、理论分析模型、离散位错动力学及其与之耦合的连续介质力学计算方法等方面, 综述了亚微米尺度晶体反常规塑性行为的离散位错研究进展.
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| 关 键 词： | 亚微米尺度实验 晶体塑性理论 离散位错动力学 有限元 本构关系 |
| 收稿时间： | 2010-11-11 |
| 修稿时间： | 2011-10-14 |
ADVANCES IN DISCRETE DISLOCATION MECHANISM ON SUBMICRO CRYSTAL ATYPICAL PLASTICITY |
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| ZHUANG Zhuo CUI Yinan GAO Yuan LIU Zhanli Lab.of Applied Mechanics,Ministry of Education,School of Aerospace,Tsinghua University,Beijing ,China.ADVANCES IN DISCRETE DISLOCATION MECHANISM ON SUBMICRO CRYSTAL ATYPICAL PLASTICITY[J].Advances in Mechanics,2011,41(6):647-667. |
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| Authors: | ZHUANG Zhuo CUI Yinan GAO Yuan LIU Zhanli Labof Applied Mechanics Ministry of Education School of Aerospace Tsinghua University Beijing China |
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| Affiliation: | 1. ;2. Department of Engineering Mechanics, School of Aerospace, Tsinghua University, 100084 Beijing, China; |
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| Abstract: | In recent ten years,with the rapid development of experimental technology,the crystal plastic behavior in sub-micron scale has been well investigated.Numbers of atypical experimental data and theoretical results are revealed.However,they could not be explained by the classical plastic theory in a macro-scale and strain gradient plastic theory in a micro-scale.There are many scientific issues to be resolved.To further investigate the physical nature behind these phenomena,the researchers are trying to find t... |
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| Keywords: | sub-micron scale experiment crystal plasticity theory discrete dislocation dynamics finite element method constitutive relation |
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