| 岳珠峰,吕震宙.各向异性双晶和三晶体弹塑性应力场分析[J].计算力学学报,1999,16(4):445~452 |
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| 各向异性双晶和三晶体弹塑性应力场分析 |
| Elastic-plastic stress distribution in anisotropic bicrystals and tricrystals |
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| DOI：10.7511/jslx19994074 |
| 中文关键词: 晶体滑移 有限元 应力结构 滑移系 弹塑性 |
| 英文关键词:crystallographic finite element,bicrystal,tricrystal,stress distribution |
| 基金项目:国家自然科学青年基金，航空科学基础研究基金，西安交通大学力学开放实验室开放基金 |
| 岳珠峰 吕震宙 |
| 西北工业大学工程力学系!西安710072 |
| 摘要点击次数: 1510 |
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| 中文摘要: |
| 用三维弹塑性晶体滑移有限元程序对不同晶体取向的双昌和三晶体在昌界和三晶交点处的应力集中科技司和滑激活规律进行了计算分析。双晶体在计算时考虑取向的影响，计算结果表明，晶界处应力有较大的出现复杂的变化规律，这种规律与晶体取向相关；三晶交点和晶界使得三晶体应力重新分布，三晶交点可能是应力集中之地，但也可能不造成应力集中，这主要与三个晶体取向相关。本文计算表明，只有仔细地研究细观过程，才能准确理解金属材料 |
| 英文摘要: |
| The crystallographic finite element method has been used in the analysis of the elastic\|plastic distributions in anisotropic bicrystals and tricrytals, taking the different crystallographic orientations into consideration. The results of bicrystal model, considering the different crystallographic orientations, shows that there are stress concentrations near the boundaries. The features of stress concentrations are dependent on the crystallographic orientations of the two grains. The existing of triple junctions in the tricrystals may result in the stress concentrations, may not, depending on the crystallographic orientations of the three grains. The work of the paper shows that it is only by the detail study of the stress distribution that the metal fracture can be understood deeply. |
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