| 含界面效应纳米尺度圆环形涂层中螺型位错分析 |
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| 引用本文： | 孙义刚,金波,方棋洪,刘又文.含界面效应纳米尺度圆环形涂层中螺型位错分析[J].固体力学学报,2010,31(4):325-331. |
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| 作者姓名： | 孙义刚 金波 方棋洪 刘又文 |
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| 作者单位： | 1. 湖南大学2. |
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| 基金项目： | 国家自然科学基金项目，国家博士后基金项目 |
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| 摘 要： | 研究了纳米尺度圆环形涂层(界面层)中螺型位错与圆形夹杂以及无限大基体材料的干涉效应.涂层与夹杂的界面和涂层与基体的界面均考虑界面应力效应.运用复势方法,获得了三个区域复势函数的解析解答.利用求得的应力场和Peach-Koehler公式,得到了作用在螺型位错上位错力的精确表达式.主要讨论了界面应力对涂层(界面层)中螺型位错运动和平衡稳定的影响规律.结果表明,界面应力对界面附近位错的运动有大的影响,由于界面应力的存在,可以改变涂层内位错与夹杂/基体干涉的引斥规律,并使位错在涂层内部产生三个稳定或非稳定的平衡点.考虑界面效应后,有一个额外的排斥力或吸引力作用在位错上,使原有的位错力增加或减小.
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| 关 键 词： | 螺型位错 界面应力 纳米尺度涂层 位错力 |
| 收稿时间： | 2009-07-06 |
ELASTIC ANALYSIS OF A SCREW DISLOCATION IN AN ANNULAR COATING LAYER WITH INTERFACE STRESSES |
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| Yigang Sun,Bo Jin,Qihong Fang,Youwen Liu.ELASTIC ANALYSIS OF A SCREW DISLOCATION IN AN ANNULAR COATING LAYER WITH INTERFACE STRESSES[J].Acta Mechnica Solida Sinica,2010,31(4):325-331. |
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| Authors: | Yigang Sun Bo Jin Qihong Fang Youwen Liu |
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| Institution: | Yigang Sun1 Bo Jin2 Qihong Fang2 Youwen Liu2 (1 Department of Urban Construction,Shaoyang University,Shaoyang,410205) (2 College of Mechanics and Aerospace,Hunan University,Changsha,410082) |
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| Abstract: | The interaction between a screw dislocation which locates in the nanoscale coating layer(interphase layer) with interface stresses and the circular particle and matrix is investigated.The analytical solutions of complex potential functions in the particle,the coating layer and the infinite matrix are derived by means of the complex variable method.With the aid of the Peach-Koehler formula,the explicit expression of the image force acting on the screw dislocation is given.The influence of the interface stres... |
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| Keywords: | screw dislocation interface stress nanoscale coating layer image force |
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