A generalized Peierls-Nabarro model for curved dislocations using discrete Fourier transform
文献类型：期刊论文
| 作者 | Wei, He1; Xiang, Yang2; Ming, Pingbing3
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| 刊名 | COMMUNICATIONS IN COMPUTATIONAL PHYSICS
 |
| 出版日期 | 2008-08-01 |
| 卷号 | 4期号:2页码:275-293 |
| 关键词 | dislocation Peierls-Nabarro model Peierls stress Peierls energy dislocation kink |
| ISSN号 | 1815-2406 |
| 英文摘要 | In this paper, we present a generalized Peierls-Nabarro model for curved dislocations using the discrete Fourier transform. In our model, the total energy is expressed in terms of the disregistry at the discrete lattice sites on the slip plane, and the elastic energy is obtained efficiently within the continuum framework using the discrete Fourier transform. Our model directly incorporates into the total energy both the Peierls energy for the motion of straight dislocations and the second Peierls energy for kink migration. The discreteness in both the elastic energy and the misfit energy, the full long-range elastic interaction for curved dislocations, and the changes of core and kink profiles with respect to the location of the dislocation or the kink are all included in our model. The model is presented for crystals with simple cubic lattice. Simulation results on the dislocation structure, Peierls energies and Peierls stresses of both straight and kinked dislocations are reported. These results qualitatively agree with those from experiments and atomistic simulations. |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000258445800003 |
| 出版者 | GLOBAL SCIENCE PRESS |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/6557]  |
| 专题 | 计算数学与科学工程计算研究所 |
| 通讯作者 | Wei, He |
| 作者单位 | 1.Peking Univ, Sch Math Sci, Beijing 100871, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Math, Kowloon, Hong Kong, Peoples R China 3.Chinese Acad Sci, Acad Math & Syst Sci, Inst Conputat Math & Sci Engn Comp, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, He,Xiang, Yang,Ming, Pingbing. A generalized Peierls-Nabarro model for curved dislocations using discrete Fourier transform[J]. COMMUNICATIONS IN COMPUTATIONAL PHYSICS,2008,4(2):275-293. |
| APA | Wei, He,Xiang, Yang,&Ming, Pingbing.(2008).A generalized Peierls-Nabarro model for curved dislocations using discrete Fourier transform.COMMUNICATIONS IN COMPUTATIONAL PHYSICS,4(2),275-293. |
| MLA | Wei, He,et al."A generalized Peierls-Nabarro model for curved dislocations using discrete Fourier transform".COMMUNICATIONS IN COMPUTATIONAL PHYSICS 4.2(2008):275-293. |
入库方式： OAI收割
来源：数学与系统科学研究院
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