Knowledge Management System of Institue of Mechanics, CAS
A unified model for dislocation nucleation, dislocation emission and dislocation free zone | |
Wang ZQ(王自强); Wang KR(王克仁); Zhang YW(张永伟); Wang, TC (reprint author), CHINESE ACAD SCI,INST MECH,LNM,POB 603,BEIJING 100080,PEOPLES R CHINA. | |
Source Publication | International Journal of Fracture |
1996 | |
Volume | 78Issue:3-4Pages:227-239 |
ISSN | 0376-9429 |
Abstract | In this paper, a unified model for dislocation nucleation, emission and dislocation free zone is proposed based on the Peierls framework. Three regions are identified ahead of the crack tip. The emitted dislocations, located away from the crack tip in the form of an inverse pileup, define the plastic zone. Between that zone and the cohesive zone immediately ahead of the crack tip, there is a dislocation free zone. With the stress field and the dislocation density field in the cohesive zone and plastic zone being, respectively, expressed in the first and second Chebyshev polynomial series, and the opening and slip displacements in trigonometric series, a set of nonlinear algebraic equations can be obtained and solved with the Newton-Raphson Method. The results of calculations for pure shearing and combined tension and shear loading after dislocation emission are given in detail. An approximate treatment of the dynamic effects of the dislocation emission is also developed in this paper, and the calculation results are in good agreement with those of molecular dynamics simulations. |
Keyword | Crack-tip Fracture |
DOI | 10.1007/BF00032475 |
Indexed By | SCI |
Language | 英语 |
WOS ID | WOS:A1996VU18700003 |
WOS Keyword | CRACK-TIP ; FRACTURE |
WOS Research Area | Materials Science ; Mechanics |
WOS Subject | Materials Science, Multidisciplinary ; Mechanics |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/39086 |
Collection | 力学所知识产出(1956-2008) |
Corresponding Author | Wang, TC (reprint author), CHINESE ACAD SCI,INST MECH,LNM,POB 603,BEIJING 100080,PEOPLES R CHINA. |
Recommended Citation GB/T 7714 | Wang ZQ,Wang KR,Zhang YW,et al. A unified model for dislocation nucleation, dislocation emission and dislocation free zone[J]. International Journal of Fracture,1996,78,3-4,:227-239. |
APA | 王自强,王克仁,张永伟,&Wang, TC .(1996).A unified model for dislocation nucleation, dislocation emission and dislocation free zone.International Journal of Fracture,78(3-4),227-239. |
MLA | 王自强,et al."A unified model for dislocation nucleation, dislocation emission and dislocation free zone".International Journal of Fracture 78.3-4(1996):227-239. |
Files in This Item: | Download All | |||||
File Name/Size | DocType | Version | Access | License | ||
A059.pdf(550KB) | 开放获取 | -- | View Download |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment