Knowledge Management System of Institue of Mechanics, CAS
| On the unstable stacking criterion for ideal and cracked copper-crystals | |
Zhang YW(张永伟); Wang ZQ(王自强) ; Tang QH(汤奇恒); ZHANG, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.
| |
| Source Publication | Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties
 |
| 1995 | |
| Volume | 72Issue:4Pages:881-889 |
| ISSN | 0141-8610 |
| Abstract | The unstable stacking criteria for an ideal copper crystal under homogeneous shearing and for a cracked copper crystal under pure mode II loading are analysed. For the ideal crystal under homogeneous shearing, the unstable stacking energy gamma(us) defined by Rice in 1992 results from shear with no relaxation in the direction normal to the slip plane. For the relaxed shear configuration, the critical condition for unstable stacking does not correspond to the relative displacement Delta = b(p)/2, where b(p) is the Burgers vector magnitude of the Shockley partial dislocation, but to the maximum shear stress. Based on this result, the unstable stacking energy Gamma(us) is defined for the relaxed lattice. For the cracked crystal under pure mode II loading, the dislocation configuration corresponding to Delta = b(p)/2 is a stable state and no instability occurs during the process of dislocation nucleation. The instability takes place at approximately Delta = 3b(p)/4. An unstable stacking energy Pi(us) is defined which corresponds to the unstable stacking state at which the dislocation emission takes place. A molecular dynamics method is applied to study this in an atomistic model and the results verify the analysis above. |
| Keyword | Dislocation Nucleation Metals Tip |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:A1995TE28300005 |
| WOS Keyword | DISLOCATION NUCLEATION ; METALS ; TIP |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/39180 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | ZHANG, YW (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA. |
| Recommended Citation GB/T 7714 | Zhang YW,Wang ZQ,Tang QH,et al. On the unstable stacking criterion for ideal and cracked copper-crystals[J]. Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties,1995,72,4,:881-889. |
| APA | Zhang YW,Wang ZQ,Tang QH,&ZHANG, YW .(1995).On the unstable stacking criterion for ideal and cracked copper-crystals.Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties,72(4),881-889. |
| MLA | Zhang YW,et al."On the unstable stacking criterion for ideal and cracked copper-crystals".Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties 72.4(1995):881-889. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| ja186.pdf（2102KB） | 开放获取 | -- | View Download | |||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment