| Origin of stress overshoot in amorphous solids | |
Jiang MQ(蒋敏强) ; Wilde G; Dai LH(戴兰宏); Jiang, MQ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
| |
| Source Publication | MECHANICS OF MATERIALS
 |
| 2015-02 | |
| Volume | 81Pages:72-83 |
| ISSN | 0167-6636 |
| Abstract | Based on the shear-transformation-zone (STZ) theory, we propose a constitutive model for describing homogeneous elastoplastic deformation of amorphous solids where the interaction of shear transformations and free volume dynamics is incorporated. This theoretical model can reproduce the stress overshoot behavior that shows the dependence of strain rate, temperature, STZ population and dilatancy of systems. It reveals that the stress overshoots its steady state value due to the delayed activation of shear transformations that results from the insufficient free volume in the system. However, the subsequent strain softening (stress drop) is attributed to the shear-induced dilatation that is a result of the positive interplay between shear transformations and free volume creation, the latter playing the dominant role. Our analysis also demonstrates that the STZs, as basic carriers of amorphous plasticity, govern the yielding of the system, whereas the free volume dynamics significantly affects the post-yielding behaviors. (C) 2014 Elsevier Ltd. All rights reserved. |
| Keyword | Amorphous Solid Plastic Flow Stress Overshoot Shear Transformation Zone Free Volume |
| Subject Area | Materials Science ; Mechanics |
| DOI | 10.1016/j.mechmat.2014.10.002 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000348255300007 |
| Funding Organization | This work was supported by the National Nature Science Foundation of China (Grant Nos 11372315, 11132011 and 11023001) and the National Key Research Program of China (Grant No 2012CB937500). MQJ acknowledges the Alexander von Humboldt Foundation for support with a research fellowship. GW acknowledges the support by DFG. LHD acknowledges the CAS/SAFEA International Partnership Program for Creative Research Teams. |
| Department | LNM冲击动力学与新型材料力学性能 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49613 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Jiang, MQ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Jiang MQ,Wilde G,Dai LH,et al. Origin of stress overshoot in amorphous solids[J]. MECHANICS OF MATERIALS,2015,81:72-83. |
| APA | 蒋敏强,Wilde G,戴兰宏,&Jiang, MQ .(2015).Origin of stress overshoot in amorphous solids.MECHANICS OF MATERIALS,81,72-83. |
| MLA | 蒋敏强,et al."Origin of stress overshoot in amorphous solids".MECHANICS OF MATERIALS 81(2015):72-83. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| IMCAS-J2015-024.pdf（3071KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment