Elastic interactions of plastic events in strained amorphous solids before yield
文献类型：期刊论文
| 作者 | Duan, J.; Wang, Y. J.; Dai, L. H.; Jiang, M. Q.2 ; Dai LH(戴兰宏); Jiang MQ(蒋敏强); Jiang MQ(蒋敏强); Wang YJ(王云江)
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| 刊名 | PHYSICAL REVIEW MATERIALS
 |
| 出版日期 | 2023-01-03 |
| 卷号 | 7期号:1页码:15 |
| ISSN号 | 2475-9953 |
| DOI | 10.1103/PhysRevMaterials.7.013601 |
| 通讯作者 | Jiang, M. Q.(mqjiang@imech.ac.cn) |
| 英文摘要 | It has been widely accepted that the plastic events of amorphous solids after mechanical yield belong to a highly correlated avalanche state. However, whether the plastic events before yield are correlated or not is still unsettled, leaving their interactions largely unexplored. In this paper, by means of atomistic simulations, typical Cu50Zr50 metallic glasses, as the model system, are sheared under athermal quasistatic limit to study these plastic events. The statistical analysis of both stress drops and waiting times reveals that plastic events before yield are in the correlated avalanche state and the interactions among them are mediated by the robust elasticity. The temporal correlation analysis of the nonaffine displacement fields further reveals that the elastic interactions are short-lived strong but long-standing weak, which results in the fractal morphology of potential energy landscape. By introducing vibrational modes to explore plastic events, we clearly exhibit the way how the elastic interactions organize the Eshelby-type shear transformations into avalanched plastic events. The correlation matrix, with its component being the dot product of the vibrational modes at different configurations, is defined to trace the evolution of vibrational modes during elastic deformation and across plastic events. Three reasons accounting for the robust elasticity are identified: (i) the limited destruction of plastic events on global elasticity, (ii) the persistent hard spots embedded in elastic matrix, and (iii) the self-recovery of elastic matrix during elastic deformation. Our results clarify the atomic-scale nature of both elastic deformation and plastic instabilities before yield in amorphous solids, providing fundamental information for the development of elastoplastic constitutive models. |
| WOS关键词 | INHOMOGENEOUS FLOW ; SHEAR BANDS ; DEFORMATION ; AVALANCHES ; ORIGIN ; INSTABILITY ; LIQUID ; LIMIT |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000909674300001 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91479]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 通讯作者 | Jiang, M. Q. |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, J.,Wang, Y. J.,Dai, L. H.,et al. Elastic interactions of plastic events in strained amorphous solids before yield[J]. PHYSICAL REVIEW MATERIALS,2023,7(1):15. |
| APA | Duan, J..,Wang, Y. J..,Dai, L. H..,Jiang, M. Q..,戴兰宏.,...&王云江.(2023).Elastic interactions of plastic events in strained amorphous solids before yield.PHYSICAL REVIEW MATERIALS,7(1),15. |
| MLA | Duan, J.,et al."Elastic interactions of plastic events in strained amorphous solids before yield".PHYSICAL REVIEW MATERIALS 7.1(2023):15. |
入库方式： OAI收割
来源：力学研究所
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