Atomic-level structural identification for prediction of localized shear deformation in metallic glasses
文献类型：期刊论文
| 作者 | Shi RH(史荣豪)1,2; Xiao P(肖攀)2 ; Yang R(杨荣)2; Bai YL(白以龙)2
|
| 刊名 | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
 |
| 出版日期 | 2020-05-15 |
| 卷号 | 191页码:363-369 |
| ISSN号 | 0020-7683 |
| 关键词 | Metallic glasses Shear transformation zones Nonaffine displacement Molecular simulations Dynamical matrix |
| DOI | 10.1016/j.ijsolstr.2020.01.012 |
| 通讯作者 | Xiao, Pan(xiaopan@lnm.imech.ac.cn) |
| 英文摘要 | Unlike obviously topological defects in crystals, "defect" identification in metallic glasses (MGs) is still controversial and under investigation. Based on molecular simulations and analysis of MG samples, a structural parameter related to the Laplacian of local equivalent stiffness is proposed for prediction of localized shear deformation in MGs. It is found that local regions with the parameter of positive and relatively large value represent several particular modes of "stiffness valleys" in initial configuration which will strengthen local shear deformation and lead to the formation of shear transformation zones (STZs). More than 80% of the locations where STZs are formed in six types of MG samples under athermal quasi-static shear deformation match well with the regions predicted by the parameter calculated from initial configuration of the samples. The parameter not only reveals the relationship among local heterogeneity, nonaffine displacement, and shear localization, but also provides an efficient way for predicting the activation of STZs in MGs. (C) 2020 Elsevier Ltd. All rights reserved. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | PLASTIC-DEFORMATION ; BEHAVIOR |
| 资助项目 | National Natural Science Foundation of China[11790292] ; National Natural Science Foundation of China[11672298] ; National Natural Science Foundation of China[11432014] ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences[XDB22040501] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:000526811800029 |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences |
| 其他责任者 | Xiao, Pan |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/81906]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Shi RH,Xiao P,Yang R,et al. Atomic-level structural identification for prediction of localized shear deformation in metallic glasses[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2020,191:363-369. |
| APA | 史荣豪,肖攀,杨荣,&白以龙.(2020).Atomic-level structural identification for prediction of localized shear deformation in metallic glasses.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,191,363-369. |
| MLA | 史荣豪,et al."Atomic-level structural identification for prediction of localized shear deformation in metallic glasses".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 191(2020):363-369. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。