Atomic-level structural identification for prediction of localized shear deformation in metallic glasses

doi:10.1016/j.ijsolstr.2020.01.012

IMECH-IR > 非线性力学国家重点实验室

	Atomic-level structural identification for prediction of localized shear deformation in metallic glasses
	Shi RH(史荣豪)1,2; Xiao P(肖攀)1 ; Yang R(杨荣)1 ; Bai YL(白以龙)1
通讯作者	Xiao, Pan(xiaopan@lnm.imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
	2020-05-15
卷号	191 页码:363-369
ISSN	0020-7683
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.
关键词	Metallic glasses Shear transformation zones Nonaffine displacement Molecular simulations Dynamical matrix
DOI	10.1016/j.ijsolstr.2020.01.012
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000526811800029
关键词[WOS]	PLASTIC-DEFORMATION ; BEHAVIOR
WOS研究方向	Mechanics
WOS类目	Mechanics
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]
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Xiao, Pan
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/81907
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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.

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