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
Corresponding AuthorXiao, Pan(xiaopan@lnm.imech.ac.cn)
Source PublicationINTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
2020-05-15
Volume191Pages:363-369
ISSN0020-7683
AbstractUnlike 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.
KeywordMetallic glasses Shear transformation zones Nonaffine displacement Molecular simulations Dynamical matrix
DOI10.1016/j.ijsolstr.2020.01.012
Indexed BySCI ; EI
Language英语
WOS IDWOS:000526811800029
WOS KeywordPLASTIC-DEFORMATION ; BEHAVIOR
WOS Research AreaMechanics
WOS SubjectMechanics
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program (B) of the Chinese Academy of Sciences
Classification一类/力学重要期刊
Ranking1
ContributorXiao, Pan
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81907
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
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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