Dilatancy of Shear Transformations in a Colloidal Glass

doi:10.1103/PhysRevApplied.9.014023

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	Dilatancy of Shear Transformations in a Colloidal Glass
	Lu YZ ; Jiang MQ(蒋敏强); Lu X; Qin ZX ; Huang YJ; Shen J
刊名	PHYSICAL REVIEW APPLIED
	2018-01-19
卷号	9 期号:1 页码:14023
ISSN号	2331-7019
DOI	10.1103/PhysRevApplied.9.014023
英文摘要	Shear transformations, as fundamental rearrangement events operating in local regions, hold the key of plastic flow of amorphous solids. Despite their importance, the dynamic features of shear transformations are far from clear, which is the focus of the present study. Here, we use a colloidal glass under shear as the prototype to directly observe the shear-transformation events in real space. By tracing the colloidal-particle rearrangements, we quantitatively determine two basic properties of shear transformations: local shear strain and dilatation (or free volume). It is revealed that the local free volume undergoes a significantly temporary increase prior to shear transformations, eventually leading to a jump of local shear strain. We clearly demonstrate that shear transformations have no memory of the initial free volume of local regions. Instead, their emergence strongly depends on the dilatancy ability of these local regions, i.e., the dynamic creation of free volume. More specifically, the particles processing the high dilatancy ability directly participate in subsequent shear transformations. These results experimentally enrich Argon's statement about the dilatancy nature of shear transformations and also shed insight into the structural origin of amorphous plasticity.
分类号	二类/Q1
URL标识	查看原文
WOS关键词	METALLIC GLASSES ; PLASTIC-FLOW ; FREE-VOLUME ; VISCOPLASTIC DEFORMATION ; AMORPHOUS SOLIDS ; BUBBLE RAFT ; DYNAMICS ; ALLOYS ; MODEL
WOS研究方向	Physics, Applied
语种	英语
WOS记录号	WOS:000423327200003
资助机构	National Natural Science Foundation of China [11522221, 51401041, 11372315, 51671042, 51671070, 51274151] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040303] ; China Postdoctoral Science Foundation [2015M570242] ; Basic Research Program of the Key Lab in Liaoning Province Educational Department [LZ2015011]
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/77794]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.[Lu, Y. Z. 2.Lu, X. 3.Qin, Z. X.] Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China 4.[Jiang, M. Q.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 5.[Jiang, M. Q.] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 6.[Huang, Y. J.] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China 7.[Shen, J.] Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China
推荐引用方式 GB/T 7714	Lu YZ,Jiang MQ,Lu X,et al. Dilatancy of Shear Transformations in a Colloidal Glass[J]. PHYSICAL REVIEW APPLIED,2018,9(1):14023.
APA	Lu YZ,蒋敏强,Lu X,Qin ZX,Huang YJ,&Shen J.(2018).Dilatancy of Shear Transformations in a Colloidal Glass.PHYSICAL REVIEW APPLIED,9(1),14023.
MLA	Lu YZ,et al."Dilatancy of Shear Transformations in a Colloidal Glass".PHYSICAL REVIEW APPLIED 9.1(2018):14023.