Elastic criterion for shear-banding instability in amorphous solids

doi:10.1103/PhysRevE.105.045003

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Elastic criterion for shear-banding instability in amorphous solids
	Wang, X. J.3,4,5; Lu, Y. Z.4; Lu, X.4; Huo, J. T.2; Wang, Y. J.3,5; Wang, W. H.1; Dai, L. H.3,5; Jiang, M. Q.3,5
刊名	PHYSICAL REVIEW E
	2022-04-25
卷号	105 期号:4 页码:9
ISSN号	2470-0045
DOI	10.1103/PhysRevE.105.045003
通讯作者	Lu, Y. Z.(luyz@djtu.edu.cn)
英文摘要	In amorphous solids, plastic flow is prone to localization into shear bands via an avalanche of sheartransformation (ST) rearrangements of constituent atoms or particles. However, such banding instability still remains a lack of direct experimental evidence. Using a real 3D colloidal glass under shear as proof of principle, we study STs??? avalanches into shear banding that is controlled by strain rates. We demonstrate that, accompanying the emergent shear banding, the elastic response fields of the system, typical of a quadrupole for shear and a centrosymmetry for dilatation, lose the Eshelby-type spatial symmetry; instead, a strong correlation appears preferentially along the banding direction. By quantifying the fields??? spatial decay, we identify an elastic criterion for the shear-banding instability, that is, the strongly correlated length of dilatation is smaller than the full length of shear correlation. Specifically, ST-induced free volume has to be confined within the elastic shear domain of ST so that those STs can self-organize to trigger shear banding. This physical picture is directly visualized by tracing the real-space evolution of local dilatation and ST particles. The present work unites the two classical mechanisms: free volume and STs, for the fundamental understanding of shear banding in amorphous solids.
资助项目	National Natural Science Foundation of China (NSFC)[11988102] ; NSFC National Outstanding Youth Science Fund Project[12125206] ; NSFC[51971047] ; NSFC[11972345] ; NSFC[11790292]
WOS关键词	INHOMOGENEOUS FLOW ; DEFORMATION ; ORIGIN ; FIELD
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000796375200012
资助机构	National Natural Science Foundation of China (NSFC) ; NSFC National Outstanding Youth Science Fund Project ; NSFC
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89420]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Lu, Y. Z.
作者单位	1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China 5.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, X. J.,Lu, Y. Z.,Lu, X.,et al. Elastic criterion for shear-banding instability in amorphous solids[J]. PHYSICAL REVIEW E,2022,105(4):9.
APA	Wang, X. J..,Lu, Y. Z..,Lu, X..,Huo, J. T..,Wang, Y. J..,...&Jiang, M. Q..(2022).Elastic criterion for shear-banding instability in amorphous solids.PHYSICAL REVIEW E,105(4),9.
MLA	Wang, X. J.,et al."Elastic criterion for shear-banding instability in amorphous solids".PHYSICAL REVIEW E 105.4(2022):9.