An approach to determining the thicknesses of shear bands with an echelon-crack structure

doi:10.1002/nag.1114

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	An approach to determining the thicknesses of shear bands with an echelon-crack structure
	Wang, G. S.; Kong, L. W.; Wei, C. F.
刊名	INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
	2013
卷号	37 期号:6 页码:618-640
关键词	shear band thickness echelon crack geomaterial
ISSN号	0363-9061
DOI	10.1002/nag.1114
英文摘要	In this paper, the internal structure of shear band is investigated, and a model of the shear band with an echelon crack structure is developed. The model assumes the shear band to be composed of two conjugate sets of echelon cracks, such that the smaller echelon cracks are embedded in the space of the larger ones. The additional strain induced by the echelon cracks and the anisotropic development of the compliance tensor in the shear band zone are analyzed. The critical crack density at the onset of shear band is obtained by applying the bifurcation condition. Deviating from previous approaches, the new procedure evaluates the thickness of shear band based on the geometrical characteristics of echelon crack arrays and the failure probability of grain boundaries in the longitudinal direction at the onset of shear band. Parametric analysis shows that grain size, internal friction angle, dilation angle, and failure probability of grain boundaries are the dominant factors that account for the shear band thickness. The calculated results are consistent with the experimental data available in the literature. The model soundly explains that the measurements of the shear band thickness are generally scattered, ranging from 4 to 30 (or even more) times the grain size. Copyright (c) 2011 John Wiley & Sons, Ltd.
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000317364400004
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3442]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Wang, G. S.,Kong, L. W.,Wei, C. F.. An approach to determining the thicknesses of shear bands with an echelon-crack structure[J]. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,2013,37(6):618-640.
APA	Wang, G. S.,Kong, L. W.,&Wei, C. F..(2013).An approach to determining the thicknesses of shear bands with an echelon-crack structure.INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,37(6),618-640.
MLA	Wang, G. S.,et al."An approach to determining the thicknesses of shear bands with an echelon-crack structure".INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS 37.6(2013):618-640.