Dynamic three-dimensional imaging and digital volume correlation analysis to quantify shear bands in grus

doi:10.1016/j.mechmat.2020.103646

	Dynamic three-dimensional imaging and digital volume correlation analysis to quantify shear bands in grus
	Li, Chengsheng 1,3; Kong, Lingwei 1,3; Shu, Rongjun 1,3; An, Ran 1,3; Jia, Hongbiao 2
刊名	MECHANICS OF MATERIALS
	2020-12-01
卷号	151 页码:14
关键词	Grus Shear band Residual soil DVC CT
ISSN号	0167-6636
DOI	10.1016/j.mechmat.2020.103646
英文摘要	The meso-deformation evolution in grus is crucial to the mechanical characteristics. Although the macroscopic deformation of grus has been widely studied, its physical meso-scale deformation and shear band evolution have not been well understood. In this paper, high energy X-ray computed tomography (CT) measurements and digital volume correlation (DVC) were performed on a grus sample under triaxial compression in order to quantify shear strain and shear bands in grus. Besides, a series of three-dimensional octahedral shear strain was obtained by DVC analysis. Furthermore, the corresponding evolution of the shear band, content, distribution characteristics and connectivity were investigated. The results show that the shear bands are formed at the stage where the axial strain is equal to 8%; generally, they are obliquely distributed as a whole and connected in an irregular flat strip shape; besides, the failure path may cause the grains to divert or branch due to the anisotropic distribution of grains. Moreover, the octahedral shear strain approximation obeys the chi(2) distribution. There are at least two types of distribution of shear bands. Small-scale shear bands may be generated in different areas in the material at the initiation state, whereas the correlation and directionality between the variety of shear bands are slight; while at the shear failure stage and the subsequent stages, a close correlation is found between the shear bands, the direction consistency is significant.
资助项目	National Natural Science Foundation of China[11672320] ; National Natural Science Foundation of China[41372314]
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000600875500002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25382]
专题	中科院武汉岩土力学所
通讯作者	Kong, Lingwei
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.China Univ Geosci, Engn Fac, Wuhan 430074, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Chengsheng,Kong, Lingwei,Shu, Rongjun,et al. Dynamic three-dimensional imaging and digital volume correlation analysis to quantify shear bands in grus[J]. MECHANICS OF MATERIALS,2020,151:14.
APA	Li, Chengsheng,Kong, Lingwei,Shu, Rongjun,An, Ran,&Jia, Hongbiao.(2020).Dynamic three-dimensional imaging and digital volume correlation analysis to quantify shear bands in grus.MECHANICS OF MATERIALS,151,14.
MLA	Li, Chengsheng,et al."Dynamic three-dimensional imaging and digital volume correlation analysis to quantify shear bands in grus".MECHANICS OF MATERIALS 151(2020):14.