Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis

doi:10.1007/s00603-020-02286-x

	Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis
	Liu, Liwang 1,3; Li, Haibo 1,3; Li, Xiaofeng 1; Wu, Di 1,3; Zhang, Guokai 2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2020-11-20
页码	17
关键词	Crack initiation mechanisms Digital image correlation (DIC) analysis Wing cracks Anti-wing cracks Pre-existing flaw
ISSN号	0723-2632
DOI	10.1007/s00603-020-02286-x
英文摘要	Determination on underlying mechanisms of crack initiation is of vital importance to understand the failure processes of geomaterials in practical engineering. In this study, uniaxial compression experiments of granitic samples containing a single pre-existing flaw were conducted and the failure processes were recorded by using the high-speed camera. To quantitatively determine the crack initiation mechanism, a novel method was first proposed based on digital image correlation (DIC) analysis and then its validity was confirmed. By utilizing this method, three types of cracks with different initiation mechanisms were identified and the effect of flaw inclination angle on crack initiation mechanisms was discussed from the viewpoint of theoretical analysis. With the increase of inclination angles, wing cracks change from mixed mode I/II cracks to mode I cracks, while anti-wing cracks have no evident changes and are dominated by mode II cracks. Under compressive pressure, the upper and bottom surfaces of pre-existing flaw deform to each other and the distributions of full-field tangential stress around flaw are different, which might induce the variation of crack initiation mechanisms with regard to the inclination angle.
资助项目	National Natural Science Foundation of China[51439008] ; National Natural Science Foundation of China[51809137] ; National Natural Science Foundation of China[41525009] ; Natural Science Foundation of Jiangsu Province[BK 20180480]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000590944600001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25143]
专题	中科院武汉岩土力学所
通讯作者	Li, Xiaofeng
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Nanjing Univ Sci & Technol, Sch Mech Engn, Nanjing 210094, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Liwang,Li, Haibo,Li, Xiaofeng,et al. Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:17.
APA	Liu, Liwang,Li, Haibo,Li, Xiaofeng,Wu, Di,&Zhang, Guokai.(2020).Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis.ROCK MECHANICS AND ROCK ENGINEERING,17.
MLA	Liu, Liwang,et al."Underlying Mechanisms of Crack Initiation for Granitic Rocks Containing a Single Pre-existing Flaw: Insights From Digital Image Correlation (DIC) Analysis".ROCK MECHANICS AND ROCK ENGINEERING (2020):17.