Generalized crack damage stress thresholds of hard rocks under true triaxial compression

doi:10.1007/s11440-019-00900-z

	Generalized crack damage stress thresholds of hard rocks under true triaxial compression
	Gao, Yaohui 1,3; Feng, Xia-Ting 2,3; Zhang, Xiwei 2; Zhou, Yangyi 2; Zhang, Yan 2
刊名	ACTA GEOTECHNICA
	2020-03-01
卷号	15 期号:3 页码:565-580
关键词	Crack damage stress thresholds Deformation Hard rocks True triaxial compression test Volumetric strain curves
ISSN号	1861-1125
DOI	10.1007/s11440-019-00900-z
英文摘要	The rock failure process can be characterized by several distinct stress thresholds: the crack closure stress sigma(cc), crack initiation stress sigma(ci), crack damage stress sigma(cd) and peak stress sigma(p). Seventy-one true triaxial compression tests were conducted to investigate the crack damage stress sigma(cd), which is the stress at the onset of unstable crack development and dilation. Two empirical models are developed to predict the crack damage stress sigma(cd) using the intermediate principal stress sigma(2) and the minimum principal stress sigma(3). In addition, the proposed models are validated by ten results derived from the German Continental Deep Drilling Program (KTB) deep hole amphibolite. A comparison with other failure criteria also indicates the accuracy and simplicity of the proposed models. The proposed composite models show that the crack damage stress sigma(cd) gradually increases with increasing intermediate principal stress sigma(2) and minimum principal stress sigma(3). The physical meanings and ranges of six material parameters are analyzed and explained. Both the influence of the tangent Young's modulus E and strain characteristics on the crack damage stress sigma(cd) and the inhomogeneity of the tested specimens are discussed in this paper.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC016] ; 111 Project[B17009] ; National Natural Science Foundation of China[51621006] ; Chinese Scholarship Council[(2018)3101]
WOS研究方向	Engineering
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000525442700002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23899]
专题	中科院武汉岩土力学所
通讯作者	Feng, Xia-Ting
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yaohui,Feng, Xia-Ting,Zhang, Xiwei,et al. Generalized crack damage stress thresholds of hard rocks under true triaxial compression[J]. ACTA GEOTECHNICA,2020,15(3):565-580.
APA	Gao, Yaohui,Feng, Xia-Ting,Zhang, Xiwei,Zhou, Yangyi,&Zhang, Yan.(2020).Generalized crack damage stress thresholds of hard rocks under true triaxial compression.ACTA GEOTECHNICA,15(3),565-580.
MLA	Gao, Yaohui,et al."Generalized crack damage stress thresholds of hard rocks under true triaxial compression".ACTA GEOTECHNICA 15.3(2020):565-580.