Experimental study on the damage process of marble under true triaxial pre-peak unloading conditions

doi:10.1177/10567895211020799

	Experimental study on the damage process of marble under true triaxial pre-peak unloading conditions
	Gao, Yaohui 1; Wang, Zhaofeng 2,3
刊名	INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
	2021-06-02
期号	-页码:16
关键词	True triaxial pre-peak unloading test damage evolution irreversible strains dissipated energy acoustic emission
ISSN号	1056-7895
DOI	10.1177/10567895211020799
英文摘要	Stress-induced instability is associated with rock damage. Here, the progressive brittle fracturing process in Jinping marble is studied by introducing two types of true triaxial pre-peak unloading tests, namely, the incrementally cyclic loading-unloading minimum principal stress test (ICM test) and the incrementally cyclic loading-unloading maximum and minimum principal stress test (ICMM test). By comprehensively analysing the irreversible strains, dissipated energy, acoustic emission (AE) characteristics and scanning electron microscopy (SEM) results, the rock damage evolution can be quantified and divided into two distinctive damage stages. At the boundary point, the irreversible strain increments reach their minimum values. In the gentle damage stage, the normalized irreversible strains increase linearly, and this process is associated with a small number of AE hits with low amplitude. The rapid damage stage is characterized by a nonlinear increase in the normalized irreversible strains, and this process is associated with a large number of AE hits with high amplitude. The dissipated energy mainly increases in the rapid damage stage. In addition, the rapid damage stage in the ICMM test mainly occurs in the last five cycles, due to the differences in the deviatoric stresses in each cycle. In both of these tests, the failure mode is principally characterized by tensile failure. Moreover, the precursory signals of rock fracturing and the influence of the loading paths on the strength are discussed.
资助项目	National Natural Science Foundation of China[51621006] ; National Natural Science Foundation of China[51839003] ; Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	SAGE PUBLICATIONS LTD
WOS记录号	WOS:000660925400001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27420]
专题	中科院武汉岩土力学所
作者单位	1.PowerChina Huadong Engn Corp Ltd, Hangzhou, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yaohui,Wang, Zhaofeng. Experimental study on the damage process of marble under true triaxial pre-peak unloading conditions[J]. INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,2021(-):16.
APA	Gao, Yaohui,&Wang, Zhaofeng.(2021).Experimental study on the damage process of marble under true triaxial pre-peak unloading conditions.INTERNATIONAL JOURNAL OF DAMAGE MECHANICS(-),16.
MLA	Gao, Yaohui,et al."Experimental study on the damage process of marble under true triaxial pre-peak unloading conditions".INTERNATIONAL JOURNAL OF DAMAGE MECHANICS .-(2021):16.