Plastic-strain-dependent strength model to simulate the cracking process of brittle rocks with an existing non-persistent joint

doi:10.1016/j.enggeo.2017.10.008

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院页岩气与地质工程重点实验室

	Plastic-strain-dependent strength model to simulate the cracking process of brittle rocks with an existing non-persistent joint
	Guo, Songfeng 1,2; Qi, Shengwen 1,2; Zhan, Zhifa 3; Zheng, Bowen 1,2
刊名	ENGINEERING GEOLOGY
	2017-12-14
卷号	231 页码:114-125
关键词	Cracking Process Progressive Failure Plastic-strain-dependent Strength Model Non-persistent Joint Brittle Rock
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2017.10.008
文献子类	Article
英文摘要	Brittle rock failure has been extensively studied for decades and is recognized as a process of crack initiation, propagation, and coalescence. However, the cracking mechanism is still not fully understood. Numerical approaches are generally used to study the cracking process of rocks with pre-existing joints. The strength model of the rock matrix is crucial and should be adopted appropriately in numerical studies. This paper presents a plastic-strain-dependent strength model of brittle rocks based on a series of cyclic loading unloading compression tests and Brazilian tension tests in the laboratory. The detailed steps used to obtain the mechanical parameters quantitatively during progressive failure are presented. It is shown experimentally that both the shear strength parameters and tensile strength vary during the failure process, i.e., cohesion weakening, frictional strength mobilization, and tensile strength loss (CWFS-TL). The model is then implemented in Fast Lagrangian Analysis of Continua in 3 Dimensions (FLAC(3D)) to represent the properties of the rock matrix, and the interface element in the software is adopted to simulate the non-persistent joint. Two types of numerical experiments are conducted on specimens with a pre-existing non-persistent joint: a direct tension experiment on a specimen with a horizontal joint and a uniaxial compression experiment on a specimen with an inclined joint. It is found that the cracking process in the numerical experiments can capture nearly all the features of physical experiments under the same conditions in the laboratory, and the numerical results also agree quantitatively with the theoretical solution. It seems that the approach can be widely used to study brittle rock masses with a non-persistent joint.
WOS关键词	UNIAXIAL COMPRESSION ; FRACTURE COALESCENCE ; NUMERICAL-SIMULATION ; ELEMENT METHOD ; BRAZILIAN TEST ; HARD-ROCK ; FAILURE ; PROPAGATION ; MARBLE ; DAMAGE
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000418975600012
资助机构	National Science Foundation of China(41672307 ; National Science Foundation of China(41672307 ; China Postdoctoral Science Foundation(2017T100106 ; China Postdoctoral Science Foundation(2017T100106 ; 41702345) ; 41702345) ; 2015M581167) ; 2015M581167) ; National Science Foundation of China(41672307 ; National Science Foundation of China(41672307 ; China Postdoctoral Science Foundation(2017T100106 ; China Postdoctoral Science Foundation(2017T100106 ; 41702345) ; 41702345) ; 2015M581167) ; 2015M581167) ; National Science Foundation of China(41672307 ; National Science Foundation of China(41672307 ; China Postdoctoral Science Foundation(2017T100106 ; China Postdoctoral Science Foundation(2017T100106 ; 41702345) ; 41702345) ; 2015M581167) ; 2015M581167) ; National Science Foundation of China(41672307 ; National Science Foundation of China(41672307 ; China Postdoctoral Science Foundation(2017T100106 ; China Postdoctoral Science Foundation(2017T100106 ; 41702345) ; 41702345) ; 2015M581167) ; 2015M581167)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93166]
专题	地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者	Qi, Shengwen
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Highway Engn Consulting Corp, Beijing 100089, Peoples R China
推荐引用方式 GB/T 7714	Guo, Songfeng,Qi, Shengwen,Zhan, Zhifa,et al. Plastic-strain-dependent strength model to simulate the cracking process of brittle rocks with an existing non-persistent joint[J]. ENGINEERING GEOLOGY,2017,231:114-125.
APA	Guo, Songfeng,Qi, Shengwen,Zhan, Zhifa,&Zheng, Bowen.(2017).Plastic-strain-dependent strength model to simulate the cracking process of brittle rocks with an existing non-persistent joint.ENGINEERING GEOLOGY,231,114-125.
MLA	Guo, Songfeng,et al."Plastic-strain-dependent strength model to simulate the cracking process of brittle rocks with an existing non-persistent joint".ENGINEERING GEOLOGY 231(2017):114-125.