Investigation of the anisotropy of black shale in dynamic tensile strength

doi:10.1007/s12517-018-3384-y

	Investigation of the anisotropy of black shale in dynamic tensile strength
	Shi, Xiaoshan 1,2,3; Liu, Da'an 1; Yao, Wei 3; Shi, Yirui 3; Tang, Tiewu 1,2; Wang, Bonan 4; Han, Weige 1,2
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2018
卷号	11 期号:2
关键词	Black Shale Tensile Strength Anisotropy Shpb Semi-circular Bending Test (Scb) Loading Angles Anisotropy Index
ISSN号	1866-7511
DOI	10.1007/s12517-018-3384-y
文献子类	Article
英文摘要	Shale usually exhibits strong anisotropy due to depositional environment and pre-existed microcracks caused by geological loading for a long time. Characterizing mechanical anisotropy properties of shale, especially the tensile strength anisotropy, plays an important role in the successful exploitation of shale gas. In this work, static and dynamic tests with semi-circular bending (SCB) specimen are conducted using hydraulic servo-control machine and modified split Hopkinson pressure bar (SHPB) system, respectively. To survey the tensile strength anisotropy of shale induced by stratification, samples are cored and cut into half by diametrical cutting along different angles relative to the stratification (0 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, C0 degrees). For dynamic tests, the utilization of pulse shaping technique ensures that the samples obtain dynamic equilibrium. The tensile strength values exhibit clear anisotropy under both static and dynamic loading conditions and show typical loading rate dependence at a given angle. An anisotropic index named alpha(k) is defined to describe the tensile strength anisotropy at a certain loading rate. The outcomes illustrate that the anisotropic index decreases as the loading rate increases. In addition, failure pattern owns different characteristic under different loading angles with respect to the stratification. These phenomena may be explained by the pre-existing microcracks, and cracks interaction during dynamic loading conditions.
WOS关键词	HOPKINSON PRESSURE BAR ; DIAMETRAL COMPRESSION ; LAYERED FORMATIONS ; NATURAL FRACTURES ; ROCK ; BEHAVIOR ; GRANITE
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000423618000030
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Youth Science Foundation of China(41602330) ; Youth Science Foundation of China(41602330) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Youth Science Foundation of China(41602330) ; Youth Science Foundation of China(41602330) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Youth Science Foundation of China(41602330) ; Youth Science Foundation of China(41602330) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Strategic Priority Research Program of the Chinese Academy of Sciences-Development of Fracture Seepage Microseismic Test Equipments(XDB10050200) ; Youth Science Foundation of China(41602330) ; Youth Science Foundation of China(41602330)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82614]
专题	中国科学院地质与地球物理研究所
通讯作者	Yao, Wei
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.Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada 4.China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Shi, Xiaoshan,Liu, Da'an,Yao, Wei,et al. Investigation of the anisotropy of black shale in dynamic tensile strength[J]. ARABIAN JOURNAL OF GEOSCIENCES,2018,11(2).
APA	Shi, Xiaoshan.,Liu, Da'an.,Yao, Wei.,Shi, Yirui.,Tang, Tiewu.,...&Han, Weige.(2018).Investigation of the anisotropy of black shale in dynamic tensile strength.ARABIAN JOURNAL OF GEOSCIENCES,11(2).
MLA	Shi, Xiaoshan,et al."Investigation of the anisotropy of black shale in dynamic tensile strength".ARABIAN JOURNAL OF GEOSCIENCES 11.2(2018).