Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale

doi:10.1155/2018/8985973

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	Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale
	Guo, Yintong; Yang, Chunhe; Wang, Lei; Xu, Feng
刊名	ADVANCES IN CIVIL ENGINEERING
	2018
页码	-
ISSN号	1687-8086
DOI	10.1155/2018/8985973
英文摘要	We investigated the mechanical properties of mature bedding shale under cyclic loading conditions, with an application to the design of hydraulic fracturing in shale gas wells. Laboratory experiments were conducted on shale samples under two principal loading orientations. Testing results showed that accumulated fatigue damage occurs in a three-stage process. Analysis of fatigue damage at different maximum stress levels shows that fatigue life increases as a power-law function with maximum stress decreasing. And the maximum stress significantly affects the fatigue life. Further, the elastic part of shale rock deformation was recovered in the unloading process, whereas the irreversible deformation remained. The irreversible deformation, growth trend, and accumulation of the total fatigue were directly related to the fatigue damage. This process can be divided into 3 stages: an initial damage stage, a constant velocity damage stage, and an accelerated damage stage, which accounted for about one-third of the fatigue damage. Shale rock is a nonhomogeneous material, and the bedding is well developed. Its fatigue life differs greatly in two principal loading orientations, even under the same loading conditions. All of these drawn conclusions are of great importance for design of hydraulic fracturing in shale gas wells.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000428886000001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4192]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Guo, Yintong,Yang, Chunhe,Wang, Lei,et al. Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale[J]. ADVANCES IN CIVIL ENGINEERING,2018:-.
APA	Guo, Yintong,Yang, Chunhe,Wang, Lei,&Xu, Feng.(2018).Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale.ADVANCES IN CIVIL ENGINEERING,-.
MLA	Guo, Yintong,et al."Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale".ADVANCES IN CIVIL ENGINEERING (2018):-.