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Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale
Joint Authors
Guo, Yintong
Yang, Chunhe
Wang, Lei
Xu, Feng
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-20
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
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.
American Psychological Association (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،Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1116827
Modern Language Association (MLA)
Guo, Yintong…[et al.]. Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale. Advances in Civil Engineering No. 2018 (2018), pp.1-9.
https://search.emarefa.net/detail/BIM-1116827
American Medical Association (AMA)
Guo, Yintong& Yang, Chunhe& Wang, Lei& Xu, Feng. Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-9.
https://search.emarefa.net/detail/BIM-1116827
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1116827