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The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media
Zeng, XG; Wei YJ(魏宇杰); Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationINTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
2016
Volume96Pages:64-73
ISSN0020-7683
Abstract

Cracks in kerogen-rich shales and other brittle rock-like materials have a tremendous impact on their elastic properties and strength. In this paper, we investigate the effective mechanical properties of shale plates with pre-existing cracks. We employ the extended finite element method (XFEM) to investigate a pre-cracked medium with an elastic, isotropic and brittle shale matrix. We show how the mechanical properties of the orthotropic shale plates are dependent on the crack density and the standard deviation of crack angles. Both the Young's modulus and the Poisson's ratio of the cracked media exhibit a linear dependence on the standard deviation of crack angles, in contrast to the nonlinear dependence of the strength on the angle deviation. Finally, we propose mechanical models to capture the relationship between the mechanical properties and the distribution characteristics of pre-existing cracks in shales. These phenomenological models could be applied to estimate the fracking behavior of shales in engineering practice. (C) 2016 Elsevier Ltd. All rights reserved.

KeywordPre-cracked Media Crack Distribution Extended Finite Element Method (Xfem) Elastic Properties Strength
DOI10.1016/j.ijsolstr.2016.06.022
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000381324700006
WOS KeywordPre-cracked media ; Crack distribution ; Extended finite element method (XFEM) ; Elastic properties ; Strength
WOS Research AreaMechanics
WOS SubjectMechanics
Funding OrganizationThe authors acknowledge support from the National Natural Science Foundation of China (NSFC) (Grant no. 11425211) and MOST 973 of China (Grant no. 2012CB937500).
DepartmentLNM微结构计算力学(筹)
Classification一类/力学重要期刊
RankingTrue
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/59740
Collection非线性力学国家重点实验室
Corresponding AuthorWei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zeng, XG,Wei YJ,Wei, YJ . The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2016,96:64-73.
APA Zeng, XG,Wei YJ,&Wei, YJ .(2016).The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,96,64-73.
MLA Zeng, XG,et al."The influence of crack-orientation distribution on the mechanical properties of pre-cracked brittle media".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 96(2016):64-73.
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