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Role of bedding plane in the relationship between Mode-I fracture toughness and tensile strength of shale
Shi, Xiaoshan1,2; Zhao, Yixin1,2,3; Danesh, Nima Noraei1; Zhang, Xin4; Tang, Tiewu5
2022-02-01
Source PublicationBULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
ISSN1435-9529
Volume81Issue:2Pages:14
AbstractShale exhibits strong anisotropy due to the sedimentary environment and pre-existing micro-fractures. It is of great significance to characterize the bedding-plane-induced fracture toughness anisotropy in shale and its relationship with other physical and mechanical properties. Samples with different bedding angles (0 degrees, 30 degrees, 45 degrees, 60 degrees, and 90 degrees), defined as the angle between loading axis and bedding plane, are prepared for cracked chevron notched Brazilian disc test and Brazilian disc test. The results indicate that both fracture toughness and tensile strength are positively correlated with the bedding angle. As the bedding angle rises, the elastic modulus and wave speed decrease nonlinearly. With the increase in bedding angle, Poisson's ratio decreases first and then increases. It can be concluded that fracture toughness and mechanical properties of shale reveal the degree of anisotropy induced by bedding structure. In this study, the relationship between these parameters is discussed in detail. Also, an exponential function is proposed to improve the previously developed linear functions by researchers, defining the relationship between fracture toughness and the mechanical properties. In geological-engineering projects, the fracture toughness of shale under different loading directions can be determined from the proposed exponential function and these mechanical properties.
KeywordMode-I fracture toughness Anisotropy Tensile strength Bedding angles Shale
DOI10.1007/s10064-022-02572-8
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province
WOS KeywordSEMICIRCULAR SPECIMENS ; MECHANICAL-PROPERTIES ; SUGGESTED METHOD ; SOFT ROCK
Language英语
Funding ProjectNational Natural Science Foundation of China[51874312] ; National Natural Science Foundation of China[U1910206] ; National Natural Science Foundation of China[51861145403] ; Inner Mongolia Science and Technology Department Project[2019GG140] ; Major scientific and technological innovation project of Shandong Province[2019SDZY01] ; Major scientific and technological innovation project of Shandong Province[2019SDZY02]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Inner Mongolia Science and Technology Department Project ; Inner Mongolia Science and Technology Department Project ; Major scientific and technological innovation project of Shandong Province ; Major scientific and technological innovation project of Shandong Province
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Environmental ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000746585800001
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104000
Collection页岩气与地质工程院重点实验室
Corresponding AuthorZhao, Yixin
Affiliation1.China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China
2.China Univ Min & Technol Beijing, Beijing Key Lab Precise Min Intergrown Energy & R, Beijing 100083, Peoples R China
3.State Key Lab Water Resource Protect & Utilizat C, Beijing 102209, Peoples R China
4.Beijing Mentougou Dist Municipal Commiss Housing, Beijing 102300, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Shi, Xiaoshan,Zhao, Yixin,Danesh, Nima Noraei,et al. Role of bedding plane in the relationship between Mode-I fracture toughness and tensile strength of shale[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2022,81(2):14.
APA Shi, Xiaoshan,Zhao, Yixin,Danesh, Nima Noraei,Zhang, Xin,&Tang, Tiewu.(2022).Role of bedding plane in the relationship between Mode-I fracture toughness and tensile strength of shale.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,81(2),14.
MLA Shi, Xiaoshan,et al."Role of bedding plane in the relationship between Mode-I fracture toughness and tensile strength of shale".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 81.2(2022):14.
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