IGGCAS OpenIR  > 页岩气与地质工程院重点实验室
Factors Controlling the Difference in Brazilian and Direct Tensile Strengths of the Lac du Bonnet Granite
Qi, Shengwen1,2,3,4; Lan, Hengxing4,5; Martin, Derek4; Huang, Xiaolin1,2,3
2020-03-01
Source PublicationROCK MECHANICS AND ROCK ENGINEERING
ISSN0723-2632
Volume53Issue:3Pages:1005-1019
AbstractLaboratory tests showed that the average direct tension strength (DTS0) of the Lac du Bonnet granite was 6.9 MPa, and significantly less than its average Brazilian tension strength (BTS0), i.e., 8.8 MPa. In this paper, a grain-based model (GBM) with a 2D universal discrete element code (UDEC) was used to explore factors that could control the difference in the direct tension strength (DTS) and Brazilian tension strength (BTS) of the Lac du Bonnet granite from the micromechanical point of view. Micro parameters of the grain contacts were investigated, i.e., the tensile strength (T), cohesion (c), friction angle (phi), and the ratio of the shear to normal stiffness (lambda). Results show that both BTS and DTS highly depended on log(lambda). With an increase in log(lambda), the BTS first increased nonlinearly and decreased instead after achieving a peak while the DTS always increased nonlinearly. The BTS was sensitive to T and c, while the DTS was mainly sensitive to T. The ratio of DTS to BTS first decreased with the increase of log(lambda) and then increased instead from a minimum. It was found that the GBM with UDEC can well reproduce the uniaxial compression, direct tension and Brazilian tests of the Lac du Bonnet granite simultaneously only on condition that lambda = 2.51. This indicated that the shear stiffness of the grain boundary in the Lac du Bonnet granite may be several times larger than its normal stiffness. This may be the main factor controlling the difference in the BTS and DTS of the Lac du Bonnet granite.
KeywordBrazilian tension strength Direct tension strength Grain-based model UDEC Ratio of the shear to normal stiffness Lac du Bonnet granite
DOI10.1007/s00603-019-01946-x
WOS KeywordPARTICLE MODEL ; ROCK-MECHANICS ; FAILURE ; MICROSTRUCTURE ; COMPRESSION ; FRACTURE ; TESTS
Language英语
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000522733700003
PublisherSPRINGER WIEN
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95518
Collection页岩气与地质工程院重点实验室
Corresponding AuthorQi, Shengwen
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB, Canada
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qi, Shengwen,Lan, Hengxing,Martin, Derek,et al. Factors Controlling the Difference in Brazilian and Direct Tensile Strengths of the Lac du Bonnet Granite[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020,53(3):1005-1019.
APA Qi, Shengwen,Lan, Hengxing,Martin, Derek,&Huang, Xiaolin.(2020).Factors Controlling the Difference in Brazilian and Direct Tensile Strengths of the Lac du Bonnet Granite.ROCK MECHANICS AND ROCK ENGINEERING,53(3),1005-1019.
MLA Qi, Shengwen,et al."Factors Controlling the Difference in Brazilian and Direct Tensile Strengths of the Lac du Bonnet Granite".ROCK MECHANICS AND ROCK ENGINEERING 53.3(2020):1005-1019.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qi, Shengwen]'s Articles
[Lan, Hengxing]'s Articles
[Martin, Derek]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qi, Shengwen]'s Articles
[Lan, Hengxing]'s Articles
[Martin, Derek]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qi, Shengwen]'s Articles
[Lan, Hengxing]'s Articles
[Martin, Derek]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.