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Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment
Lu XB(鲁晓兵)1,2; Zhang XH(张旭辉)1,2; Sun FF(孙芳芳)1,2; Wang SY(王淑云)1; Liu LL(刘乐乐)3; Liu, Changling3
Corresponding AuthorZhang, Xuhui(
AbstractThe occurrence of a shear band is often thought as the precursor of failure. To study the initiation of shear banding in gas hydrate-bearing sediments, two groups of triaxial compression tests combined with a CT (computer tomography) scan were conducted by triaxial CT-integrated equipment under two confining pressures and seven hydrate saturations. The macro stress-strain curves and the corresponding CT scanning images of the micro-structure and the distribution of the components were obtained. The geometric parameters of the shear bands were measured based on the CT images at four typical axial strains, respectively. The distribution characteristics of soil particles, water, hydrate and gas were also analyzed. It is shown that the existence of methane hydrate changes the mechanical property of hydrate-bearing sediment from plastic failure to brittle failure when the hydrate saturation is over 13%, which occurs in the range of the tests in this paper. The peak of the deviatoric stress increases with the hydrate saturation. The shear band is in either a single oblique line or inter-cross lines depending on the hydrate saturation, the effective confining pressure and the initial distribution of the gas hydrate. Most of the shear band surfaces are not straight, and the widths of the shear bands are almost non-uniformly distributed.
Keywordhydrate-bearing sediment shear band hydrate saturation triaxial compression CT scanning
Indexed BySCI
WOS IDWOS:000724616600001
WOS Research AreaEngineering ; Oceanography
WOS SubjectEngineering, Marine ; Engineering, Ocean ; Oceanography
Funding ProjectNational Natural Science Foundation of China[12072347] ; National Natural Science Foundation of China[11872365] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017027]
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
ContributorZhang, Xuhui
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
3.Qingdao Inst Marine Geol, Qingdao 266237, Peoples R China
Recommended Citation
GB/T 7714
Lu XB,Zhang XH,Sun FF,et al. Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2021,9(11):16.
APA 鲁晓兵,张旭辉,孙芳芳,王淑云,刘乐乐,&Liu, Changling.(2021).Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment.JOURNAL OF MARINE SCIENCE AND ENGINEERING,9(11),16.
MLA 鲁晓兵,et al."Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment".JOURNAL OF MARINE SCIENCE AND ENGINEERING 9.11(2021):16.
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