Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment

doi:10.3390/jmse9111158

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Experimental Study on the Shear Band of Methane Hydrate-Bearing Sediment
	Lu XB(鲁晓兵)2,3; Zhang XH(张旭辉)2,3; Sun FF(孙芳芳)2,3; Wang SY(王淑云)3; Liu LL(刘乐乐)1; Liu, Changling 1
刊名	JOURNAL OF MARINE SCIENCE AND ENGINEERING
	2021-11-01
卷号	9 期号:11 页码:16
关键词	hydrate-bearing sediment shear band hydrate saturation triaxial compression CT scanning
DOI	10.3390/jmse9111158
通讯作者	Zhang, Xuhui(zhangxuhui@imech.ac.cn)
英文摘要	The 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.
分类号	二类
资助项目	National Natural Science Foundation of China[12072347] ; National Natural Science Foundation of China[11872365] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017027]
WOS关键词	STRAIN LOCALIZATION ; SAND ; STABILITY ; DEFORMATION ; THICKNESS
WOS研究方向	Engineering ; Oceanography
语种	英语
WOS记录号	WOS:000724616600001
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
其他责任者	Zhang, Xuhui
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/88055]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Qingdao Inst Marine Geol, Qingdao 266237, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式 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.