DOI: 10.1002/2016GL069951
论文题名: Strengthening mechanism of cemented hydrate-bearing sand at microscales
作者: Yoneda J. ; Jin Y. ; Katagiri J. ; Tenma N.
刊名: Geophysical Research Letters
ISSN: 0094-8891
EISSN: 1944-8622
出版年: 2016
卷: 43, 期: 14 起始页码: 7442
结束页码: 7450
语种: 英语
英文关键词: hydrate
; micro-X-ray CT
; shear
; strength
; triaxial test
Scopus关键词: Bearings (machine parts)
; Computerized tomography
; Deformation
; Hydrates
; Hydration
; Image processing
; Low temperature testing
; Sediments
; Shearing
; Stress-strain curves
; Temperature
; Hydrate bearing sediments
; Localized deformations
; Micro X-ray CT
; Microfocus X-ray computed tomography
; Particle deformation
; Strength
; Strengthening mechanisms
; Stress-strain relationships
; Gas hydrates
英文摘要: On the basis of hypothetical particle-level mechanisms, several constitutive models of hydrate-bearing sediments have been proposed previously for gas production. However, to the best of our knowledge, the microstructural large-strain behaviors of hydrate-bearing sediments have not been reported to date because of the experimental challenges posed by the high-pressure and low-temperature testing conditions. Herein, a novel microtriaxial testing apparatus was developed, and the mechanical large-strain behavior of hydrate-bearing sediments with various hydrate saturation values (Sh = 0%, 39%, and 62%) was analyzed using microfocus X-ray computed tomography. Patchy hydrates were observed in the sediments at Sh = 39%. The obtained stress-strain relationships indicated strengthening with increasing hydrate saturation and a brittle failure mode of the hydrate-bearing sand. Localized deformations were quantified via image processing at the submillimeter and micrometer scale. Shear planes and particle deformation and/or rotation were detected, and the shear band thickness decreased with increasing hydrate saturation. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978536239&doi=10.1002%2f2016GL069951&partnerID=40&md5=3a12509a90e2d6b95c637f17ebce0d06
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9854
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Methane Hydrate Geo-mechanics Research Group, Research Institute of Energy Frontier, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Recommended Citation:
Yoneda J.,Jin Y.,Katagiri J.,et al. Strengthening mechanism of cemented hydrate-bearing sand at microscales[J]. Geophysical Research Letters,2016-01-01,43(14).