2014
DOI: 10.1021/je500638c
|View full text |Cite
|
Sign up to set email alerts
|

Failure Mechanisms in Cemented Hydrate-Bearing Sands

Abstract: A significant portion of our knowledge on gas hydrate-bearing sands comes from experimental results on laboratory-synthesized specimens. The failure mechanics are often interpreted using components of the stress–strain curves, which capture the specimen’s global (large-scale) response to shear. In this paper, we postulate on the microscale mechanics, which lead to a variety of interesting global behaviors. Two mechanisms of failure during shear are postulated: one involves debonding of the hydrate particle fro… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

1
22
0

Year Published

2015
2015
2022
2022

Publication Types

Select...
7
1

Relationship

0
8

Authors

Journals

citations
Cited by 49 publications
(23 citation statements)
references
References 28 publications
1
22
0
Order By: Relevance
“…In earlier studies, it was impossible to observe the morphological changes in hydrate cementation directly during the shear process because of apparatus limitations, and several hypothetical particle‐level mechanisms were proposed. A shear plane was considered to develop through the hydrate‐cemented clusters when the hydrate strength is lower than the hydrate‐sand bonding strength, and the hydrates would detach from the sand particles, while some hydrate breakage occurs during shearing (Gabitto & Tsouris, ; Pinkert & Grozic, ; Waite et al, ; Yun et al, , ). Because this process will lead to a more remarkable rearrangement of the sand particles, such as sliding, rotating, and overturning, and these processes will consume much energy, the increase rate of the deviator stress with axial strain ε a would decrease significantly.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…In earlier studies, it was impossible to observe the morphological changes in hydrate cementation directly during the shear process because of apparatus limitations, and several hypothetical particle‐level mechanisms were proposed. A shear plane was considered to develop through the hydrate‐cemented clusters when the hydrate strength is lower than the hydrate‐sand bonding strength, and the hydrates would detach from the sand particles, while some hydrate breakage occurs during shearing (Gabitto & Tsouris, ; Pinkert & Grozic, ; Waite et al, ; Yun et al, , ). Because this process will lead to a more remarkable rearrangement of the sand particles, such as sliding, rotating, and overturning, and these processes will consume much energy, the increase rate of the deviator stress with axial strain ε a would decrease significantly.…”
Section: Resultsmentioning
confidence: 99%
“…These studies have increased our understanding of the stability of gas hydrate‐bearing layers over the past decades. However, the cementation failure behavior of the gas hydrate‐bearing sediment is still unclear, and most of the studies have been hypothetical (Kajiyama et al, ; Pinkert & Grozic, ; Yun et al, , ). Only a few studies were conducted on the changes in hydrate cementation (morphology) and localized shear deformation of gas hydrate‐bearing sediments during shear due to the experimental apparatus limitations.…”
Section: Introductionmentioning
confidence: 99%
“…Conversely, failure occurs along the hydrate particle interface when the hydrate strength is greater than the hydrate grain bonding strength. Pinkert and Grozic [] extended this possible failure mechanism to cemented hydrate‐bearing sands. In the fixed failure mechanism, the hydrate is debonded from the sand grains and then some hydrate breakage occurs during shearing.…”
Section: Resultsmentioning
confidence: 99%
“…Shearing of particulate materials like sands requires the soil particles to rearrange, through rolling and sliding, which requires more work under increasing confining stresses (Figure 1b). The addition of hydrate, which forms an interconnected network throughout the pore space (Chaouachi et al, 2015;Yang et al, 2016), will provide an additional constraint that has to be broken, crushed, or overridden to allow dilation (Pinkert & Grozic, 2014), therefore, giving rise to a cohesive (cementing) behavior. Natural HBS samples are subject to sample disturbance due to the imposed stress changes during coring, recovery, and transfer (Dai & Santamarina, 2014) that can weaken the sediment.…”
Section: Mohr-coulomb Strength Modelmentioning
confidence: 99%