SPF-MHBS: a stress partition constitutive framework for methane hydrate-bearing sediments

Wang, Yuxi; Wang, Rui; Yu, Jiake; Yin, Zhen‐Yu; Zhang, Jianmin

doi:10.1007/s11440-022-01621-6

Cited by 6 publications

(3 citation statements)

References 69 publications

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“…Due to the presence of attractive forces, mainly Van der Waals forces, between fine bentonite particles, cohesive forces between slurry particles should also be considered when continuing to explore clogging and migration behavior of slurry particle. [19][20][21] Furthermore, a common thread in these studies is the use of perfect spheres as the shape of the slurry particles, which may not reflect the plate-like structure of bentonite particles observed in electron microscopy. 22 When cohesion is taken into account, the shape of fine particles may have a significant impact on aggregation patterns and the movement of aggregates.…”

Section: Introductionmentioning

confidence: 99%

Hydromechanical analysis of slurry infiltration with coupled CFD–DEM method

Cheng,

Wang,

Wang

et al. 2024

Num Anal Meth Geomechanics

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The tunnel face stability is closely related to the migration behavior and clogging mechanism of the slurry particles in granular soils, which is not yet fully understood. In this study, the coupled computational fluid dynamics–discrete element method (CFD–DEM) is adopted to investigate the infiltration behavior of slurry at the particle scale. The full Johnson–Kendall–Roberts (JKR) contact model describing interparticle behavior that accounts for cohesion present even when particles are microseparated after collisions is adopted for clay‐clay or clay‐sand particles and the Hertz–Mindlin model is used for sand‐sand particles. Through simulations, the mechanism of the slurry particle's blockage is identified as physical, frictional and cohesive modes, and slurry particle migration usually undergoes the process of aggregation‐destruction‐migration‐reassembly. Meanwhile, the influences of pressure, cohesive force, and particle shape on infiltration are also analyzed. The results indicate that high pressure lengthens the infiltration path and increases the infiltration rate. The increase in cohesion enhances the effective clogging of the sand column by the slurry, and particles with smaller sphericity are more likely to clog in the sand column. These findings may enhance our understanding of the slurry infiltration mechanism and its practical application in TBM tunneling.

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Section: Introductionmentioning

confidence: 99%

Hydromechanical analysis of slurry infiltration with coupled CFD–DEM method

Cheng,

Wang,

Wang

et al. 2024

Num Anal Meth Geomechanics

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“…To better understand the mechanical response of hydrate-bearing sands at high confining pressure, some theoretical analysis 34,35 has been developed to satisfy the requirement of rapid development of methane gas hydrate exploitation. Some constitutive models, including elastoplasticity [36][37][38][39] and hypoplasticity, 5,16,17 have been developed to study the effect of hydrate saturation on mechanical responses of different soil, such as MH-bearing sand, 35,[40][41][42][43] MH-bearing silt 34 and CO 2 hydrate-bearing sand. 13,44 These models are capable of predicting mechanical behavior and deformation characteristics of hydrate-bearing sands in the complex environments with different hydrate saturation and confining pressures.…”

Section: Introductionmentioning

confidence: 99%

“…Although the hydrate saturation effect was successfully incorporated into some constitutive models, 35,[40][41][42][43] the unified constitutive model for the coupling effect of hydrate and grain breakage has been not reported. With the framework of classical elastoplasticity, the bottleneck of complicated calibration procedures might be an obstacle to investigate the coupling effect of hydrate and grain breakage.…”

Section: Introductionmentioning

confidence: 99%

A hypoplastic model for hydrate‐bearing sand considering hydrate saturation and grain breakage

Qian,

Wu,

et al. 2023

Num Anal Meth Geomechanics

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We present a hypoplastic model to capture the mechanical responses of hydrate‐bearing sands by incorporating hydrate saturation and grain breakage. In our model, a new degradation scalar is introduced to account for the effects of hydrate bonding evolution on strength. We also adopt the variable critical state line to assess the effects of hydrate saturation and relative breakage ratio at high confining pressure. This model is validated by modeling a series of laboratory tests.

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