Shen. DEM simulation of grain coating type methane hydrate bearing sediments along various stress paths. Engineering Geology, 20

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Pie · Answer 1 · 2024-03-22T20:16:23+03:00

Grain coating type methane hydrate-bearing sediments along various stress paths is a thesis based on the grain coating.

<h3>What are methane hydrate-bearing sediments?</h3>

The discrete element method (DEM) is used in this study to examine the mechanical characteristics of grain-coating type methane hydrate-bearing sediments (MHBS) under four common compression conditions: triaxial, isotropic, and constant stress ratio, and genuine triaxial.
The DEM contact model takes into account the grain-coating type MHBS particle-scale process. According to the numerical findings, MH saturation and bonding lead to an increase in structural yield stress.
In the compression experiments with a constant stress ratio, the mean stress and volumetric change are greater under lower stress ratios.
The real triaxial compression test's yield envelope and the Lade-Duncan criterion are in good agreement. By altering the size of the Lade-Duncan yield surface, the shear strain contours in the deviatoric plane can be defined.

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