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A generalized interpolation material point method for modelling coupled thermo-hydro-mechanical problems

2021; Elsevier BV; Volume: 386; Linguagem: Inglês

10.1016/j.cma.2021.114080

1879-2138

X. L. Lei, Siming He, Ayman A. Abed, Xiaoqing Chen, Zongji Yang, Yong Wu,

Dam Engineering and Safety

This paper proposes a Generalized Interpolation Material Point Method (GIMP) for modelling coupled thermo-hydro-mechanical (THM) processes within unsaturated porous media. The governing equations for the coupled thermo-hydro-mechanical problems are derived based on the conservation laws of mass, momentum and energy, and are discretized within the framework of the explicit three-phase single-point GIMP. The proposed THM-coupled GIMP is validated against available analytical solutions and FEM-based numerical solutions, and is used for simulating a climate-driven slope failure process involving both temperature variation and rainfall infiltration. The proposed THM-coupled GIMP is proved to be capable to capture the fully coupled thermo-hydro-mechanical process within unsaturated porous media associated with large deformations.