A generalized interpolation material point method for modelling coupled thermo-hydro-mechanical problems
Journal article, 2021
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.
Thermal effects
Slope failure
Material point method
Unsaturated porous media
Thermo-hydro-mechanical
Author
Xiaoqin Lei
Chengdu University of Technology
CAS Center for Excellence & Innovation in Tibetan Plateau Earth System Sciences
Chinese Academy of Sciences
Siming He
Chinese Academy of Sciences
CAS Center for Excellence & Innovation in Tibetan Plateau Earth System Sciences
Ayman Abed
Chalmers, Architecture and Civil Engineering, Geology and Geotechnics
Xiaoqing Chen
CAS Center for Excellence & Innovation in Tibetan Plateau Earth System Sciences
Chinese Academy of Sciences
Zongji Yang
Chinese Academy of Sciences
Yong Wu
Chinese Academy of Sciences
Computer Methods in Applied Mechanics and Engineering
0045-7825 (ISSN)
Vol. 386 114080Subject Categories
Geophysical Engineering
Applied Mechanics
Computational Mathematics
DOI
10.1016/j.cma.2021.114080