Abstract

This paper presents a thermo-hydro-mechanical coupling peridynamic (PD) model to simulate the deformation and failure of rock materials and the diffusion of the flow and temperature subjected to the coupling effect of multi-physical fields. By using the peridynamic least squares minimization (PD LSM) method, the thermal conduction and the flow diffusion equation in the coupling of thermo-mechanical, hydro-mechanical, and thermo-hydro-mechanical are refined in the PD form. The equation of motion for thermo-hydro-mechanical coupling is built in the framework of the bond-based PD model. The verification of the coupling PD model is demonstrated by comparison against the analytical solutions and previous numerical results in the problems of steady thermal conduction, thermal deformation, transient flow, hydraulic fracturing, thermal consolidation, and hydraulic fracturing considering the heat effect. The comparison results show that the proposed thermo-hydro-mechanical coupling PD model can capture the deformation and failure of rock materials under the coupling effect of multi-physical fields.

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