Thermomechanics for Geological, Civil Engineering and Geodynamic Applications: Numerical Implementation and Application to the Bentheim Sandstone

Observations of the mechanical behavior porous rocks subject to external loading indicate existence complex dependencies on level confining pressure, fluid pressure and rate deformation. Due heterogeneous nature rocks, their macroscopic response is result underlying microscopic processes which can alter microstructural organization grain–pore network. The impacts multiscale poromechanical geomaterials are relevant for a number applications ranging from civil engineering, reservoir geological geodynamic. use thermodynamic-consistent approaches construct constitutive laws span large range time scales particularly in this context. In two-part contribution, we present extensions thermomechanics theory account poromechanics path- rate-dependent critical state line models cover relevance model geodynamic applications. second paper, extend agreement with poroelasticity considering addition dissipative inelastic processes. We illustrate using experimental data how derived responses triaxial experiments. focus transition dilation compression regime resulting localization styles shear compaction bands.