Many geological materials, such as shale, mudstone, carbonate rock, limestone and rock
salt are multi-porosity porous media in which pores of different scales may co-exist in the …

Cracking of rocks and rock-like materials exhibits a rich variety of patterns where tensile
(mode I) and shear (mode II) fractures are often interwoven. These mixed-mode fractures are …

The failure behavior of geological materials depends heavily on confining pressure and
strain rate. Under a relatively low confining pressure, these materials tend to fail by brittle …

We investigate three aspects of material behavior in this ninth installment of the Cam-Clay
series, namely, anisotropy, heterogeneity, and viscoplasticity. The main focus of the paper is …

We present a continuum framework for coupled solid deformation–fluid flow in anisotropic
elastoplastic porous media. A thermodynamic formulation of the coupled processes gives …

Closed-form expressions for poroelastic coefficients are derived for anisotropic materials
exhibiting single and double porosity. A novel feature of the formulation is the use of the …

Geologic shear fractures such as faults and slip surfaces involve marked friction along the
discontinuities as they are subjected to significant confining pressures. This friction plays a …

Self-consistent extension of linear poroelasticity to overlapping scales of porosity within fluid-
saturated anisotropic materials is developed. The coefficient matrix of poromechanical …

The failure behavior of field-scale rock masses has long been studied indirectly through
laboratory compression tests on rock specimens with preexisting flaws. However, little to no …

A stabilized thermo-hydro-mechanical (THM) finite element model is introduced to
investigate the freeze–thaw action of frozen porous media in the finite deformation range. By …