  The thermo-hydro-mechanical of unsaturated soils plays a significant role in
dynamic shear banding and fracturing. In this article, we propose a
thermo-hydro-mechanical material model in the periporomechanics paradigm to
model shear banding and crack triggered by temperature. Periporomechanics is a
nonlocal framework for the mechanics of unsaturated soil where a length scale
dictates the nonlocal interaction between material points. Periporomechanics
unites continuous and discontinuous deformation and fluid flow in porous media.
As a new contribution, we incorporate the thermo-hydro-mechanical material
model in the periporomechanics through the correspondence principle for
modeling shear banding and cracking in unsaturated porous media. The stabilized
PPM correspondence principle that mitigates the multiphase zero-energy mode
instability is augmented. At the global level, we have numerically implemented
the periporomechanics paradigm through an explicit Lagrangian meshfree
algorithm in the global level. At the local level, we impose the return mapping
algorithm to implement the thermo-hydro-mechanical constitutive model. We
present numerical examples to demonstrate the efficacy and robustness of
proposed periporomechanics for modeling the shear banding bifurcation and crack
in unsaturated porous media triggered by temperature.
