Micro-polar periporomechanics for shear bands and cracks in porous media under dynamic loads
Micro-polar periporomechanics for shear bands and cracks in porous media under dynamic loads
Periporomechanics is a strong nonlocal framework for modeling the mechanics and physics of variably saturated porous media with evolving discontinuities. In this article, as a new contribution we formulate a Cosserat periporomechanics paradigm for modeling dynamic shear banding and crack branching in porous media incorporating a micro-structure based length scale. In this micro-periporomechanics framework, each material point has translational and rotational degrees of freedom following the Cosserat continuum. A stabilized Cosserat constitutive correspondence principle is used to incorporate classical viscous elastic and plastic material models for porous media in the proposed Cosserat periporomechanics. We have numerically implemented the micro-periporomechanics paradigm through an explicit algorithm in time and a Lagrangian meshfree method in space. Numerical examples are presented to demonstrate the efficacy and robustness of the micro-periporomechanics for modeling shear banding and crack branching in single-phase porous media under dynamic loads.
X. Song; Hossein Pashazad
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
2. Finite element, finite difference, discrete element, material point and other methods
https://doi.org/10.53243/NUMGE2023-395
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