As such, we introduce a thermodynamic framework and a corresponding computational implementation that explicitly captures the brine diffusion along the grain boundary and crack at the grain scale. Meanwhile, the anisotropic fracture and healing are captured via a high-order phase field that represents the regularized crack region in which a newly derived non-monotonic driving force is used to capture the fracture and healing due to the solution precipitation. Numerical examples are presented to demonstrate the capacity of the thermodynamic framework to capture the multiphysics material behaviors of rock salt. This paper is Part II of our work on modeling polycrystal salt for nuclear waste disposal.
- S. Na, W.C. Sun, Computational thermomechanics of crystalline rock. Part I: a combined multi-phase-field/crystal plasticity approach for single crystal simulations, Computer Methods in Applied Mechanics and Engineering, 338:657-691, doi:10.1016/j.cma.2017.12.022, 2018. [PDF][Bibtex]
- R. Ma", W.C. Sun, Computational thermomechanics for crystalline rock. Part II: chemo-damage-plasticity and healing in strongly anisotropic polycrystals, Computer Methods in Applied Mechanics and Engineering, accepted, 2020. [manuscript]