Phase-field modeling and peridynamics for defect dynamics, and an augmented phase-field model with viscous stresses

Dear colleagues,

We invite you to read our new paper "Phase-field modeling and peridynamics for defect dynamics, and an augmented phase-field model with viscous stresses" which appeared in JMPS. Here we propose an augmented phase-field model to introduce the missing physics in phase-field model which are (1) the absence of higher-order stress to balance unphysical stress singularities, and (2) the ability of the model to access unphysical regions of the energy landscape. The augmented model adds: (1) a viscous stress to the momentum balance, in addition to the dissipative phase-field evolution, to regularize singularities; and (2) an augmented driving force that models the physical mechanism that keeps the system out of unphysical regions of the energy landscape. When coupled to elastodynamics, the augmented model correctly describes both subsonic and supersonic interface motion. (https://doi.org/10.1016/j.jmps.2021.104716)