Plasticity in the vicinity of metal polycrystal grain boundaries using micromorphic continua

This study presents an investigation of dislocation motion near grain boundaries using micromorphic continua. Micromorphic continuum theories are non-classical continuum theories that assign degrees of freedom to material points over and above the displacement degrees of freedom of classical continua. The purpose of introducing these additional degrees of freedom is to allow the theory to capture the effect of deformations of the material that are significant over small length scales. In this study, these additional degrees of freedom are used to model the distortion of the lattice in a metal single crystal (that are important at the length scale of the Burger's vector) and study the effect of such distortions on the motion of dislocations near grain boundaries.