Multiscale Modeling and Simulation of Crystal Plasticity Based on Dislocation Patterning in Polycrystal
A multiscale model on dislocation patterning of cell structure and subgrain for polycrystal is newly developed on the basis of reaction-diffusion theory. A FD simulation for dislocation patterning and a FE one for crystal deformation are simultaneously carried out for a FCC polycrystal at large strain. Reflecting stress value on stress-effect coefficients, it is numerically predicted that the evolution of dislocation pattern in a polycrystal is different in response to the stress condition of each grain.
N. Ohno and T. Uehara
N. Yamaki et al., "Multiscale Modeling and Simulation of Crystal Plasticity Based on Dislocation Patterning in Polycrystal", Key Engineering Materials, Vols. 340-341, pp. 205-210, 2007