Dislocation Density Function Dynamics, DDFD, developed by Alfonso Hing-wan Ngan is a highly efficient method for simulating microstructures at the meso-scale. Source code in Matlab for dislocation plasticity simulation is available for request or download.
Professor Alfonso Ngan is a leading authority in the microstructural basis of properties of engineering materials, in particular, crystalline defects and their modeling, and nanomechanics including applications to biological systems.