A model was proposed for the anelastic evolution law of a 2-dimensional crystalline defective solid. Upon assuming that the body was composed of triclinic crystals, and that the evolution process did not alter the material’s symmetry group, it was deduced that the evolution was driven by the current state of the density of the defect distribution. It was shown that a linear relationship between the inhomogeneity velocity gradient and the torsion tensor was enough to model phenomena such as defect relaxation and dislocation pile-ups.

A Model of the Evolution of a Two-dimensional Defective Structure. M.Epstein, M.Elżanowski: Journal of Elasticity, 2003, 70[1-3], 255-65