Residual Deformation from Lattice Defects

Abstract

An element of crystalline material through which a net flux of dislocations has passed exhibits plastic shape change. Dislocation lines within the element, i.e., displacement discontinuities across the slip plane in the context of Volterra defects may also contribute to this plastic deformation. However, plastic deformation, according to traditional definitions, does not address additional changes in dimensions of the body resulting from residual elastic deformation associated with local stress fields induced by defects. Mura (1982) labels these local, self-equilibrated stresses (i.e., residual stresses) eigenstresses.