Homogenisation of elasto-plastic evolutions driven by the flow of dislocations

Abstract

This work establishes the existence of rate-independent elastoplastic evolutions driven by dislocation fields in single crystals via a homogenisation procedure. We use the theory of space-time currents to place the Small-Distortion Geometric Model of [arXiv:2609.23728] on a rigorous footing and conduct the homogenisation by using recently developed normal-to-integral strict approximation results for space-time currents which respect the inherent space-time structure. We prove both a homogenisation and recovery result and thus demonstrate that the field version of the Small-Distortion Geometric Model is well-justified from microscopic principles.

arXiv comment56 pages