Calculus of Variations and Geometric Measure Theory
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P. van Meurs - A. Muntean - M. A. Peletier

Upscaling of dislocation walls in finite domains

created by vanmeurs on 08 Sep 2018



Inserted: 8 sep 2018

Year: 2013

ArXiv: 1308.5071 PDF


We wish to understand the macroscopic plastic behaviour of metals by upscaling the micro-mechanics of dislocations. We consider a highly simplified dislocation network, which allows our microscopic model to be a one dimensional particle system, in which the interactions between the particles (dislocation walls) are singular and non-local. As a first step towards treating realistic geometries, we focus on finite-size effects rather than considering an infinite domain as typically discussed in the literature. We derive effective equations for the dislocation density by means of \Gamma-convergence on the space of probability measures. Our analysis yields a classification of macroscopic models, in which the size of the domain plays a key role.

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