A Two scale $\Gamma$-convergence Approach for Random Non-Convex Homogenization

Leonid Berlyand; Etienne Sandier; Sylvia Serfaty

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arXiv · 1601.04344

A Two scale $\Gamma$-convergence Approach for Random Non-Convex Homogenization

Leonid Berlyand·Etienne Sandier·Sylvia Serfaty

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Abstract

We propose an abstract framework for the homogenization of random functionals which may contain non-convex terms, based on a two-scale $\Gamma$-convergence approach and a definition of Young measures on micropatterns which encodes the profiles of the oscillating functions and of functionals. Our abstract result is a lower bound for such energies in terms of a cell problem (on large expanding cells) and the $\Gamma$-limits of the functionals at the microscale. We show that our method allows to retrieve the results of Dal Maso and Modica in the well-known case of the stochastic homogenization of convex Lagrangians. As an application, we also show how our method allows to stochastically homogenize a variational problem introduced and studied by Alberti and M\"uller, which is a paradigm of a problem where an additional mesoscale arises naturally due to the non-convexity of the singular perturbation (lower order) terms in the functional.

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Leonid Berlyand, Etienne Sandier, Sylvia Serfaty. 2016-01-17. A Two scale $\Gamma$-convergence Approach for Random Non-Convex Homogenization. https://arxiv.org/abs/1601.04344

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