Inserted: 29 jul 2016
Last Updated: 12 may 2017
Journal: J. Math. Anal. Appl.
Preprint SISSA 42$/$2016$/$MATE
In this work we consider an optimal design problem for two-component fractured media for which a macroscopic strain is prescribed. Within the framework of structured deformations, we derive an integral representation for the relaxed energy functional. We start from an energy functional accounting for bulk and surface contributions coming from both constituents of the material; the relaxed energy densities, obtained via a blow-up method, are determined by a delicate interplay between the optimization of sharp interfaces and the diffusion of microcracks. This model has the far-reaching perspective to incorporate elements of plasticity in optimal design of composite media.
Keywords: relaxation, optimal design, Structured deformations, Disarrangements, interfacial energy density, bulk energy density