Special Session 51: Phase field models and real world applications

Phase-field approaches in elastic inverse problems

Andrea Aspri
University of Milan
Italy
Co-Author(s):    Elena Beretta, Cecilia Cavaterra, Elisabetta Rocca, Marco Verani
Abstract:
In this talk I will present some recent results on elastic inverse problems related to the shape reconstruction of cavities and inclusions in a bounded linear isotropic medium by means of boundary measurements. We adopt the point of view of the optimal control, that is we rephrase the inverse problems as a minimization procedure where the goal is to minimize, in the class of Lipschitz domains, a misfit boundary functional or an energy-type functional with the addition of a regularization term which penalizes the perimeter of the cavity/inclusion to be reconstructed. The optimization problem is addressed by a phase-field approach, approximating the perimeter functional with a Modica-Mortola relaxation. This is a joint work with E. Beretta, C. Cavaterra, E. Rocca and M. Verani.