From an adhesive to a brittle delamination model in thermo-visco-elasticity

Rossi, Riccarda; Thomas, Marita

ESAIM: Control, Optimisation and Calculus of Variations, Tome 21 (2015) no. 1, pp. 1-59.

We address the analysis of a model for brittle delamination of two visco-elastic bodies, bonded along a prescribed surface. The model also encompasses thermal effects in the bulk. The related PDE system for the displacements, the absolute temperature, and the delamination variable has a highly nonlinear character. On the contact surface, it features frictionless Signorini conditions and a nonconvex, brittle constraint acting as a transmission condition for the displacements. We prove the existence of (weak/energetic) solutions to the associated Cauchy problem, by approximating it in two steps with suitably regularized problems. We perform the two consecutive passages to the limit via refined variational convergence techniques.

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