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Influence of a boundary perforation on the Dirichlet energy

Dambrine M., Vial G.

Control and Cybernetics

2005

Vol. 34, no 1

117-136

We consider some singular perturbations of the boundary of a smooth domain. Such domain variations are not differentiable within the classical theory of shape calculus. We mimic the topological asymptotic and we derive an asymptotic expansion of the shape function in terms of a size parameter. The two-dimensional case of the Dirichlet energy is treated in detail. We give a full theoretical proof as well as a numerical confirmation of the results.