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Modelling of topological derivatives for contact problems

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Abstract

The problem of topology optimization is considered for free boundary problems of thin obstacle types. The formulae for the first term of asymptotics for energy functionals are derived. The precision of obtained terms is verified numerically. The topological differentiability of solutions to variational inequalities is established. In particular, the so-called outer asymptotic expansion for solutions of contact problems in elasticity with respect to singular perturbation of geometrical domain depending on small parameter are derived by an application of nonsmooth analysis. Such results lead to the topological derivatives of shape functionals for contact problems. The topological derivatives are used in numerical methods of simultaneous shape and topology optimization.

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Correspondence to J. Sokołowski.

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Partially supported by the grant 4 T11A 01524 of the State Committee for the Scientific Research of the Republic of Poland

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Sokołowski, J., Żochowski, A. Modelling of topological derivatives for contact problems. Numer. Math. 102, 145–179 (2005). https://doi.org/10.1007/s00211-005-0635-0

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