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Shape control of thin rigid inclusions and cracks in elastic bodies

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Abstract

The paper is concerned with a control of thin rigid inclusion and crack shapes in elastic bodies. It is assumed that rigid inclusions are delaminated; thus, cracks are located on the boundary of inclusions as well as outside of inclusions. We provide the problem formulations and analyze the shape sensitivity with respect to geometrical perturbations in the frame of free boundary models. Inequality type boundary conditions are considered at the crack faces to guarantee a mutual non-penetration between crack faces. Inclusion and crack shapes are considered as control functions. The cost functional, which is based on the Griffith rupture criterion, characterizes the energy release rate and provides the shape sensitivity with respect to a change of the geometry of the structure. We prove an existence of optimal shapes in the problems considered.

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  1. Lavrentyev Institute of Hydrodynamics of the Russian Academy of Sciences, pr. Lavrentyeva 15, Novosibirsk, 630090, Russia

    Alexander M. Khludnev

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  1. Alexander M. Khludnev
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Correspondence to Alexander M. Khludnev.

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Khludnev, A.M. Shape control of thin rigid inclusions and cracks in elastic bodies. Arch Appl Mech 83, 1493–1509 (2013). https://doi.org/10.1007/s00419-013-0759-0

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  • DOI: https://doi.org/10.1007/s00419-013-0759-0

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