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arXiv · 2102.06641

Crack occurrence in bodies with gradient polyconvex energies

Martin Kružík·Paolo Maria Mariano·Domenico Mucci
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Abstract

Energy minimality selects among possible configurations of a continuous body with and without cracks those compatible with assigned boundary conditions of Dirichlet-type. Crack paths are described in terms of curvature varifolds so that we consider both \textquotedblleft phase" (cracked or non-cracked) and crack orientation. The energy considered is gradient polyconvex: it accounts for relative variations of second-neighbor surfaces and pressure-confinement effects. We prove the existence of minimizers for such an energy. They are pairs of deformations and varifolds. The former ones are taken to be $SBV$ maps satisfying an impenetrability condition. Their jump set is constrained to be in the varifold support.

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Martin Kružík, Paolo Maria Mariano, Domenico Mucci. 2021-02-12. Crack occurrence in bodies with gradient polyconvex energies. https://doi.org/10.1007/s00332-021-09769-3

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