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Infinite-order laminates in a model in crystal plasticity

  • Nathan Albin (a1), Sergio Conti (a2) and Georg Dolzmann (a3)

Abstract

We consider a geometrically nonlinear model for crystal plasticity in two dimensions, with two active slip systems and rigid elasticity. We prove that the rank-1 convex envelope of the condensed energy density is obtained by infinite-order laminates, and express it explicitly via the 2F1 hypergeometric function. We also determine the polyconvex envelope, leading to upper and lower bounds on the quasiconvex envelope. The two bounds differ by less than 2%.

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Infinite-order laminates in a model in crystal plasticity

  • Nathan Albin (a1), Sergio Conti (a2) and Georg Dolzmann (a3)

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