Quasiconvex relaxation of isotropic functions in incompressible planar hyperelasticity

Robert J. Martin, Jendrik Voss, Ionel-Dumitrel Ghiba +1

In this note, we provide an explicit formula for computing the quasiconvex envelope of any real-valued function $W:\mathrm{SL}(2)\to \mathbb{R}$ with $W(RF)=W(FR)=W(F)$ f…