Hyperelastic bodies under homogeneous Cauchy stress induced by three-dimensional non-homogeneous deformations

Abstract

In isotropic finite elasticity, unlike in linear elastic theory, a homogeneous Cauchy stress may be induced by non-homogeneous strains. To illustrate this, we identify compatible non-homogeneous three-dimensional deformations producing a homogeneous Cauchy stress on a cuboid geometry, and provide an example of an isotropic hyperelastic material that is not rank-one convex, and for which the homogeneous stress and associated non-homogeneous strains are given explicitly on a domain similar to those analysed.