Partial three dimensional deformations for the perfectly elastic Mooney material

Summary The governing equations for finite elastic deformations are highly nonlinear and there is still only a limited number of known exact solutions. In general for large elastic fully three dimensional deformations of the isotropic incompressible perfectly elastic neo-Hookean and Mooney materials, a non-trivial deformation for say the neo-Hookean strain-energy function, is frequently not well-defined for the general Mooney strain-energy function because the additional coupling imposes extra constraints on the deformation which are generally inconsistent with one another. Here we note two fully three dimensional deformations for which this is not the case. In both cases the resulting coupled systems of ordinary differential equations need to be integrated numerically but the deformations are nevertheless well-defined for the general Mooney material. The first deformation is simply noted because the details are given elsewhere. For the second deformation, the coupled system is derived and some new simple special solutions are given. Such deformations are important and noteworthy because of the scarcity of exact solutions in finite elasticity.