Visco-hyperelastic characterization of polymeric foam materials

This article presents the visco-hyperelastic material modelling approach for open-cell polymer foams. The visco-hyperelastic material models combine the long-term hyperelastic and viscoelastic material models using finite-strain formulation. The long-term behavior is modelled using the Ogden-Hill's compressible hyperelastic model termed as "hyperfoam" in the commercial finite element software ABAQUS. The time-dependent material response is modelled by adopting the finite-strain viscoelastic formalism implemented in ABAQUS. From the visco-hyperelastic material model a closed-form stress solution for uniaxial extension is derived, which provides a more accurate parameter-fitting method to determine the visco-hyperelastic material parameters from the measurement data. (C) 2015 Elsevier Ltd. All rights reserved.