ABSTRACT
While there has been some industrial use of this material modeling approach using the OE technique, Hartley (2012), the OE technique is cumbersome to use and makes the FEA models a bit challenging to create, run, and post-process. It would desirable if one could assign all of these modeling attributes to a single element. A previous paper, Hurtado (2013), described a finite-strain constitutive framework, the Parallel Rheological Framework (PRF) that could model hyperelasticity, nonlinear viscoelasticity and plasticity in elastomeric materials. This framework is based on the superposition of finite-strain viscoelastic and elastoplastic networks in parallel. For each network the model assumes a multiplicative split of the deformation gradient, into an elastic component and a viscous or plastic component, depending on whether the network is viscoelastic or elastoplastic.
