HIA model: Hybrid Integral Approach model.

HIA is based on the molecular 8-chain density proposed by Arruda & Boyce, a logarithmic function proposed by Gent & Thomas and an integral energy density introduced by the Authors.

The model contains six rheological parameters.

A total Lagrangian formulation is used to describe the geometrical and material non-linearity and a finite element implementation is developed in the FER software.

Four examples, including homogeneous and non-homogeneous deformations are proposed to show the applicability of the HIA numerical model.HIA model: Hybrid Integral Approach model.