1. Introduction

Here we describe the implementation of Maxwell’s viscoelasticity model (keyword VISC_MAXWELL). A variant of this model has been added for poromechanics (keyword VISC_MAXWELL_MT) which predicts the evolution of parameters with porosity according to a Mori-Tanaka homogenization model. This law was first developed and used as part of G. Mélot’s thesis [1] on bituminous materials.

For each of these models, it is assumed that the material is isotropic. They can be used in 3D, in plane deformations (D_ PLAN) and in axisymmetry (AXIS).

In this note, the equations constituting the models and their implementation are presented.