Résumé
The aim of the work is to predict cyclic accommodation of a polyethylene, taking into account strong thermo-mechanical coupling. The challenge is to be able to predict both the long and short time scales respectively associated with the mean strain increase and stress-strain loop itself. Energetic ters must be accurately predicted to be used as inputs in a fatigue life criterion. A previous work had been conducted in an isothermal framework. It is extended here to thermo-mechanics. Tensile and shear tests performed at the LMGC laboratory (Montpellier, France) provided deformation, temperature and heat sources fields that could be compared to a non-linear thermo-viscoelastic model where coupling was introduced via thermo-elasticity (via the volume strain) and viscous dissipation (via the time-temperature superposition principle on viscolelasticity). Shear results are presented here