Alina Krasnobrizha

Numerical Simulation of mechanical behavior of woven composite at different strain rate by a collaborative elasto-plastio-damage model with fractionnal derivatives

This paper deals with a collaborative model to represent hysteresis behavior at different strain rates. The model consists of two sub-models. The first one treats the behavior during loading path. The elastic and in-elastic strains are computed as well as the in-ply damages. The strain-rate sensitivity is also taken into account. The second sub-model involves a fractional derivate approach to describe viscoelastic material response during unloading path. The hysteresis loops and strain rate sensitivity are taken into account by fractional con-stitutive law. Fractional model involves a few parameters which are easily identified through an optimization procedure from the experimental data. The model is validated for thermoset and thermoplastic composite materials at different strain rates.