Modelling of damage in composite materials - Viscoelastic effects

This approach is a tridimensional modelling used to study advanced fabric composite materials including damage and viscoelasticity. The model takes into account de features of loading (type and direction), and the strain velocity. An increment procedure on stress and strain permits step hy step computations for any type of loading which is also expressed as increments. Concerning de coupling between damage and viscoelasticity a new description of degradation in composite is proposed The type of loading and the structural anisotropy of the material are also taken into account and we bring in a damage oriented parameter which depends on the strain velocity.