Induced anisotropy and anelastic strains of concrete are modeled within the general framework of the anisotropic damage mechanics. For this purpose, anisotropic criteria are developed and allow to govern crack growth in both direct and induced tension. In the case…
Induced anisotropy and anelastic strains of concrete are modeled within the general framework of the anisotropic damage mechanics. For this purpose, anisotropic criteria are developed and allow to govern crack growth in both direct and induced tension. In the case of induced tension, an original criterion traduces the effects of microscopic self-stresses generated at the aggregate-paste interfaces. The control of damage state is ensured by two 2nd order tensors, for direct and induced cracks. Damages are deduced from the cracking state by the theory of the weakest link, generalized to the non-radial loading cases by an original method inspired from the Weibull theory. This method allows to couple several non-coaxial cracking states. Although only cracks due to mechanical loading are taken into account in this study, the method can be easily extended to other kinds of degradation. To assess the relevance of the model, several numerical simulations are performed and analysed.