Based on the similarity of stress-strain relationship between the static and the dynamic experi- ments, dynamic constitutive equation of concrete is putted forward in this paper extended from Mazars static damage model. In terms of the relationship between damage and…
Based on the similarity of stress-strain relationship between the static and the dynamic experi- ments, dynamic constitutive equation of concrete is putted forward in this paper extended from Mazars static damage model. In terms of the relationship between damage and strain field, dynamic damage is introduced into the analysis of stress/strain field near the crack tip of Mode I crack. And the dynamic damage factor of concrete is derived from dynamic fracture mechanics coupled with damage mechanics. The coupling analysis of fracture and damage supplies a theoretical basis for the dynamic failure mechanism of concrete. Iteration method is adopted to decouple the equation and compute the dynamic and static damage factors of concrete. The theoretical results are in a good agreement with the experiments, which indicates that the analysis of damage-fracture coupling for concrete material is valid.