Modeling of concrete behavior under high strain rates with inertially retarded damage

U. Häussler-Combe , M. Kitzig

The paper proposes a novel approach to model the influence of high strain rates on the behavior of quasi-brittle materials like concrete. It is based on gradient continuum damage, where the gradient part is extended with an inertia of damage. This causes a retardation of damage due to the fact that micro-cracks cannot spread out arbitrarily fast. The application is demonstrated with uniaxial tensile wave propagation and for a plane stress case. Increasing strain rates lead to an expansion of the linear stress-strain behavior with stresses exceeding the quasistatic material strength.

Mots clés: Concrete; Strain rate influence; Retarded damage; Gradient damage

U. Häussler-Combe, M. Kitzig. Modeling of concrete behavior under high strain rates with inertially retarded damage. International Journal of Impact Engineering, 2009, 36 (9), pp.1106. ⟨10.1016/j.ijimpeng.2009.02.004⟩. ⟨hal-00594141⟩