A new material model for SFRC under high dynamic loadings

This paper presents a new appropriate material model for steel flbre reinforced concrete (SFRC) concerning constitutive equations for the high dynamic regime. Herein, the most essential ma- terial properties of SFRC are brie∞y resumed. Their mathematical relations, which are deduced from experiments carried out separately like compressive strength or strain{rate dependency, are modular for- mulated in an elastic{plastic continuum damage theory. Due to the classical theory of thermodynamics, the Cauchy{stress tensor was additive disparted into a hydrostatic pressure component and a deviatoric stress component. In doing so, the material dependent constitutive equations are splitted in (1) an equa- tion of state in a pressure{volume{energy relation and (2) a plastic yield condition including isotropic shifting due to strain{rate efiects and macroscopic damage (degradation of stifiness and strength). The new SFRC model is prepared for hydrocode simulations. The numerical results of flbre reinforced concrete plates exposed to contact explosives are evaluated and compared qualitatively as well as quantitatively with full-scale tests obtained at the WTD 52 1 .