Abstract: The important parameters for the concrete composite target to simulate the monolithic target include the number of matrix layers and thicknesses of adhesive layers of the concrete composite target. The influence of the two parameters on the penetration deceleration is studied by using AUTODYN2D hydrocode. The calibration and validation for the initial simulation model and material parameters are done through a comparison of numerical simulation results with the experimental results and the analytical model in literature. Multi-group simulation models of the concrete composite targets subjected to projectile impact are configured based on the number of matrix layers and thicknesses of adhesive layers of composite targets. The results of penetration velocity and deceleration-time histories show that the composite target can simulate the monolithic target in the deceleration penetration experiments, but the thicknesses of adhesive layers should not be more than half of the projectile nose length, the deviation between them increases as the number of matrix layers of composite target increases when the thicknesses of adhesive layers are more than half of the projectile nose length. The simulation results provide references for the configuration of concrete composite targets in trials.

Key words: concrete, composite target, deceleration, simulation