Evaluation of semi-analytical model for rigid projectile penetration into concrete/metal targets

摘要

The main objective of this research is to evaluate a proposed semi-analytical model for penetration process of rigid projectile in concrete and concrete/metal targets using experimental and numerical methods. In theoretical analysis of this study, the dynamics cavity expansion theory and the wave reflection time in the form of tensile in concrete slab are used. The effect of the friction coefficient is also investigated during the penetration process. The equations are then generalized for two-layered targets made out of concrete and steel. A series of penetration tests and numerical simulations in LS-DYNA software are conducted to evaluate the proposed model. The main obtained parameters are residual velocity, penetration depth, and ballistic limit velocity. The analytical results are compared with experimental and numerical data. These results are in agreement with each other.