Concrete Penetration by Eroding Projectiles: Experiments and Analysis

摘要

Spherical-nose copper and tantalum rods with aspect ratios between 4.0 and 14.6were gun launched against 91-cm dia and 91-cm long concrete and simulant reinforced concrete targets with velocities ranging from 0.15 cmlps to 0.19 cm1%s. Targets were instrumented with a sequence of break gages which provided valuable data for characterizing the penetration process. Target hole profiles and projectile residual masses were measured and reported. Analysis of the penetration performance of projectiles was performed within the framework of the modified hydrodynamic theory of penetration. Based on the results of these calculations, the penetration efficiencies of the copper and the tantalum projectiles are compared as functions of impact velocities. Analysis of the penetration resistance of the simulant reinforced concrete targets was based on treating the targets as composites, comprised of layers of concrete proper and reinforcing steel; the results of these calculations are compared with the experimental data. Using this theory, the penetration resistance of a concrete/steel/concrete composite is investigated as a function of the following parameters: thickness of the surface layer of the concrete, thickness of the steel reinforcement, and impact velocity.