Study on critical bounce and damage of tungsten alloy spherical fragments penetrating cylindrical concrete

Abstract Prefabricated fragment bomb will produce a large number of tungsten alloy spherical damage elements, causing damage to a wide range of targets. The phenomenon of bouncing projectile will deviate from the trajectory of fragments and affect the damage field of explosive projectile. In order to accurately obtain the influence of bouncing projectile on the residual damage of tungsten ball fragments, the damage of concrete targets caused by bouncing projectile is analyzed. The oblique penetration of tungsten ball fragments into concrete at different angles and speeds is simulated. Through the angle-by-angle approximation of cylinders and planes with different curvature radii at 1000m/s, the critical bounce angles in each case are obtained. Based on this, the critical bounce angle of each cylinder under medium and high speed conditions is obtained. The simulation results show that the critical bounce angle decreases with the increase of curvature, and the critical angle increases with the increase of velocity. The residual velocity angle of the projectile increases with the increase of curvature. The relationship between concrete damage degree and curvature and velocity is obtained. Based on the critical angle of penetration of concrete with different fragment flight parameters, the killing range of fragments can be corrected, and the accurate evaluation of the killing ability under the condition of bouncing projectile can be realized.