Dynamic response of projectile and charge during penetration into concrete target with high velocity

Abstract

In order to study the dynamic response characteristics of the penetrating warhead under the impact load, experiments of projectile penetration into concrete target were carried out based on the 30mm ballistic gun. Dynamic deformation characteristics of the projectile with different impact velocities were obtained. Penetration resistance model of the projectile penetration into concrete target was modified by taking wake-separation effect and the cratering effect of the projectile obliquely penetrates into the concrete target into account. Deformation process of the projectile during penetration was analyzed by combining the method of projectile-target separation and the modified penetration resistance model. Erosion characteristics of the projectile during penetration process were obtained. The deformation, stress and strain distribution characteristics of the projectile and charge are analyzed. Results show that during the oblique penetration of the projectile into the target, the nose of the projectile is subjected to greater compression pressure under the influence of the compression wave, resulting in significant deformation in the region spanning 0.32 to 0.59 times the length of the projectile from the nose. The projectile is subjected to a coupling effect of compression and tension waves, which results in a significant transverse deformation at the end of the projectile, panning a region of 0.88 to 1.0 times the length of the projectile from the end of the projectile.