Analysis the Influence of Projectile Penetration Velocity and Length - Diameter Ratio on Fuze Overload Signal Adhesion

The overload signal of fuze is prone to be adhesion while projectile penetrating multi-layer target with high speed. This problem would cause failure of judgment the layers. The ahhesion phenomenon is related to many factors, such as the penetration speed, parameters of the projectile, the characteris of target and so on. In this paper, the influence of penetration speed and projectile length-diameter ratio on the overlaod signal adhesion is analyzed by numerical simulation. Firstly, the reliability of the material model and its material parameters are verified by simulating the penetration experiments of reduced-scale projectiles. Then three projectile models with different length-diameter ratios are established to compare and analyze the adhesion of overload signals penetrating the five-layer concrete target. The analysis shows that the signal is easy to be adhesion with the increasing of penetrating speed and the length-diameter ratio. However, with the increase of the penetrating speed of the projectile, the influence of its length-diameter ratio on the adhesion gradually decreases.