活性弹丸侵彻陶瓷靶板爆裂毁伤行为研究

The blasting damage mechanism of reactive projectile penetrating into a ceramic target is studied through the ballistic impact experiment. The blasting damage behaviors of reactive projectile penetrating into the ceramic target at different impact velocities and the dispersion characteristics of debris cloud are obtained from the experimen. Based on the one-dimensional stress wave theory and the activation hypothesis of reactive material, the impact initiation behavior of reactive projectile is analyzed. Furthermore, a theoretical model describing the blasting damage behavior of reactive projectile penetrating into the ceramic target is developed by combining the Bernoulli formula. The blasting damage behavior of reactive projectile penetrating into the ceramic target at different velocities are discussed based on experiment and theoretical model. The damage pattern of target, the initiation characteristics of projectile and the dispersion characteristics of debris cloud are analyzed. The results show that the deflagration reaction has a significant effect on the blasting damage behavior of the reactive projectile penetrating into the ceramic target. With the increase of impact velocity, the deflagration reaction of reactive projectile gets more intense, therefore enhancing the damage effect on the target and continuously intensifying the damage degree of ceramic target. The damage pattern of ceramic target evolves from the overall cracking to the global cracking around the central invasion hole, and gradually to the blasting fragmentation. As the impact velocity increases, the mass of the ceramic cone formed by the impact increases continuously. The dispersion velocity of ceramic debris increases first and then decreases. The morphological characteristics of debris cloud behind the target shows a trend of changing from the truncated ellipse to the dart-like shape.