Damage To The Concrete Research Projectile Penetration

Shaped charge and kinetic-energy penetrator construct of two tandem warhead, which is one of the development trends of earth-penetrating weapons. Its theory is that the shaped charge of pre-part on the target to open crater and after-part enter the projectiles by kinetic energy break through compartment into the target to explode so that it can reach the purpose of damage the target effectively. After the concrete suffered the effect of the high-speed projectiles and pre-shaped charge, the process of the after-part enter the kinetic-energy penetration can be summarized to a penetrative process of the pre-damaged concrete, which is the topic of this research.This paper first introduces the structure characteristics of the concrete, the characteristics of force and damaged model. Then Using the basis of stress wave propagation, elastoplastic mechanics, the cavity expansion and other theories to analyze the damage mechanism of the two tandem warhead to concrete’s cutting-up and pre-damaged concrete. On all of this, it established a pre-damage concrete model, researched pre-damaged concrete’s hole-shaped geometric parameters and the effects of the assumption of the damaged zone weakening. Further more, it takes the calculation, experimental verification and numerical simulation. The results showed that:the assumption of the linear weakening is in keeping with the fact. The calculate result of this research is in keeping with the date of Mostert and Folsom. And the accuracy is higher than the existing Murphy’s engineering model and Teland model. The result of using ANSYS/LS-DYNA to conduct a numerical simulation for pre-damaged concrete penetrate process is very close to experimental values.