Application Analysis On The Penetration Projectile Of Tungsten Alloy

Because of tungsten alloy with high density and high impact toughness and excellent dynamic mechanics properties such as high strength, and tungsten alloy is used in the armor piercing projectile. With the demand of modern war, Requirements of kinetic energy per unit cross-sectional area of the penetrator is more and more high. In order to improve the kinetic energy per unit area in the penetrator, tungsten alloy is applied to the penetrator, so it is necessary to research in the penetration ability and matching problem between tungsten alloy and the other parts of the penetrator.At first, this paper designs two different structures of tungsten alloy penetrator. The two different penetrators` penetration depth, overload and time of penetration process were calculated by the improving Forrestal model. And the projectile in which tungsten alloy was designed was used to penetrate the concrete target. The result of experiment shows that the projectile in which tungsten alloy was designed can meet the penetration under the condition of experiment. The penetration depth which was calculated by the improving Forrestal model agrees well with the penetration depth which was measured by the experiment.Then, The internal and external tungsten alloy structure projectiles were equivalent to the composite board structures. The composite board structures were analyzed by the stress wave theory. The result shows that the stress in the two structure charge was basically same. Then, the axial stress and the shear stress in the two projectiles were analyzed based on the radial function which was provided by the Yinan Wang and the tungsten alloy structure projectiles which were simplified to the step bars. The result shows that the axial stress in the internal tungsten alloy structure projectile is lower than the external tungsten alloy structure projectile.Finally, the internal and the external structure projectiles were used to simulate the penetration of concrete. The penetration depth, acceleration, axial stress and shear stress history curves were provided by the simulations. The stress which was calculated by the theory was compared with the simulation stress, and the result shows that the penetration depth, acceleration, axial stress and shear stress in the internal structure projectile agree well with the theory result. But the penetration depth, acceleration, axial stress and shear stress in the external structure projectile does not agree well with the theory result.