Long-rod Projectile Penetration The Characteristics Of The Two Concrete Targets

By utilizing dimension theory, the similarity of empirical formulae is investigated. After the domestic and external experimental data collected and analyzed, the data have been converted to be dimensionless. The dimensionless data compared with the results of empirical formulae, the conclusion is drawn that if the strength of target with non-restraint withstanding compressive stress is high, the experimental data may basically be expressed with Bernard formula and Hao baotian formula, and if it is low, they can basically be expressed with Forrestal formula.The experiments of three types of warhead-shape projectiles penetrating concrete targets have been carried up on the light-gas gun. The result of experiments indicates that the penetration depth of cone-shaped projectile whose half taper angle is 22.5 degree is greater than that of the projectile whose half taper is 45 degree. And the penetration depth of ogive-nose projectiles whose Caliber-Radius-Head(CRH) equals to 4 is the largest of the three types of projectiles.By the finite element program, the process of projectiles penetrating the target has been simulated. The results agree with the experiment approximately. And the effect of warhead shapes on the penetration depth accords with the experiment.In order to research the effect of the warhead shapes of long-rod projectiles on penetration depth, the experiments of which six types of CRH projectiles penetrate steel infiltrated fiber concrete is done. The experiment results demonstrate that the penetration depth changes with the Caliber-Radius-Head. The penetration depth of experiment agrees with the result from the Bernard formulae. Though the volumes of penetration are somewhat scatter, they are basically linear with the kinetic energy of impacting.