No abstract

No abstract

No abstract

Results of computations with the use of improved modifiedAlekseevskii-Tate theory (IMATT) are compared to experimental data onhigh-velocity penetration of long rod projectiles into sand in the impactvelocity range of V_0=0.5-3.5 km/s. Projectiles were made of three differentmetals: M1 copper, WNZh tungsten heavy alloy and 30KhGSA steel. The valueof hardening coefficient k in the linear dependence of the projectilematerial yield on pressure could be determined using IMATT and experimentaldata on dependence of differential penetration coefficient K on thepenetration velocity. At penetration in regime of the hydrodynamic erosionof projectile, differential penetration coefficient K could be approximatedjust by dependence on the ratio of the impact velocity of penetration to thevalue of the critical velocity, above which the projectile deformsplastically during penetration. The values of the critical velocity maydiffer for specific projectile material properties as well as the densityand the humidity of sand. Keywords: high-velocity penetration, plastic deforming, yield, hydrodynamic erosion, Alekseevskii-Tate theory, experiment.\

The paper describes ballistic test site equipment used for studying the physical and mechanical properties of materials exposed to intense dynamic loads. To study the properties of shock-compressed substances, explosive shock wave generators based on powerful condensed explosives are used. The methods of dispersal of the used strikers in different throwing modes with different types of guns are briefly described. The methodological development in cannon experiments on light-gas guns is given, in which the conditions of safe acceleration of the strikers in the barrels of the guns and the loading parameters of the latter which provide the required collision speeds of the striker and the target are confirmed. Numerical and experimental results of testing the selected throwing modes are presented.