Study of Protective Properties of Single and Compound Screens at High-Velocity Impact

摘要

Results of experimental study of protective properties for some modifications of Whipple shield at hyper-velocity impact by a steel particle are presented. Explosive launching devices consisting of compact steel elements accelerated impactors up to velocity of 6 km/s. Steel projectiles had weights of 10 g and 20 g. Shield systems consisting of one- , two- and three-screen shields made of materials with various strength parameters and specific weights were studied. X-ray recording was used to reveal dynamics of formation of fragments cloud behind barrier, dispersion the degree of screen material and impacting particle. It is shown that a certain combination of screen thicknesses exists (at condition of constancy of summarized specific weight of the compound screen), which results in a minimized depth of crater in the protected plate (target). It follows from the experiments that the protective properties of screens are mostly determined by values of the parameters, which include areal density of screen and impact pressure.