SIMULATION OF METEOROID-VELOCITY IMPACT BY USE OF DENSE PROJECTILES

摘要

A technique is described for simulating the impacts of semi-infinite targets by low-density, low-fineness ratio cylinders at meteoroid velocities by impacting high-density, low-velocity projectiles. Conditions for simulation are stated and embodied in a model forming the basis of the technique. The feasibility of the technique is experimentally investigated by simulating the impacts of semi-infinite aluminum targets by polyethylene plastic cylinders of various low-fineness ratios and the same velocity of 11.3 km/sec. The penetrations were simulated at lower velocities to within 10 percent by impacting aluminum, steel, nickel, and copper projectiles, but only to within 30 percent by impacting platinum projectiles. In application of the technique, the impacts of semi-infinite aluminum targets by cylinders of polyethylene and porous aluminum (0. 44 g/cm a) at velocities of 15.2 and 22 km/s« respectively, were simulated.