AN INVESTIGATION OF THE DEBRIS CLOUD PRODUCED BY THE IMPACT OF SPHERES ON THIN METAL SHEETS
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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An experimental investigation of the debris cloud produced by the impact of 18 inch. diameter spheres of copper and cadmium on 116 inch. sheets of like materials was conducted. Calculations of the energy delivered to copper witness plates by solid and liquid phases of the debris cloud were made using volume-energy relationships. Velocity of the cloud front was determined through use of sequential flash X-rays. Phases of the cloud were determined by employing a combination of photographic, radiographic, and crater measurement techniques. Variations in the phases of the cloud with three selected velocities for each bumper-projectile combination were compared with the predicted phase in the velocity range of 23000 to 3000 ftsec. Energy, energy density, momentum, and mass delivered to witness plates are determined as a function of cone angle.