HIGH-VELOCITY IMPACT OF SEGMENTED RODS WITH AN ALUMINUM CARRIER TUBE

In this paper, we apply the method of ballistic test to investigate th e history and mechanism of the tungsten alloy segmented rod with alumi nium carrier tube and corresponding continuous rod penetrating into se mi-infinite steel target at velocities from 1.8 to 2.0 km / s. The len gth to diameter ratio of the segmented rod is 1 (L / D = 1), the ratio s of length of spacing between segments to diameter (s / d) are 0.5, 1 .0 and 2.0 respectivelly. The results show that the power of penetrati on of the segmented rod with carrier tube is obviously higher then tha t of the corresponding continuous rod with carrier tube. Raising of th e impact velocity, suitably increasing of the length of spacing betwee n segments and filling the spacing with non-metallic material, etc. al l can increase the penetrating power of the segmented rod. When impact velocity is 2.0 km / s, s / d = 2.0, the penetrating power of the seg mented rod is 10% higher than that of the corresponding continuous rod , if the spacing is filled with glass steel (non-metallic material), t he power will be 20% higher. In this paper, we present a simplified mo del of based on hydrodynamics and penetrating mechanics. This model ca n properly discribe the whole penetrating process of segmented rod pen etrating into semi-infinite target. The shape of the crater and depth of penetration, etc. calculated are in good agreement with the results obtained by experiments.