Abstract

The penetration performance of homogeneous disk (μ = 0) and thick walled disk (μ < 0.5) projectiles are investigated numerically for length-to-diameter ratio (L/D) of 1/8 and 1/4, where μ is the ratio of inner to outer diameter of a disk. Penetrations of tungsten alloy projectiles up to 4 successive solid disks (SD) and hollow disks (HD) with spacing of 1.5, 2 and 3 diameters into rolled homogeneous armor (RHA) at 2.6 km/s were simulated with a finite difference nonlinear wave propagation program. The most obvious results from the calculations are that even at 2.6 km/s the total penetration of a 4-segmented projectile can not be obtained simply be multiplying the depth of a single disk by four, especially for L/D = 1/8. Although HD may be more efficient, in terms of mass, than SD of equal outer diameter, it is observed that precursor or jet interacts with a train of spaced HD. This interaction significantly reduces the penetration performance, which was also measured in the long tubular projectiles. The degradation in total penetration becomes worse as μ increases. For HD of L/D = 1/4 case, the degradation in penetration becomes less since the effect of the interaction of jet with successive disks is relatively small.

This content is only available via PDF.
You do not currently have access to this content.