Ricochet of a tungsten heavy alloy long-rod projectile from deformable steel plates

Abstract

Ricochet of a tungsten heavy alloy long-rod projectile from oblique steel plates with a finite thickness was investigated numerically using a full three-dimensional explicit finite element method. Three distinctive regimes resulting from oblique impact depending on the obliquity, namely simple ricochet, critical ricochet and target perforation, were investigated in detail. Critical ricochet angles were calculated for various impact velocities and strengths of the target plates. It was predicted that critical ricochet angle increases with decreasing impact velocities and that higher ricochet angles were expected if higher strength target materials are employed. Numerical predictions were compared with existing two-dimensional analytical models. Experiments were also carried out and the results supported the predictions of the numerical analysis.

Ricochet of 0.3″ AP projectile from inclined polymeric plates

“…Goldsmith [1] reviewed much of the literature concerning inclined plate impact, including the analytical model of Tate [2] for rigid long rod ricochet. In recent works on long rods [3,4] the bending of the nose was taken into account, in order to simulate a more realistic situation for these interactions. The most extensive work on this subject is by Recht and Ipson [5] who analyzed the various parameters involved in the interaction of armor piercing (AP) projectiles with inclined metallic plates.…”

Treatment of contact separation in Eulerian high-speed multimaterial dynamic simulations

“…The problem involving an oblique impact of two bodies is important in practical applications. The phenomenon of ricochet of a projectile over the target has been analyzed in the past to simulate the oblique impact problem . When ricochet results in the situation depicted in Figure , there is a sustained interaction between the projectile and the target throughout in which the projectile is deflected away and separates from the target.…”

“…The angle of impact is 10°, and the impact velocity is 1000 m/s. The length‐to‐width ratio for the projectile is 10.7 as used in previous work . The grid spacing is 0.2 mm for this simulation.…”

Oblique penetration of tungsten alloy rod to finite-thickness metal plate

“…Compared with the normal penetration (the velocity direction, the axis of projectile and the normal direction of the target are on the same line), the oblique penetration is more complex. The resistance of the target plate to the projectile is asymmetric, which leads to ballistic deflection and even fracture of projectile in the penetration process (Lee et al, 2002;Børvik et al, 2011;Tiwari et al, 2018;Lidén et al, 2011Lidén et al, , 2012. Therefore, the oblique penetration of tungsten alloy rod into finitethickness metal plate has always been an important subject in the field of armor piercing.…”