STUDY ON THE INFLUENCE OF THE LINER APEX ANGLE AND LINER THICKNESS ON THE STEEL PENETRATION PERFORMANCE OF A 40 MM ROTATING SHAPED CHARGE

Abstract

This paper investigates the influence of the liner apex angle and liner thickness on the penetration performance of a rotating shaped charge. The authors employed three-dimensional numerical simulations using the mesh-free Smoothed Particle Hydrodynamics (SPH) method implemented in ANSYS Autodyn to analyze the effects of the liner apex angle and liner thickness on the performance of the rotating shaped charge. The object of study is a 40-mm caliber shaped charge warhead. The liner apex angle α was considered in five configurations: 24°, 27°, 30°, 33°, and 36°, while the liner thickness δ was investigated in six configurations: 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, and 1.6 mm. Numerical simulations were carried out for two rotational conditions about the charge axis of symmetry: non-rotating and rotating at 10000 rpm. The simulation results indicate that, in the non-rotating case, there exists an optimal set of liner design parameters at which the penetration depth reaches a maximum value. Similarly, for the rotating case at 10000 rpm, an optimal liner design parameter set is also observed. The proposed research approach can be applied to optimize the structural design of rotating shaped charges.