On the ricochet of sharp-nosed rigid projectiles from metallic plates

• Published in: International journal of impact engineering Vol. 178; p. 104621
• Main Authors: Vayig, Y., Rosenberg, Z.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2023
• Subjects: Ballistic limit velocity; Plate perforation; Threshold ricochet angle; Trajectory changes; Threshold ricochet angle; Ballistic limit velocity; Plate perforation; Trajectory changes
• ISSN: 0734-743X; 1879-3509
• DOI: 10.1016/j.ijimpeng.2023.104621

•The oblique impacts of rigid sharp-nosed projectiles at metallic plates are studied through 3D numerical simulations.•We found that the threshold ricochet angles of these projectile/plate pairs can be accounted for by a simple relation which we derived through the numerical results.•We also compared several experimental results with our predictions from the numerically based model, and found good agreement between them. We present a numerical study on sharp-nosed rigid projectile obliquely impacting ductile metallic plates. We followed the trajectory changes of these projectiles including their ricochet behavior and we determined their threshold ricochet angles. These are the impact obliquities at which the projectile moves along a trajectory parallel to the plate's face. These angles were found to be related to the normalized impact velocities of the projectile/plate pair, which are defined by the ratio between the impact velocity and the ballistic limit velocity, at normal incidence, for the given pair. This numerically-derived empirical relation was shown to account for various rigid projectiles, with different nose shapes and aspect ratios, impacting aluminum and steel plates of various strengths. We also found that this relation accounts for experimental data with aluminum and steel plates obliquely impacted by 7.62 mm AP projectiles.