Penetration performance of double-ogive-nose projectiles

•A double-ogive-nose penetration body scheme with a low penetration resistance is proposed.•The influence of the nose shape coefficient N∗ on the penetration resistance and DOP is discussed.•The feasibility of the proposed method is validated through theoretical, experimental, and simulation results.

The penetration ability of projectiles is closely related to their nose shape as this influences the high-velocity or ultrahigh-velocity kinetic-energy penetration of a rigid projectile. Based on classical cavity expansion theory and a double-ogive-nose scheme, this study set out to analyze the dependency relationship between the nose shape factor N∗ and the double-ogive characteristic parameters. This paper first discusses the effects of different nose shapes on the penetration performance of a projectile. The paper then proposes a double-ogive-nose penetration body scheme with a low penetration resistance. A penetration experiment with the double-ogive-nose projectile is set up and a Holmquist–Johnson–Cook concrete [1] model is described, together with its application to the prediction of the tendency of the depth of penetration. A comparison between the results of the experiment, simulation, and calculation for the ogive nose and double-ogive-nose projectiles proves that the analysis and the proposed method are both reasonable and feasible.