Penetration performance of double-ogive-nose projectiles

High-velocity Penetration of Concrete Targets with Three Types of Projectiles: Experiments and Analysis

“…The new crater depth model considering both mass and initial velocity was established and can be used to analyze the crater depths of the concrete targets penetrated by the projectiles of different weights and initial velocities, especially for some large-mass projectiles. The experiments were analyzed in combination with the relevant work of our research team Shan 2015;Shan et al, 2014;Chai, 2014;Liu et al, 2015;Zhang, 2016;Wu, 2013;Zhang et al, 2016). The results showed that, compared to the conventional ogive-nose projectile, the double-ogive-nose projectile has a higher penetration ability, and the grooved-tapered projectile has a better trajectory stability.…”

“…The double-ogive-nose projectile has a smaller penetration resistance and a bigger penetration depth. The theoretical calculation and numerical simulation results illustrated that the double-ogive-nose projectile optimally designed by Liu et al (2015) based on the ogive-nose projectile with CRH=5 had an obvious advantage in terms of the penetration ability. In the present study, the advantage of the double-ogive-nose projectile optimized based on the ogive-nose projectile with CRH=3 was not very obvious.…”

“…The double-ogive-nose projectiles were optimized according to Liu et al (2015) and had the same mass as the conventional ogive-nose projectiles by adjusting the inner hollow parts. The grooved-tapered projectiles had conventional ogival noses and tapered shanks with six symmetrical grooves (Zhang, 2016).…”

“…Calculated following the method of Liu et al (2015), the projectile nose factors N of the conventional ogive-nose (ON) and double-ogive-nose (DON) were 0.1076 and 0.1033, respectively. The penetration depths and the decelerations of these two types of projectiles when penetrating into semi-infinite concrete targets could be provided with  = 2300 kg/m 3 and c f  =40MPa using Equations (3) and (4).…”

“…Chai (2014) presented that the new nose shape comprising a conventional ogive-nose and a small front cylinder (nose-pin) could reduce the penetration resistance at low or medium speed and increase the penetration depth. Based on classical cavity expansion theory, Liu et al (2015) proposed an optimal design scheme of a double-ogive-nose projectile with a smaller penetration resistance by researching the influence of the nose shape on the inertial resistance term under a high-velocity penetration. Meanwhile, Zhang (2016) studied the mechanical model, dynamic structure response and trajectory stability of grooved-tapered projectiles through experiments and numerical simulations.…”