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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (8): 1808-1815.

• Paper •

Computational Model for the Critical Ricochet Angle of a Tungsten Alloy Long Rod Projectile Impacting a Thick-walled Cylinder

JIN Wen, MEN Jianbing, JIANG Jianwei, PENG Jiacheng, LI Mei

1. (State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China)
• Online:2022-07-29

Abstract: As new technologies such as electromagnetic orbit launch emerge, high-speed long rod projectiles play a prominent role in attacking thick-walled targets, such as short-range air defense anti-earth penetrating weapons. The key for rod ammunition to be effective is to achieve stable penetration without ricochet when hitting the target. To address the ricochet problem of tungsten alloy long rod projectiles impacting thick-walled cylindrical targets, a projectile-target contact model is developed by simplifying the target and analyzing variables. A finite element simulation model is established and verified based on LS-DYNA3D nonlinear dynamics software. Simulations are performed with an impact velocity ranging from 1 000 to 2 200 m/s and a hit-offset angle of 0°-40°. Then, a modified computational model based on Rosenberg is constructed by using fitted data. Compared with numerical simulation, verification results show that the model is suitable for determining the ricochet boundary of tungsten alloy long rod projectiles impacting thick-walled cylinder targets. The model is capable of predicting the critical ricochet angle when the projectile impacts the target.

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