Preliminary theoretical study on the rebound effect of projectiles penetrating ultra-high performance concrete targets

ZHU Qing; LI Shutao; CHEN Yeqing; MA Shang

doi:10.11883/bzycj-2022-0513

Volume 43 Issue 9

Sep. 2023

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ZHU Qing, LI Shutao, CHEN Yeqing, MA Shang. Preliminary theoretical study on the rebound effect of projectiles penetrating ultra-high performance concrete targets[J]. Explosion And Shock Waves, 2023, 43(9): 091405. doi: 10.11883/bzycj-2022-0513

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ZHU Qing, LI Shutao, CHEN Yeqing, MA Shang. Preliminary theoretical study on the rebound effect of projectiles penetrating ultra-high performance concrete targets[J]. Explosion And Shock Waves, 2023, 43(9): 091405. doi: 10.11883/bzycj-2022-0513

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Preliminary theoretical study on the rebound effect of projectiles penetrating ultra-high performance concrete targets

doi: 10.11883/bzycj-2022-0513

Institute of Defense Engineering, Academy of Military Sciences, Beijing 100036, China

Received Date: 2022-11-14
Rev Recd Date: 2023-03-01

Available Online: 2023-03-24

Publish Date: 2023-09-11

Abstract

Abstract

It is a developing trend of protection engineering to use high resistance materials such as ultra-high performance concrete to construct bullet-shielding structures. The phenomenon of projectile body rebound was found in the tests of projectile body penetrating ultra-high performance concrete. The projectile rebound effect is very important in the study of engineering protection, weapon damage and warhead design. In order to study the rebound velocity of projectile body after penetration and its influencing factors, the stress of projectile body from penetration to rebound was analyzed. Based on the expression of penetration resistance given by the cavity expansion theory, a one-dimensional elastic bar potential energy model was established from the perspective of the accumulation of deformation energy by penetration resistance, and a one-dimensional stress wave model was established from the perspective of stress wave generated by penetration resistance. The analytical solutions of the rebound velocity were derived from the two models respectively, and the physical quantities affecting the rebound velocity were analyzed. Through numerical simulation, the rebound phenomenon of the projectile body after penetrating the ultra-high performance concrete is reproduced, and the numerical results of the rebound velocity agree well with the two analytical solutions. Through numerical calculation of the same penetration model with different material parameters, the relationship between the rebound velocity and the material parameters in the analytical solution is verified, and the reliability of the theoretical model is proved. The results show that the projectile body accumulates deformation potential energy due to penetration resistance, and the projectile body bounces back due to the release of deformation potential energy after penetration. The initial rebound velocity is independent of the target velocity, proportional to the target material, yield strength and warhead shape coefficient, and inversely proportional to the elastic modulus and density of the projectile body. The results can preliminarily predict the rebound velocity and provide a reference for the design of ultra-high performance concrete protective structure and warhead.
- penetration of projectile,
- ultra-high performance concrete,
- rebound effect,
- theoretical model

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References(24)

References

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