Crater morphology of a projectile penetrating a thick concrete target

LI Ming; WANG Kehui; ZOU Huihui; DUAN Jian; GU Renhong; DAI Xianghui; YANG Hui

doi:10.11883/bzycj-2021-0294

Volume 42 Issue 8

Sep. 2022

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LI Ming, WANG Kehui, ZOU Huihui, DUAN Jian, GU Renhong, DAI Xianghui, YANG Hui. Crater morphology of a projectile penetrating a thick concrete target[J]. Explosion And Shock Waves, 2022, 42(8): 083302. doi: 10.11883/bzycj-2021-0294

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LI Ming, WANG Kehui, ZOU Huihui, DUAN Jian, GU Renhong, DAI Xianghui, YANG Hui. Crater morphology of a projectile penetrating a thick concrete target[J]. Explosion And Shock Waves, 2022, 42(8): 083302. doi: 10.11883/bzycj-2021-0294

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Crater morphology of a projectile penetrating a thick concrete target

doi: 10.11883/bzycj-2021-0294

Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China

Received Date: 2021-07-08
Accepted Date: 2022-07-07
Rev Recd Date: 2021-12-14

Available Online: 2022-07-13

Publish Date: 2022-09-09

Abstract

Abstract

To study the crater effect of the projectile penetrating a thick concrete target, the crater phenomenon in the penetration test was summarized, the predictive effect of the empirical formula on the crater depth, crater diameter, and crater angle was analyzed. Using the dimensional analysis method, new calculation formulas for the crater formation effect and energy consumption at the crater formation stage were established. The formulas for the crater formation effect take into account the influence of factors such as impact velocity, target strength, reinforcement ratio, projectile diameter, and projectile mass. Based on the new calculation formulas, parameterized analysis of the influencing factors of pit formation effect and the energy consumption of pit formation was performed. The results show that the dimensionless crater depth is greatly affected by the strength of the concrete target, the reinforcement ratio, and the projectile mass. For reinforced concrete, with the increase of the impact velocity, the crater depth increases first, then decreases, and then increases. Within the common range of penetration velocity and mass, the crater angle is in the range from 15° to 24°, and the mass has little effect on the crater angle. The energy consumption of the crater formation on the front surface accounts for 10% to 25% of the total kinetic energy of the projectile, and the reinforcement ratio and the strength of the target plate have a weak effect on the proportion of the energy consumption of the crater. The proportion of the energy consumed in the crater stage increases as the mass of the projectile decreases. The calculation results by the new crater effect calculation formulas for the crater depth, crater diameter, and crater angle are in good agreement with the experimental data, which can provide a reference for the design of penetrating projectiles and engineering protection.
- penetration,
- concrete target,
- crater morphology,
- dimensional analysis,
- empirical formula

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References

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