On penetration depth of typical earth-penetrating projectilesinto concrete targets considering the scaling effect

CHENG Yuehua; JIANG Pengfei; WU Hao; TAN Keke; FANG Qin

doi:10.11883/bzycj-2021-0373

Volume 42 Issue 6

Jun. 2022

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CHENG Yuehua, JIANG Pengfei, WU Hao, TAN Keke, FANG Qin. On penetration depth of typical earth-penetrating projectilesinto concrete targets considering the scaling effect[J]. Explosion And Shock Waves, 2022, 42(6): 063302. doi: 10.11883/bzycj-2021-0373

Citation:

CHENG Yuehua, JIANG Pengfei, WU Hao, TAN Keke, FANG Qin. On penetration depth of typical earth-penetrating projectilesinto concrete targets considering the scaling effect[J]. Explosion And Shock Waves, 2022, 42(6): 063302. doi: 10.11883/bzycj-2021-0373

Citation:

CHENG Yuehua, JIANG Pengfei, WU Hao, TAN Keke, FANG Qin. On penetration depth of typical earth-penetrating projectilesinto concrete targets considering the scaling effect[J]. Explosion And Shock Waves, 2022, 42(6): 063302. doi: 10.11883/bzycj-2021-0373

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On penetration depth of typical earth-penetrating projectilesinto concrete targets considering the scaling effect

doi: 10.11883/bzycj-2021-0373

1.
College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
PLA 96911 Corps, Beijing 100011, China
3.
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA Army Engineering University, Nanjing 210007, Jiangsu, China

Received Date: 2021-09-07
Rev Recd Date: 2021-11-15

Available Online: 2022-04-22

Publish Date: 2022-06-24

Abstract

Abstract

Accurately evaluating the penetration depth of precision-guided weapons can provide an important reference for the design of protective engineering. The existing work mainly focuses on small or medium caliber projectiles and normal strength concrete targets. Besides, the applicability of existing calculation methods to predict the penetration depth of typical large-caliber earth-penetrating projectiles is worthy of discussion due to the scaling effect. Firstly, by analyzing the existing penetration test data, the main cause of the size effect of penetration depth is that the particle size of the coarse aggregate is not scaled with the projectile size accordingly. Then, five tests were carried out with 100.0-mm and 203.0-mm caliber scaled earth-penetrating projectiles penetrating into C40 and C100 concrete targets. The corresponding two-dimensional axisymmetric finite element model was established. By adjusting the predefined value of the eroding plastic strain to make the numerical penetration depth close to the test data, the constitutive model parameters, as well as the matched mesh size and the erosion criterion, were determined. Thus, a practical finite element analyses method for the penetration depth of large-caliber projectiles into concrete was proposed and verified. Furthermore, for the above two concrete strength grades, the penetration depths of the five typical earth-penetrating projectiles of the U.S. military into concrete at different impact velocities (100－600 m/s) were determined, and the applicability of the existing seven empirical or semi-empirical formulas was evaluated. The comparison results show that the ACE formula can obtain a better prediction of the penetration depth. Finally, the attenuation law of the penetration depth with the compressive strength of concrete was confirmed by fitting the existing penetration test data. The corresponding penetration depths of the five typical earth-penetrating projectiles into the C40－C200 concrete targets at the velocity of 340 m/s were determined. The present work and conclusions can be directly used in the protective engineering design.
- concrete target,
- penetration depth,
- earth-penetrating projectile,
- scaling effect

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References(61)

References

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