Experiments and dimensional analysis ofhigh-speed projectile penetration efficiency

Song Meili; Li Wenbin; Wang Xiaoming; Feng Jun; Liu Zhilin

doi:10.11883/1001-1455(2016)06-0752-07

Volume 36 Issue 6

Oct. 2018

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Song Meili, Li Wenbin, Wang Xiaoming, Feng Jun, Liu Zhilin. Experiments and dimensional analysis ofhigh-speed projectile penetration efficiency[J]. Explosion And Shock Waves, 2016, 36(6): 752-758. doi: 10.11883/1001-1455(2016)06-0752-07

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Experiments and dimensional analysis ofhigh-speed projectile penetration efficiency

doi: 10.11883/1001-1455(2016)06-0752-07

Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2015-04-13
Rev Recd Date: 2016-01-06
Publish Date: 2016-11-25

Abstract

Abstract

This paper carried out high-speed penetration experiments using semi-infinite plain concrete targets with different projectile materials and aspect ratios to investigate the effects of striking velocity and material strength on projectile loss and penetration efficiency. Characterized with caliber-radius-head (CRH) 3.0 and 30-mm diameter, the ogive-nose projectiles were launched at high-speed striking velocities between 880-1 900 m/s to impact the concrete target. The measured experiment data indicates that the penetration efficiency is in parabolic relation with the striking velocity, i.e. the maximum penetration efficiency corresponds to an impact velocity of about 1 400 m/s. The main abrasion occurs around the projectile nose while only negligible erosion is observed at the projectile shank and end cap. When the speed exceeds the characteristic impact velocity, the projectile's mass loss is so serious that even bending deformation or disintegration occurs. When the projectile strength is nearly doubled, the mass loss is reduced by about 80%. Based on the experimental data, the relationship function of dimensionless penetration efficiency and impact velocity was achieved using dimensional analysis. The dimensionless model obtained in this paper is capable of predicting the corresponding impact speed for the maximum penetration efficiency, thereby providing theoretical guidance for high-speed simulated penetration experiments.
- mechanics of explosion,
- penetration efficiency,
- high-speed penetration,
- concrete target,
- mass erosion,
- dimensional analysis

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References

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