Oblique penetration of elliptical cross-section projectile into metal target

WEI Haiyang; ZHANG Xianfeng; XIONG Wei; ZHOU Jiequn; LIU Chuang; FENG Xiaowei

doi:10.11883/bzycj-2021-0291

Volume 42 Issue 2

Feb. 2022

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Article Navigation > Explosion And Shock Waves > 2022 > 42(2): 023304

WEI Haiyang, ZHANG Xianfeng, XIONG Wei, ZHOU Jiequn, LIU Chuang, FENG Xiaowei. Oblique penetration of elliptical cross-section projectile into metal target[J]. Explosion And Shock Waves, 2022, 42(2): 023304. doi: 10.11883/bzycj-2021-0291

Citation:

WEI Haiyang, ZHANG Xianfeng, XIONG Wei, ZHOU Jiequn, LIU Chuang, FENG Xiaowei. Oblique penetration of elliptical cross-section projectile into metal target[J]. Explosion And Shock Waves, 2022, 42(2): 023304. doi: 10.11883/bzycj-2021-0291

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Oblique penetration of elliptical cross-section projectile into metal target

doi: 10.11883/bzycj-2021-0291

1.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
Institute of System Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2021-07-07
Accepted Date: 2022-01-13
Rev Recd Date: 2021-09-17

Available Online: 2022-02-10

Publish Date: 2022-02-28

Abstract

Abstract

In order to study the penetrating trajectories of elliptical cross-section projectiles into semi-infinite metal targets, a penetration trajectory model was established based on the dynamic cavity expansion theory and local interaction model. The shape function of the elliptical cross-section projectile was developed based on the local interaction model, and the resistance model derived from the dynamic cavity expansion theory was used to calculate the forces and moments acting on the elliptical cross-section projectile under the local Cartesian coordinate system. Thus, the factors affecting the projectile penetration trajectory were considered, including the major axis to minor axis ratio of the cross-section, the angle around the projectile axis and the striking velocity. Then, oblique penetrating experiments were carried out at a striking velocity ranging from 850 to950 m/s and an oblique angle ranging from 0° to 20°. Furthermore, the model was validated by experimental results. Finally, the influence of the major axis to minor axis ratio of the cross-section, the angle around the projectile axis and the striking velocity on the penetration trajectory was analyzed. When the major axis to minor axis ratio is 1.0, the projectile is degenerated into an ogive-nosed one. With the increase of this ratio, the stability of the elliptical cross-section projectile reduces. The optimal value of the major axis to minor axis ratio is 1.0, and the penetration trajectory is the most stable at this time. The penetration trajectory will change from a two-dimensional plane curve to a three-dimensional space curve when the angle around the projectile axis varies. When the angle around the projectile axis is 0° or 90°, the penetration trajectory is in a two-dimensional plane. Otherwise, the penetration trajectory is a three-dimensional space curve. The increasement of the attitude angle of the elliptical cross-section projectile decreases from 18.6° to 17.8° when the striking velocity increases from 800 m/s to 1000 m/s.
- elliptical cross-section projectile,
- oblique penetration,
- penetration trajectory model,
- semi-infinite metal target

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References

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