Comparative study of simulation and experiment on shielding performance of shield with separated rear wall

WEN Xuezhong; HUANG Jie; ZHAO Junyao; KE Fawei; MA Zhaoxia; LIU Sen

doi:10.11883/bzycj-2020-0323

Volume 41 Issue 2

Feb. 2021

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WEN Xuezhong, HUANG Jie, ZHAO Junyao, KE Fawei, MA Zhaoxia, LIU Sen. Comparative study of simulation and experiment on shielding performance of shield with separated rear wall[J]. Explosion And Shock Waves, 2021, 41(2): 021409. doi: 10.11883/bzycj-2020-0323

Citation:

WEN Xuezhong, HUANG Jie, ZHAO Junyao, KE Fawei, MA Zhaoxia, LIU Sen. Comparative study of simulation and experiment on shielding performance of shield with separated rear wall[J]. Explosion And Shock Waves, 2021, 41(2): 021409. doi: 10.11883/bzycj-2020-0323

Citation:

WEN Xuezhong, HUANG Jie, ZHAO Junyao, KE Fawei, MA Zhaoxia, LIU Sen. Comparative study of simulation and experiment on shielding performance of shield with separated rear wall[J]. Explosion And Shock Waves, 2021, 41(2): 021409. doi: 10.11883/bzycj-2020-0323

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Comparative study of simulation and experiment on shielding performance of shield with separated rear wall

doi: 10.11883/bzycj-2020-0323

Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, Sichuan, China

Received Date: 2020-09-11
Rev Recd Date: 2020-12-20

Available Online: 2021-02-02

Publish Date: 2021-02-05

Abstract

Abstract

In order to study the feasibility and effectiveness of the shield with separated rear wall (SRW), both the hypervelocity experiments and simulations were performed to investigate the performances of shields with different separated rear walls. The effect of impact velocity on the shielding performance was also studied. Three kinds of shields were designed, including a Whipple shield and two kinds of SRW shields. The AUTODYN software was based on to numerically simulate the penetration of 6.0-mm-diameter aluminum projectiles with the initial impact velocities of 5.0, 6.0, 7.0 and 8.3 km/s, respectively, into the shields. By comparing the damages in the backs of the rear walls among the three kinds of shields, the preliminary conclusion was drawn that the performances of the SRW shields were better than that of the Whipple shield. And the higher the impact velocity, the more obvious the advantage of the SRW shields. The tests were carried out in the hypervelocity ballistic range of China Aerodynamics Research and Development Center. The diameter of an aluminum projectile is 6.0 mm, and the impact velocity is about 8.3 km/s. The perforation and spall characteristics of the rear walls in the tests are consistent with the simulated results. The experiments not only prove the effectiveness of the simulation method, but also prove that the SRW shields have better protecting performances. Compared with the complete aluminum plate, a new free interface is added inside the structures of the SRW shields, which will reflect the shock wave generated in the impact process. Thus the strength of the shock wave that spreads to the second plate is reduced, and the damage in the SRW shields is alleviated. As the impact velocity increases, the main damage mode on the rear wall will change from the penetration damage mode to the impact damage mode, and the propagation of shock wave will be the main reason for the damage of the rear wall, which leads to better protecting performance of the SRW shields at higher impact velocities.
- space debris,
- Whipple shield,
- hypervelocity impact,
- rear wall

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References(16)

References

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