Investigation on the technology of soft recovery of fragment produced by metal cylindrical shell subjected to explosive loading

ZHANG Shiwen; LI Yinglei; CHEN yan; DAN Jiakun; GUO Zhaoliang; LIU Mingtao

doi:10.11883/bzycj-2020-0449

Volume 41 Issue 11

Nov. 2021

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ZHANG Shiwen, LI Yinglei, CHEN yan, DAN Jiakun, GUO Zhaoliang, LIU Mingtao. Investigation on the technology of soft recovery of fragment produced by metal cylindrical shell subjected to explosive loading[J]. Explosion And Shock Waves, 2021, 41(11): 114102. doi: 10.11883/bzycj-2020-0449

Citation:

ZHANG Shiwen, LI Yinglei, CHEN yan, DAN Jiakun, GUO Zhaoliang, LIU Mingtao. Investigation on the technology of soft recovery of fragment produced by metal cylindrical shell subjected to explosive loading[J]. Explosion And Shock Waves, 2021, 41(11): 114102. doi: 10.11883/bzycj-2020-0449

Citation:

ZHANG Shiwen, LI Yinglei, CHEN yan, DAN Jiakun, GUO Zhaoliang, LIU Mingtao. Investigation on the technology of soft recovery of fragment produced by metal cylindrical shell subjected to explosive loading[J]. Explosion And Shock Waves, 2021, 41(11): 114102. doi: 10.11883/bzycj-2020-0449

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Investigation on the technology of soft recovery of fragment produced by metal cylindrical shell subjected to explosive loading

doi: 10.11883/bzycj-2020-0449

Institute of Fluid Physics, China Academu of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2020-12-04
Rev Recd Date: 2021-07-05

Available Online: 2021-11-08

Publish Date: 2021-11-23

Abstract

Abstract

According to the requirements on the soft recovery of fragments of expanding cylindrical metal shells under explosion loading, this paper presents a recovery device combining low density polyurethane foam and water medium through theoretical analysis and numerical simulation. Compared to traditional recovery device designed with a single material, the combined recovery device can reduce the amplitude of impact pressure, which is produced by the initial interaction of low impedance polyurethane foam with high speed fragments, by about 1/3 compared to the impact pressure produced by water, and maintain the high decay rate of fragment speed. It can also make full use of the advantages of high density of water medium when the fragment speed is less than 0.5 km/s, which can reduce the decay thickness of the recovery device based on single polyurethane foam. Based on the device, the recovery experiment of expansion and fracture of 304 stainless steel cylindrical shell under explosive loading is carried out. Through the measurement of the wall velocity of the recovery tank and the appearance inspection after the experiment, it is implied that the wall and bottom of the recovery tank are in good condition and can be reused. According to the statistics of the recovered fragments, the recovery rate of the fragments is more than 85%, and the internal and external interfaces of fragments are highly recognizable, the turning blade lines on the surface of the fragments are clearly visible, and several non-penetrating cracks are visible, which verified that the impact damage of the recovery device to the fragments is significantly reduced. Acording to the fracture and surface information of the fragments, the approximate position of the fragments in the metal cylindrical shell is inferred. Finally, the statistical results of the average thickness and mass distribution of the recovered fragments are given.
- impact dynamics,
- expansion fracture,
- soft-recovery,
- secondary damage

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References(17)

References

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