Experimental Study on Charge Structure under High-speed Fragment Impact Coupling with Fast Cook-off

ZHOU Xu; ZHU Gen; WAN Kun; LI Chong; HU Yupeng; WU song; ZHOU Benquan; FENG Xiaowei; NIE Shaoyun; LI Minghai

doi:10.19554/j.cnki.1001-3563.2026.09.009

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (9) : 91-97. DOI: 10.19554/j.cnki.1001-3563.2026.09.009

Special Topic on Ammunition Response and Protection Technology under Intensive Dynamic Loading

Experimental Study on Charge Structure under High-speed Fragment Impact Coupling with Fast Cook-off

ZHOU Xu^a, ZHU Gen^a, WAN Kun^a, LI Chong^a, HU Yupeng^a,*, WU song^a, ZHOU Benquan^a, FENG Xiaowei^a, NIE Shaoyun^b, LI Minghai^a

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Abstract

The work aims to assess the response behavior of a charge structure subjected to fragment impact under a rapid heating environment and evaluate the safety of abnormal accident environments. An experimental method combining high-speed fragment impact with fast cook-off was proposed. The experiment conditions, loading and measurement requirements, safety protections and reaction levels determinations were all described in detail. The average temperature of flame was higher than 800 ℃, the burning duration was 2 minutes, and the fragment velocities were within the range of (1 830±60) m/s in this experiment. The results showed that the response behaviors under high-speed fragment impact and fast cook-off were non-reactive and combustion, respectively. However, the reaction levels of the charge structure under the environment of high-speed fragment impact coupling with fast cook-off were blast, which was much higher than the test results of the single force thermal load. Finally, the experimental methods for high-speed fragment impact coupling with fast cook-off were further improved in terms of visualization of the experiment process and quantification of the response behavior based on propane burners. In conclusion, the high-speed fragment impact coupling with fast cook-off experimental method established in this paper can provide support for the subsequent verification of the safety assessment of the charge structure in the scenario of being subjected to high-speed fragment impact while encountering an unexpected fire.

Key words

explosion mechanics / charge structure / safety / high-speed fragment impact / fast cook-off

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ZHOU Xu, ZHU Gen, WAN Kun, LI Chong, HU Yupeng, WU song, ZHOU Benquan, FENG Xiaowei, NIE Shaoyun, LI Minghai. Experimental Study on Charge Structure under High-speed Fragment Impact Coupling with Fast Cook-off[J]. Packaging Engineering. 2026, 47(9): 91-97 https://doi.org/10.19554/j.cnki.1001-3563.2026.09.009

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