Experimental study on the characters in a pistol cartridge penetrating gelatin

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (4) : 7-11.

HUANG Shan1, XU Cheng1, WEN Yaoke1, DOU Xun2

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Abstract

In order to reveal the injury mechanism to human body from a pistol cartridge, the characteristics of pressure wave and the temporary cavity in the process of pistol cartridge penetrating gelatin were studied by a pressure and high speed photography comprehensive testing system. In this study, 4 ℃, 10% concentration ratio, size of 350 mm×250 mm×175 mm gelatin was used as target; 9 mm 92A pistol cartridge was used as a killing element. Three groups of pressure wave data and cavity images were obtained in 15 m shooting range. The following conclusions could be made from the experiments. ① The pressure wave generated two spike waves, which was similar to a rifle bullet’s waveform. The first wave was caused by pistol cartridge impacting gelatin targets with high speed, and the second was caused by its quickly rolling and releasing energy. The second was higher than the first. The maximum amplitude was about 12 MPa. ② The maximum diameter of the temporary cavity was about 73 mm at 4 000 μs, then it contracted and expanded again, the second maximum diameter was about 64 mm at 9 600 μs, and it reduced by 12%. ③ The diameter of the temporary cavity caused by the pistol cartridge was attenuating as half sine wave curve with the penetration time, in line with the experience formula D=A•ΔE•sin(ωt) and the coefficient was obtained as:A₁=0.05,A₂=0.04, and ω=900.

Key words

pistol cartridge / gelatin / high-speed photography / pressure wave / temporary cavity

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HUANG Shan1, XU Cheng1, WEN Yaoke1, DOU Xun2. Experimental study on the characters in a pistol cartridge penetrating gelatin[J]. Journal of Vibration and Shock, 2017, 36(4): 7-11

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