Experiments on the perforation of pressure vessels&rsquo; front walls caused by a hypervelocity impact

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (2) : 41-45.

Experiments on the perforation of pressure vessels’ front walls caused by a hypervelocity impact

GAI Fangfang1,YAN Longhai1,GAO Guofu1,YU Yuemin1,TANG Yuling2

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Abstract

To study the damage of pressure vessels' front walls by the hypervelocity impact of spherical projectiles,a method combining experimental and theoretical analyses was proposed.Hypervelocity impact experiments were performed by using a two-stage light gas gun to obtain the damage characteristics of pressure vessel front walls.The experimental results show that the damage mode of the front walls is circular perforation,the perforation diameter is approximately linear with the impact velocity of projectiles,and the internal pressure in the vessel has little effect on the perforation diameter.Then,based on the experimental results,considering the two patterns that the projectile is fragmentized and not,a prediction model for the front wall perforation was built,assuming the impact perforation energy of projectile being a local uniform load.By the experiments,the prediction model was proved to be valid.

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hypervelocity impact / gas-filled pressure vessels / perforation / impact testing / prediction model

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GAI Fangfang1,YAN Longhai1,GAO Guofu1,YU Yuemin1,TANG Yuling2. Experiments on the perforation of pressure vessels’ front walls caused by a hypervelocity impact[J]. Journal of Vibration and Shock, 2019, 38(2): 41-45

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