Tests for damage and failure of rear wall of spherical pressure vessel under hypervelocity impact

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 17-24.

CAI Yuan, YAN Longhai

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Abstract

A second-stage light gas gun is used to launch a spherical aluminum alloy projectile to impact gas-filled spherical pressure vessel. The back wall damage modes are obtained, as well as the gas pressure and the projectile impact velocity on the damage effect of the back wall are studied. According to the test results, the damage modes of the back wall could be divided into three types, and the tearing mode is the unique damage mode of hypervelocity impact on gas-filled pressure vessel. The damage degree and damage scope of the back wall are taken as the characteristic parameters, and the influence of the gas pressure and the projectile velocity on the damage of back wall are obtained by investigating the relationship between the above characteristic parameters and the gas pressure and the projectile velocity. The results show that the damage degree and scope decrease with the increase of the gas pressure. That means, the back wall damage could be mitigated by increasing gas pressure. With the increase of projectile velocity, the damage degree and scope of the back wall firstly increase, then decrease, and then increase.

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Hypervelocity impact / Pressure vessel / Back wall / Damage and failure

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CAI Yuan, YAN Longhai. Tests for damage and failure of rear wall of spherical pressure vessel under hypervelocity impact[J]. Journal of Vibration and Shock, 2021, 40(23): 17-24

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