At present, spherical projectiles are mainly used to study hypervelocity impact debris clouds, and most of the actual shapes of space debris are not spherical. Therefore, it is necessary to improve and deepen the research on hypervelocity impact debris clouds of non-spherical projectiles. Therefore, the nonlinear dynamics software AUTODYN-3D is used to numerically simulate and analyze the debris cloud and perforation characteristics of the thin plate generated by the hypervelocity impact of the cube projectile on the aluminum thin plate. The evolution process of the debris cloud within 10μs of the hypervelocity impact of the 1.25mm thick aluminum thin plate by the cube projectile at 5km/s under three impact attitudes is obtained, and the velocity parameters of the debris cloud feature points and the perforation characteristic parameters of the thin plate at 10μs with the projectile impact attitude, impact velocity and dimensionless parameters are obtained. The ratio of the thickness of the thin plate to the side length of the cube projectile H/L changes. The analysis results show that the debris clouds under the three impact attitudes have entered a stable uniform expansion stage after 4μs of the collision. Except that the V2d/V of the angular impact is not affected by the impact velocity V and the V2d/V of the surface impact is not affected by the ratio of the thickness of the thin plate to the side length of the cube projectile H/L, the velocity parameters of the feature points under other conditions increase with the increase of V and decrease with the increase of H/L ; the increase of the impact velocity V and the ratio of the thickness of the thin plate to the side length of the cube projectile H/L contributes to the expansion of the perforation size, while the impact attitude has a more significant effect on the shape characteristics of the perforation of the thin plate.
CHENG Jian-feng
,
LIU Xiao-ling
,
DENG Yong-jun
,
HAN Wei-long
,
LUO Hua
,
LIU Xin
. Simulation Analysis of Distribution Characteristics and Perforation Characteristics of Fragments of Cubic Body Projectile Impacting Aluminum Sheet at Ultra-High Speed[J]. Journal of Space Science and Experiment, 2023
, 23(3)
: 36
-45
.
DOI: 10.19963/j.cnki.2096-4099.2023.03.004
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