Numerical simulation on characteristics of debris clouds produced by cylindrical projectiles hypervelocity impact on thin plates

Aimed at investigating the characteristics of debris clouds produced by hypervelocity impact on thin plates by space debris of different shapes,this paper introduces the reliance on domestic aviation materials,the use of the nonlinear dynamic analysis software AUTODYN-2 d and smooth particle dynamics method( SPH) to perform the numerical simulation on debris clouds resulting from the hypervelocity impact on the protective structure of aluminum plate by cylindrical projectile and then analyze the law underlying the parameters changing with different ratio between length and radius. These parameters consist of the form of debris cloud,axial location of debris clouds,radial extension of debris cloud and tip particle velocity of debris clouds which,with the same mass and velocity,are created by the hypervelocity impact on thin plates by cylindrical projectiles with different ratio between length and radius. The results show that the degree to which projectiles are fragmented and debris clouds disperse is conditioned by the velocity of the projectiles. The increased ratio between length and radius of projectiles triggers a greater damage by the debris clouds to the wall of spacecraft and a smaller damage to thin plates by projectiles. The result may provide reference for risk assessment of hypervelocity impact on spacecraft and design of shielding structure.