Numerical simulation analysis of the high-speed impact of the flying piece against the target based on LS-DYNA

Abstract Kinetic impact is an effective method for addressing threatening asteroids. Analyzing the cratering effect on the target during the impact process is critical for evaluating the effectiveness of kinetic impact. This paper is based on the LS-DYNA finite element analysis software and the Smooth Particle Hydrodynamics (SPH) method to establish a finite element model of the high-speed impact of a flying piece against a concrete target. The parameters such as ejecta morphology, stress distribution, and velocity changes during the impact process are obtained. The final velocity of the granite target is about 0.151m/s. A comparative analysis was conducted with the high-speed impact experiment conducted on the ground. The target velocity obtained from the ground experiment was 0.16m/s with an error of 5.6%, which can provide some reference for the actual ground-scaled high-speed impact experiment.