Finite Element Simulation Analysis of Aluminum Honeycomb Sandwich Plate Penetration of Aircraft Under High-Speed Bird Impact

Abstract

In the process of flight, the penetration caused by bird strikes will cause a significant decrease in the bearing capacity of the material, or even complete loss, which will lead to the accident of the aircraft. Therefore, it is of great significance to study the mechanical properties of aluminum honeycomb sandwich panels at different angles of high-speed bird impact. In this paper, finite element software is used to numerically analyze the penetration process. In this paper, the impact test of the aluminum honeycomb sandwich panel was carried out at 90°, 75°, 60° and 45° at the speed of 170m/s by using 1.8kg birdshot. Through finite element simulation analysis of the damage process, contact force and energy absorption rate of the aluminum honeycomb sandwich panel, it is found that when the bird projectile penetrates the aluminum honeycomb sandwich plate, the aluminum honeycomb sandwich in the impact center will be seriously deformed, torn and penetrated and failed. The angle of bird impact has a great influence on the peak contact force and the decay rate of contact force, the energy absorption effect increases exponentially with the decrease of the angle.