Author(s)

H. Sakamoto, T. Hiwatashi, T. Yamaguchi & M. Yamamoto

Abstract

In this research, the bullet-firing test was carried out at different velocities and collision angles of the bullet. The influence of its velocity and angle on the deformation shape after firing was discussed by comparison with experiment and simulation. The velocity of the bullet was chosen in several kinds of speed ranges at 80m/s–250m/s. As for the angle of incidence with the collision object, four kinds of angles 90° (head-on collision), 45°, 30° and 60° were set. The deformation shape was measured by a 3D coordinate measurement machine and reconstructed with 3D-CAD based on the 3D digital data. The bullet hole and deformation of the polycarbonate board caused by the bullet's collision with the object was also examined. In addition, the collision simulation of the bullet was carried out using LS-DYNA, and these analytical results were compared with the 3D digital data of the bullet. The comparison of the FE-simulation analysis results of the experiment enabled the quantitative evaluation of the collision deformation. Keywords: collision, bullet, deformation analysis, LS-DYNA, 3D-CAD. 1 Introduction Gun crime has been increasing year on year. Collecting the bullet after firing is needed to solve these affairs [1]. It is often that a bullet is the only evidence in the affair. Therefore, studies about a bullet deformed by a collision are very

Keywords

collision, bullet, deformation analysis, LS-DYNA, 3D-CAD.