NUMERICAL SIMULATION ON THE KINETIC ENERGY PENETRATION AGAINST PLAIN CONCRETE PANEL
动能弹侵彻素混凝土板的数值模拟

The BPM2D (Beam-Particle Model in Two Dimensions) is used to simulate the penetration and perforation of a plain concrete panel. The BPM2D is based on the DEM and the FEM. Three types of beam in the BPM2D are used in the numerical model of concrete, with their mechanical properties varying with their strain-rate and are randomly assigned according to Weibull distribution to reflect the initial heterogeneity of concrete at the mesoscale level. The failure process of a steel bullet perforating into a concrete panel is analyzed by this model. The velocity field in concrete and bullet at different impact velocities are obtained. The comparison of the simulated results with the experimental data and the simulated results of the code LS-DYNA3D shows that the BPM2D can be used to simulate the dynamic failure problems of brittle material.