Research On MCA Method And Penetration Process Of Projectile Into Concrete Targets

The damage and failure processes of concrete materials under dynamic loading, such as impact and penetration, were researched with Movable Cellule Automata (MCA) Method. MCA method is a powerful method proposed to deal with the non-continuum mechanics problem.Based on the mesocharacters of heterogeneous materials and the particle kinematics basic theory, the basic dynamic equations of the movable cellular automata (MCA) method for highly penetration were established. The three failure criteria, for example the displacement, stress, and volume strain, were applied to simulate the material damage. The failure processes of concrete materials under uniaxial compression and the penetrations of projectile with different impact velocity into concrete targets were simulated by MCA method. The calculation results of the MCA method were compared with the empirical formulas and Dytran, the results show that MCA method is reliability.By using MCA method, the hugoniot data for concrete material were obtained successfully at high rate and pressure; the practical high pressure equation of state was achieved for concrete material with the hugoniot data.The similarity between prototype and model experiments was analyzed by using dimension analysis method and similarity theory. The result show that the penetration depth accord with geometrical similarity for impact velocity at low 1000m/s if prototype and model were built up in same material, and they were similar in geometry.The experiment of projectile into concrete targets was carried out. The importance results for the engineering were obtained. The results of the experiment describe that MCA method is valuable for the simulation of these problems.