| Due to the continuous progress of modern weapons, many important military targets on the ground are moved into the underground to avoid artillery attacks, so the penetrators which are good at attacking the underground targets got developments. During the high speed penetration, projectile mass erosion and head shape passivation would have direct effects to the damage effect and penetration performance. Based on the Eulerian dynamics simulation software EXPLOSION-2D, the HJC constitutive model of concrete and mass loss model of projectile are implanted into the calculation program MMIC-2D and the particle mapping method is used to control transport calculation instead of particle in cell method, the processes of projectiles normally penetrating the concrete target are numerically simulated. The results of numerical simulation are compared with related experimental data, and factors affecting the penetration effect are studied. The main research contents are as follows:(1) The main calculation program MMIC-2D is deeply studied, and the particle in cell method is instead by particle mapping method, then numerical wave in the result from particle in cell method is overcome and the Euler transport is accurately calculated and the multi-material interface is clearly distinguished;(2)The HJC constitutive equation of concrete is implanted, and the damage accumulation algorithm is given to describe the damage of concrete. Considering the mass loss is come from the melting material on the projectile surface, the mass loss model is also implanted into the program;(3)The processes of projectiles normally penetrating the concrete target under different conditions are numerically simulated. The depth of penetration, mass loss of projectiles and the damage of concrete target are studied. The results are compared with related experimental data, validity and reliability of the calculation program are proved. Factors affecting the penetration effect are also studied. |
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