Three dimensional numerical simulation on projectile penetrating concrete

The projectile penetration has been transformed from low speed penetration (<900 m/s) to the high speed penetration (1200~1700 m/s) with the development of technology. This transformation will significantly affect the ballistic instability and could lead to the destruction and the failure of the projectile. The process of projectile penetrating concrete involves high pressure, high strain rate, large deformation and other extreme conditions. The three-dimensional numerical simulation of the projectile penetration concrete needs to deal with the problems of large deformation, multi-materials and all kinds of strong discontinuity. To solve the numerical simulation difficulty of three-dimensional impact problem, the Euler type parallel algorithm was proposed and the high performance simulation software was designed of three-dimensional explosion and impact problem (Explosion-3D). The shape of projectile penetrating concrete at high speed was studied with the software using 45# steel as the material of projectile and the projectile of wear and tear was described by dealing the mixed grid. The simulation results show that the mass of projectile head will change seriously and the penetration depth will decrease for the ordinary materials such as 45# steel.