A new algorithm for simulating penetration problem of concrete plate

To study the mechanism of penetration into concrete target,based on the modified Youngs interface method,the numerical simulation results of the conical nose rod projectile penetrating uprightly into concrete target were obtained.The peak pressure of shock waves at the top of the projectile,at the reverse side of concrete target,beside the projectile in concrete target and at a great distance from the projectile decrease from maximum to minimum respectively.The penetration produced compressive damage effect to the axial concrete and extrusion one to the radial concrete.With the process of penetrating,the nose of the projectile and edge of the hole in concrete target separate and then the concrete target was penetrated through,and the cupola at the reverse side of concrete target begin to collapse.The destruction model for the conical nose projectile was a stabbing one.These agree with the experimental phenomena and the principle of physics.It also indicates that the algorithm and the code presented above are correct,which provide a direct theoretic basis for improving the engineering designs.