6. Conclusions

Penetration of projectile into concrete target was investigated in this research by using both experimental methods and numerical simulations. A lab test system which is able to launch steel projectile into cement concrete targets was successfully built. Projectile package driven by propellant gas enables a steel projectile to penetrate into cement concrete targets at different speeds. Finite Element Method (FEM) was utilized to simulate the penetration process of projectile into a concrete target. A projectile is considered as rigid material with no deformation during the penetration process. Cement concrete targets can be modeled using a concrete damaged plasticity model. Several major effects are estimated by FEM simulation including diameter, mass and initial speed of the projectile. Additionally, numerical simulation using Discrete Element Method (DEM) was employed to simulate the penetration process of projectile into cement concrete target. A calibration method was developed to obtain microscopic parameters from macroscopic parameters of concrete. Penetration process can be modeled using the time history of the depth, initial velocity and deceleration of the projectile then compare results with empirical predictions results of previously conducted simulations.
