An analytical model Presentation and experimental investigation of the penetration ‎depth of the rigid blunt projectile on the perforated metal plate

The use of perforated plates in the impact of projectiles reduces damage to the main target, the final cost of construction and surface density. The purpose of this paper is to present a new and complete analytical model to obtain the penetration depth as well as the deflection of the rigid head projectile after hitting the perforated plate. This model is based on the development of the model provided by Chen, and in the following experimentally investigation of the impact of the projectile on the perforated plate has been paid. for this purpose For this purpose, projectiles of AISI 52100 and perforated plates of AISI 1045 with 3 hole diameters of 5, 7 and 9 mm have been used. Finally, the results obtained from the analytical solution are compared with the experimental results and the accuracy of the analytical model is proved. After examining the different states of impact, it can be seen that the projectile deviates from its path after hitting the hole and changes from vertical impact to oblique impact. As the diameter of the hole or the amount of overlap of the projectile with the hole increases, the deflection of the projectile also increases.‎