Mohammad Reza Meraki - Instructor, Department of Materials, Birjand University of Technology, Birjand, Iran
Mona Ashraf Hedayati - PhD student, Department of Materials, Azad University South Tehran Branch, Tehran, Iran

In this study, the finite element method was used to simulate a three-layer sandwich structure. The numerical results are in good agreement with the experimental results. The results of finite element analysis for different speeds were investigated and shown. By increasing thespeed of the bullet and increasing its energy, the rate of degradation is increased and at high speeds the bullet can penetrate the structure by overcoming the top surface of the structure and by crossing the copper layer and causing the surface to become obscured. Important pointin all impacts is to increase the structural rigidity until the stress value reaches its maximum

Sandwich Structures, Copper/Aluminum/Copper, Finite Element Method