تغيير شكل پرتابه هاي تخت حين فرايند برخورد و نفوذ به اهداف فلزي تغيير شكل پذير نيمه ضخيم

Deformation of Blunt Projectiles during Penetration into Deformable Medium Metallic Targets

In this paper, deformation of blunt projectiles is studied for normal penetration into a deformable medium metallic target, by using of plastic wave propagation in the projectile and plug. The new analytical approach presented in this investigation, is established based on the concept of the conservation energy across the plastic wavefront in the projectile and plug, during penetration process. This model assumes that the projectile and plate materials are rigid-linearly strain-hardening and rigid-perfectly plastic respectively. In this method, by merging the equation of energy equilibrium in the projectile and plug with the equation of mass conservation of the projectile, an equation is obtained that cross section of the deformed part of the projectile are calculated by solving it with numerical methods ,such as Muller method. The theoretical results have compared to the experimental ones and found to be in good agreement.