Numerical and analytical investigation of the penetration of rigid long rod projectile in steel targets

The rapid advancement of marine science and military technology in the field of production of offensive weapons by developed countries and the ability of other countries to keep step with the issue of defense by developed countries has received serious attention. The use of impact absorbers in ship bodies, ship body reinforcement against bullets, military vehicle bumper, nuclear reactors retrofitting against aircraft and missile collisions are some of the applications of impact mechanics. The ballistic penetration performance of a projectile with kinetic energy will be more affected by the deformation of the projectile during the impact process; Among the effective factors of structural behavior against projectile penetration are their density and resistance; As these characteristics increase, so does the resistance to penetration. In this paper, using the modified theory of Bernoulli equation and expansion of the spherical cavity expansion in the target, the axial momentum equation, the analytical model of Walker and Anderson penetration are presented. The aimed analytical model, according to the available hypotheses, agrees quite well with different experimental values.