Abstract:
Ballistic limit is a speed limit where projectile with a certain shape, angle of attack and size
is not able to perforate a target with certain properties and thickness. This paper aims is to
determine and analyze the ballistic limit of commercial medium carbon steel plate which has been
hardened by induction heating by using finite element based simulation. A plate with a thickness of 8
mm was shot by a deformable blunt projectile with a diameter of 20 mm, a length of 80 mm and a
mass of 0.197 kg with an angle of attack of 90° against the plate. Simulation results show that
projectile with a speed of 225 m s-1 is still able to penetrate the plate in the form of plugging. The
plate can withstand the projectile rate at a maximum speed of 215 m -1. At this speed, the plate is
damaged but the projectile does not penetrate. The plate still has ductility properties, as during the
simulation there were deflection and bulge in the back side.
