Abstract
In recent years, the damage to the vital structures such as nuclear power facilities by tornado-born missiles has been concerned because tornadoes have frequently occurred in Japan. Although a steel plate usually shows ductile elongation under low velocity impact by absorbing an impact energy, few studies have conducted an impact phenomenon with the estimated velocity of approximately 50m/s for the tornado-born missile. This study investigated a fundamental study on the perforation of SS400 steel plates by conducting impact tests and numerical simulations. As a result of the impact test, a 4.3kg-mass projectile yielded a perforation hole in 6mm-9mm-thick steel plates at an impact velocity of 57m/s. Numerical results reproduced the local deformation of the steel plates and impact velocity time history of the steel projectile.
