DefinePK

Abstract

This paper evaluates the protection performance of the steel plates made of Armox560T, Hardox 400 and Weldox 700E which are used in armored vehicles. The steel plates monolayer 12 mm , double-layered 2×6 mm, triple-layered 3×4 mm and triple layered 3×4 mm with spacing 5mm between them were impacted by a 7.62 mm APM2 projectile in the initial velocity 830 m/s in all tests. The effect of the combination of different steel materials in a double- and triple-layered model on the resistance to projectile penetration was also analyzed. Numerical three-dimensional nonlinear finite element models were developed using the explicit finite element code LS-DYNA. The main results of calculations include the residual velocity of the projectile after penetrating and the pattern of the plate failure mechanism for each model. It was found that double-layered plates made of the same steel material have a worse ballistic protection performance than that of monolayer plates, and a better than that of triple-layered plates whether with or without spacing.