Experimental and Numerical Analysis of Conical Projectile Impact on Inconel 718 Plates

This article belongs to the Special Issue Metallic Materials under Dynamic LoadingThis paper analyses the impact behavior of Inconel 718 through experimental and numerical approach. Different conical projectiles were tested in order to obtain the ballistic curves and failure mechanisms. A three-dimensional (3D) numerical model corresponding to the experimental tests was developed using the Johnson&-Cook constitutive model. The experimental data (residual velocities, global, and local perforation mechanisms) were successfully predicted with the numerical simulations. The influence of the projectile's nose angle was found to be important when designing ballistic protections. The projectile with the narrowest angle, 40°, developed a ballistic limit approximately 10 m/s lower than the projectile with a 72° nose. The use of double-nose projectile for the same nose angle, 72°, led to a ballistic limit 12 m/s lower than that obtained for the single nose.This research was funded by the Ministry of Economy, Industry and Competitiveness and the FEDER program, grant number DPI2014-56137-C2-2-R. The researchers are indebted to the FEDER/Ministerio de Ciencia, Innovación y Universidades de España (Project DPI2014-56137-C2-2-R) for the financial support which permitted to conduct part of this work