Experimental Study about the Influence of Adhesive Stiffness to the Bonding Strengths of Adhesives for Ceramic/Metal Targets

Abstract

Modern lightweight armor systems consist of different classes of materials. The use of adhesives is a common technique to combine the armor components. The knowledge of the adhesive influence on the behavior of the armor compound is important for armor design. To study this influence four different adhesives (high-strength till high-flexible) were studied. Two types of ballistic experiments were utilized to generate different loading conditions. With 7.62 mm armor piercing projectiles with an impact velocity of 940 m/s complete penetration of adhesively bonded 12 mm thick alumina aluminum targets occurred. In contrast targets consisting of alumina and steel showed no penetration of 7.62 round ball at 840 m/s. The elongation of the adhesive layer and the deformation of metallic backing and ceramic tiles were observed by means of a highspeed camera during the projectile/target interaction.