Effect of Variation of the Angle Between Joined Armor Plates on Ballistic ShockAttenuation

摘要

Ballistic shock has been recognized by the vulnerability community as a damage-producing mechanism worthy of investigation. A simple straight line analysis method has been proposed and is being pursued. One factor not considered to this point is the effect of angle variation between welded plates on shock attenuation. The object of this research effort was to determine if such an effect exists, and, if so, a determination of the effect was desired. Both experimental and computational analyses were conducted in an attempt to investigate the effect of angle variation on shock attenuation. Mild steel and 5083 aluminum target plates were constructed. The angle variation in the target plates ranged from 0 deg to 120 deg, 0 deg being a flat plate. A steel ball bearing was used as an impacting device, and accelerometers were used to obtain the desired experimental data. ADINA was used for the computational portion of this effort, and all experimental conditions were analyzed via this code. As a result of this effort, it was shown that angle variation does have an effect on shock attenuation, and algorithms were developed that quantify the effect. Work in this area of interest must continue to further investigate these effects on other plate materials and different welding techniques. Additional effort could also be placed on analyzing these effects with differing impactor types. Ballistic shock, Attenuation, Armor, Welded plates, Aluminum, Mild steel, Acceleration.