Influence of Tile Geometry on the Dynamic Fracture of Silicon Carbide (SiC)

Report No. ARL-TR-6861
Authors: Jacqueline T. Le; Shane D. Bartus
Date/Pages: April 2014; 28 pages
Abstract: Ceramic materials have been investigated for use in armor systems for over 40 years. The purpose of this study is to see how different sized ceramic tiles react when struck by a projectile. This study examined the response of 19-mm-thick silicon carbide-X1 (SiC-X1) ceramic tiles that were bonded to 12.7-mm-thick polycarbonate and impacted by 12.7-mm-diameter tungsten carbide (WC) spheres. Three different sized SiC-X1 hexagonal tiles were used: 50-mm flat-to-flat, 75-mm flat-to-flat, and 100-mm flat-to-flat. A light gas gun was used to propel the spheres at a nominal velocity of 440 m/s-1. A high-speed camera was set up to record the back surface of the ceramic and Image-Pro Plus 6.3 was used to analyze the footage from the high-speed camera and quantify failure and fracture of the ceramic as a function of the tile geometry. The 75- and 50-mm flat-to-flat tiles exhibited a 42% and 205% increase in crack density, respectively, over the 100-mm flat-to-flat hexagonal tile baseline.
Distribution: Approved for public release
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Last Update / Reviewed: April 1, 2014