Accession Number : ADA600350


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


Descriptive Note : Final rept. for period ending Aug 2012


Corporate Author : GEORGE WASHINGTON UNIV WASHINGTON DC


Personal Author(s) : Le, Jacqueline T ; Bartus, Shane D


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a600350.pdf


Report Date : Mar 2014


Pagination or Media Count : 28


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.


Descriptors :   *BALLISTICS , *CERAMIC MATERIALS , *PROJECTILES , *SILICON CARBIDES , *TILES , ARMOR , BONDED JOINTS , DAMAGE ASSESSMENT , FRACTURE(MECHANICS) , GEOMETRY , HIGH SPEED CAMERAS , IMPACT STRENGTH , LIGHT GAS GUNS , POLYCARBONATES , THICKNESS , TUNGSTEN CARBIDES , VELOCITY


Subject Categories : Inorganic Chemistry
      Ceramics, Refractories and Glass
      Ballistics


Distribution Statement : APPROVED FOR PUBLIC RELEASE