Tile Size Dependency of Ballistic Performance in Alumina

, 송휴섭; , S.J. Bless; , 장성도; , 송휴섭; , S.J. Bless; , 장성도

J. Korean Ceram. Soc. > Volume 32(3); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(3): 366.

알루미나의 시편크기가 방탄거동에 미치는 영향

Tile Size Dependency of Ballistic Performance in Alumina

송휴섭 , S.J. Bless ¹, 장성도

한국과학기술연구원 세라믹 공정 센터
¹IAT. U. of Texas

ABSTRACT

The ballistic efficiency of alumina tiles with various sizes, shapes, and target configurations was measured by the thick backing plate technique. The ballistic efficiency of square tiles roughly 8 mm thick struck by 12.7mm diameter bullets rapidly increased with tile size up to about 100mm, then tended to saturate. Circular shape tiles had lower ballistic efficiencies than those of square shape tiles for the same width and thickness. Small tiles (50mm) that were recessed in aluminum wells had a significantly higher ballistic efficiency than tiles placed on a flat surface. However, the difference in the ballistic efficiency between the two target configurtions became small at larger tile sizes. All the results could be explained by the effect of reflected waves at edges and the propagation of resulting cracks on the penetration process.

Key words: Ballistic efficiency, Alumina, Tile size, Thick backing plate technique, Reflected wave