# 세라믹 타일이 삽입된 금속 블록의 최적 방호구조 연구

• Lee, Seunghwan (Dept. of Mechanical Engineering, Sejong Univ.) ;
• Lee, Minhyung (School of Mechanical and Aerospace Engineering, Sejong Univ.)
• 이승환 (세종대학교 기계공학과) ;
• 이민형 (세종대학교 기계항공우주공학부)
• Accepted : 2016.01.11
• Published : 2016.03.01
• 45 21

#### Abstract

A numerical simulation has been performed for the penetration of a long-rod penetrator into a metal block (ceramic-tile-inserted 4340-steel plate). The impact velocity is 1.5km/s at a normal incidence angle. The first two validations are conducted for a semi-infinite block measuring the depth of penetration (DOP). The material model of ceramic is the JH-2 (Johnson-Holmquist) model. The predicted DOP values are in close agreement with the experimental data. Then, the primary simulation is performed by varying the position of the confined ceramic tile for three types of thickness of ceramic tile. The residual velocity, residual mass and residual kinetic energy of the long-rod are obtained from the simulation. Based on these predicted values, the trend of the ballistic performance of the protective structure is estimated. In addition, the mass efficiency is calculated in order to determine the performance of the ceramic-tile-inserted metal block. Finally, the optimum protective structure is identified.

#### Keywords

DOP;Ballistic Performance;Mass Efficiency;Optimum Protective Structure

#### Acknowledgement

Supported by : 국방과학연구소

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