곡률을 고려한 CFRP 복합재 적층쉘의 관통특성 : 관통에 의한 파괴모드를 중심으로 = Penetration Characteristic of CFRP laminate shell by the curvature -A focus of fracture mode by the penetration-

다국어 초록 (Multilingual Abstract)

CFRP composite materials have wide application in structure materials of airplane, ships, and aero space vehicles because of their high strength and stiffness. This paper is to study the effects of curvature and orientation angle on the penetration characteristics of CFRP laminate shell. They are staked with 8 Ply specimens [0₂/90₂]<SUB>S</SUB>, [0/90₂/0]<SUB>S</SUB> and the stacked of outer plates degree with 12 Ply specimens [0₃/90₃]<SUB>S</SUB>, [0₂/90₂/0]<SUB>S</SUB> and [903/03], [902/02/90]S. They are manufactured to varied curvature radius (R=100,150,200㎜ and ∞). They are cured by heating to the appropriate harding temperature(130℃) by mean of a heater at the vaccum bag of the autoclave. Test specimens were prepared with dimensions 100㎜×140㎜. When the specimen is subjected to transverse impact by a steel ball, the velocity of the steel ball was measured both before and after impact by determining the time for it to pass two ballistic-screen sensor located a known distance apart. In general, kinetic energy after impact-kinetic energy before impact rised in all specimens. This study observed a fracture mode inside the specimen after a penetration test using a digital camera and it examined a fracture mode and a penetration mode to stack of outer orientation angle and curvature.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 연구방법
• 3. 결과 및 고찰
• 4. 결론
• 참고문헌