곡률과 적층배향이 다른 CFRP 적층쉘의 내충격특성

Abstract

CFRP composite is widely used in various industries because it has excellent mechanical properties under static load conditions. In particular, the CFRP composite is widely used in the aerospace field due to its superior wear resistance and heat resistance. However, under the impact load, temperature and moisture conditions, there is a lot of decrease in strength. In this study, impact experiment were conducted using high-speed impact testing device to examine fracture and dissection of fiber and matrix generated inside the CFRP composite according to the layered composition. In order to establish the conditions of the various specimens, a specimen with the stacking conditions of orthotropic ([0°3/90°3]s) and isotropic ([+45°3/-45°3]s) was constructed. It was found that the orthogonal divergence test specimen was more than twice as likely to increase the critical tube energy than the isotropic test specimen.