고속 충격을 받는 Carbon/Epoxy 복합재 적층판의 흡수 에너지 예측에 대한 실험적 고찰

Abstract

ABSTRACT: The evaluation and prediction for the absorbed energy, residual velocity, and impact damage are the keythings to characterize the impact behavior of composite laminated panel subjected to high-velocity impact. In thispaper, the method to predict the residual velocity and the absorbed energy of Carbon/Epoxy laminated panelsubjected to high velocity impact are proposed and examined by using quasi-static perforation test and high-velocityimpact test. Total absorbed energy of specimen due to the high-velocity impact can be grouped with static energy andkinetic energy. The static energy are consisted of energy due to the failure of the fiber and matrix and static elasticenergy, which are related to the quasi-static perforation energy. The kinetic energy are consisted of kinetic energy ofmoving part of specimen, which are modelled by three modified kinetic model. The high-velocity impact test wereconducted by using air gun impact facility and compared with the predicted values. The damage area of specimenwere examined by C-scan image. In the high initial impact velocity above the ballistic limit, both the static energy andthe kinetic energy are known to be the major contribution of the total absorbed energy. 초록