응력 기반 파손 기준식을 이용한 탄소 복합재 구조부재의 충격 압궤 해석에 대한 연구

As environmental laws become stricter throughout the world, greater attention is being paid to carbon fiber composites for use as lightweight materials because of their excellent mechanical properties, such as higher specific stiffness and strength, compared with metal materials. However, because such materials are composed of carbon fiber and epoxy resin, a complex failure mechanism caused by crack initiation and propagation arises that depends on the fiber orientation and stacking sequence. Therefore, in this paper, a drop tower test and simulation were carried out to examine the collapse behavior of structural members of CFRP(Carbon Fiber Reinforced Plastics) with different stacking sequences. Simulations were performed for each case for various collapse modes to determine the impact collapse of the carbon composite using stress-based failure criteria.