부산대학교 도서관

This study concentrates on the effect of hybridisation on the safety performance of lightweight vehicular members for the use of impact absorption. the recent trend in vehicular design is aimed at improving both the environment-friendly quality and collision safety requirements for the vehicles. For the former, the trend is toward light-weight of vehicles to improve fuel efficiency and reduce tail gas emission due to the heavier restriction on exhaust levels. For the latter, however, the trend is toward higher safety performance, comfort level, high-efficiency and multi-functional programs with all increase the weight demands. Therefore, the light weight of vehicle must be achieved in a status of securing safety of collision. In this study, the lightweight vehicular members of impact absorption were made of aluminum and composite materials, which are representative light-weight materials. Those members were analyzed by collapse characteristics under axial loading. The axial collapse tests were performed for circular members which is basic shape of vehicle structural members. Eight different hybrids hand lay-up circular composite members containing CFRP, GFRP and Al were manufactured. Experimental investigations are carried out for eight types of composites, namely, CCC, CCG, CGC, CGG, GGG, GGC, GCG and GCC. Failure modes were examined using the photographs taken during the different crushing stages for each specimen. Failure modes were highly effect by the material sequence of CFRP and GFRP. The results also showed that energy absorption characteristics were effect by the material sequence of CFRP and GFRP. When the position of GFRP is in the inside or middle, specimens will have the best energy absorption characteristics.