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김영남(Youngnam Kim),황재중(Jaejung Hwang),심재기(Jaeki Sim),양인영(Inyoung Yang) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
Currently, stacking condition related to the impact energy absorption of composite materials is being considered as an issue for the structural efficiency and safety of automobiles, aerospace vehicles. trains, ships and even elevators during collision. In particular, CFRP (carbon fiber reinforced plastics) composite materials have found wide applicability because of their inherent design flexibility and improved material properties. CFRP composite tubes were manufactured from uni-direction prepreg sheet in this paper. Chamfering one edge of the composite tubes could reduce the initial peak load without altering the sustained crushing load and prevent catastrophic failure in collapse situations. We performed static and dynamic impact collapse tests using a home-made impact test machine with vertical air-compression. The paper describes the energy absorption characteristics of CFRP composite tubes as a function of interlaminar number, ply orientation angle of outer and trigger.
[안전부문] 경량화용 복합재 박육부재의 축압과 특성에 관한 연구
박민엽(Minyeop Park),황재중(Jaejung Hwang),김영남(Youngnam Kim),정종인(Jongan Jeong),임광희(Inyoung Yang) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
When CFRP(Carbon Fiber Reinforced Plastics) composite thin-walled members are subjected to axial crushing loads, the response is complex and depends on the interaction between the different mechanisms that control the crushing process. In this study, it was conducted to determine whether the energy-absorption capability of CFRP composite tubes is a function of interlaminar number and orientation angle of outer. Tubes are composed of 4 types interlaminar number(k = 2, 3, 6 and 7) and included ply orientation angle of outer was 0 and 90. The collapse characteristics and energy absorption have been examined for various tubes. The results have been varied significantly as a function of ply orientation and interlaminar number