ScholarWorks@한국철도기술연구원

초록

In this study, the static compressive energy absorption characteristics of three different carbon fiber/epoxy cylindrical tubes with tulip triggers were evaluated through tests. The carbon fiber/epoxy composite tubes were fabricated by hand layup using unidirectional and woven prepregs and by filament winding. In this study, one end of the tubes was processed into a tulip shape to reduce the initial peak load of the cylindrical tubes and improve the energy absorption characteristics during the compression process. The woven carbon fiber/epoxy tube showed the highest energy absorption per unit weight of 96.6 kJ/kg in the compression test, while the filament winding tube showed the lowest value. The main failure modes were lamina bundle fracture and longitudinal crack propagation between the sawtooth sections in the unidirectional and woven tubes. In the case of the filament winding tube, the compression occurred while the fiber fractures progressed continuously without forming an external frond structure.

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