A study on fatigue life of Al 7075/CFRP multilayered hybrid composite materials

J. Ocean Eng. Technol. 1996;10(4):92-102.

Al 7075/CFRP 다적층 하이브리드 복합재료의 피로수명에 대한 연구

윤한기,김연겸,박준수,이경봉

동의대학교 기계설계학과,동의대학교 기계설계학과,동의대학교 기계설계학과,동의대학교 기계설계학과

Keywords: AI/CFRP multilayered hybrid composite, CFRP volume fraction, Fiber orientation, Fatigue life, Failure mechanism

핵심용어: 알루미늄/복합재료 다적층 하이브리드 복합재료, CFRP 채적률, 섬유배열방향, 피로수명, 파손기구

Abstract

In this research, to develope the A1 7075/CFRP multilayered hybrid composites, CRALL(Carbon Reinforced aluminum lamiate) specimens were processed by autoclavecuring system that curing temperature, time, surface pretreatment condition of aluminum were constant. Andthe fatigye life and failure mechanism on CFRP volume fraction and fiber orientation of CRALLspecimens were investigated. A fatigue life was greatly influenced by effect of CFRP fiber volume fraction but it was less effected than those of fiber orientation. The fatigue failure arised from interface delamination of CFRP and aluminum sheet after shear fracture of aluminum layer. The failure mechanism is assumed that the aluminum laminates which divide the CFRP into many thim layers tend to arrest the failure propagation.