A study on characteristic adgesive condition at microscopic interfaces and notch shape strength of GFRP composites laminates under low-hot-wet environment

J. Ocean Eng. Technol. 1996;10(4):58-66.

저온.고온고습 환경시험에 의한 GFRP의 미시계면 접착상태 및 노치형상강도 특성에 관한 연구

김옥만,박귀성,한길영,이동기,김이곤

조선대학교 대학원,조선대학교 대학원,조선대학교 공과대학 수송기계부품 공장자동화 연구센터,조선대학교 공과대학 수송기계부품 공장자동화 연구센터,국민대학교 정밀정형 및 금형가공센터

Keywords: Thermoplastic Resin, Continuous Fiber Reinforced Composite, Adhesive Condition, High Viscosity

핵심용어: 열가소성 수지, 연속섬유강화 복합재료, 접착상태, 고점성

Abstract

The purpose of this investigation is to estimate the strength with the variations of the notch shape and the adgesive condition at the fiber/matrix micro interface of E-glass/PP laminates. To promote the degradation of the adhesive condition at the fiber/matrix micro interface without matrix dissolution loss, low-, hot-wet and spiking tests were carried out. The absorpotion properties and the tensile properties were compared accrding to the fiber orientation and the content. The results show that, firstly, saturated moisture absorption was reached at 5cycles and their absorptions of RD-40, UD-42 and UD-50 are 0.68%, 0.63%, 0.60%, respectively. Secondly, all the specimens investigated were mostly degraded at 5cycle, whereas UD-50 having ellipse shaped notch the least decrement of strength.