Change of Interfacial properties by the Fiber Degradation in the Fiber Reinforced Composites

J. Ocean Eng. Technol. 1998;12(3):31-41.

Moon, Chang-Kwon;Kim, Young-Dae;Roh, Tae-Young;

섬유강화 복합재료에서 섬유열화에 따른 계면특성의 변화

문창권;김영대;노태영;

부경대학교 공과대학 재료공학과;부경대학교 공과대학 기계자동차공학부;부경대학교 공과대학 기계자동차공학부;

Keywords: Fragmentation Test, Degradation, Interfacial Shear Strength, Durability

핵심용어: 프래그멘테이션 시험, 열화, 게면전단강도, 내구성

Abstract

Single fiber fragmentation technique was used to evaluate the change of interfacial properties by degradation of fiber tensile strength in the fiber reinforced composites. The influences of fiber tensile strength on the interfacial properties have been evaluated by the fragmentation specimens(weak fiber samples) of glass fiber/epoxy resin that was made using the pre-degraded glass fiber in distilled water at $80^{circ}C$ for specified periods. The effects of the immersion time on the interfacial properties in the distilled water at $80^{circ}C$ also have been evaluated by the fragmentation specimens(original fiber samples) of glass fiber/epoxy resin that was made using the received glass fiber. As the result, the tensile strength of glass fiber was decreased with the increasing of the treatment time in the distilled water at $80^{circ}C$ and the interfacial shear strength was independent of the change of the glass fiber strength in the single fiber fragmentation test. But in the durability test using the single fiber fragmentation specimen, interfacial shear strength decreased with the increasing of the immersion time in distilled water ar $80^{circ}C$. And it turned out that the evaluating of interfacial shear strength using original fiber tensile strength was valuable in the durability test for the water environment by the single fiber fragmentation technique.