水環境下におけるガラス繊維の劣化 : 表面状態変化の強度低下に及ぼす影響(FRPの疲労・環境破壊,OS.14 先進材料の力学)

概要

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Effects of surface state of an E-glass fiber on degradation were investigated in this study. The E-glass fiber has some microscopic cracks and there is coupling agent to cover the surface. The degradation by water depends on both of them. Therefore the degradation of the E-glass fiber was evaluated by mechanical tests and chemical analyses. First of all, the E-glass fiber bundle strength was evaluated as a function of immersion times in water it was found that the strength decreased but eventually the decrease was saturated. The chemical analyses by XPS showed that the state of the surface coating changed due to water corrosion. Because the XPS Si peak on both of the glass surface and the coupling-agent decreased after immersion in water. Next, delayed fracture of the E-glass fiber was evaluated in water. Lifetime of E-glass single fiber decreased depending on the applied stress. Finally, we discussed the relationship between Si peak distribution and E-glass fiber delayed fracture.
一般社団法人日本機械学会の論文
2004-03-03