2754 水環境下におけるFRPの繊維強度低下(S17-2 複合材料(2),S17 複合材料の動向とその加工技術)

概要

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Long-term durability of fiber reinforced plastics (FRP) under hostile environment is strongly influenced by the degradation in the fiber strength. The degradation of the fiber strength has been quantified on the basis of stress corrosion cracking (SCC) of the initial defects on the fiber surface. In this paper, the strength degradation of the embedded fibers under constant loading in water environment has been investigated using the single fiber composite (SFC). Creep test was conducted under water environment using the SFC specimen, to represent the stress corrosion cracking of GFRP. By taking account of the strain concurrent with the water absorption, creep strain, and the thermal expansion, the strain history of the fiber was formulated. From the strain history, the remaining strength distribution was measured by the fragmentation test. The model containing the Paris Law and the Arrhenius model has been developed to predict the remaining strength of fiber embedded in FRP.
一般社団法人日本機械学会の論文
2007-09-07