Environmental creep test for F glass and C glass reinforced plastics were performed. Acoustic emission technique was used to detect the fracture propagation in this study. As a result, it was indicated that the durability of GFRP depended on the types of glass fiber. C glass reinforced plastic had much longer lifetime than E glass one. Furthermore, it was cleared that the fracture behaviors of both were different. Acid stress corrosion was occurred in E glass specimen, and interface was damaged in C glass specimen.
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