GFRP積層管のクリープ特性評価法の一考察(特集高分子系複合材料)

概要

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The purpose of the present work is to estimate the behavior of creep deformation of GFRP pipe under an internal hydraulic pressure where the both ends are free. The GFRP pipe is developed for renewal of an overage drain pipe or gas pipe. It is mainly made up of two layers where the glass fiber mat is used in the inside layer for corrosion resistance and the woven roving cloth is as the outside layer for pressure resistance. Before the internal hydraulic pressure creep test, the tensile creep tests are carried out with the dumb bell type specimen which is cut from the uncured laminated pipe and then is cured. The creep constitutive equation is obtained using the tensile creep data of short-term tests, by taking account of stress, temperature and tensile angle to reinforced glass fiber. Based on this creep constitutive equation, long-term creep be havior can be predicted. A reasonable comparison between the prediction and the tensile experiment is observed at time up to 10^6 second. The internal hydraulic pressure creep test on the pipe verified the creep constitutive equation.
社団法人日本材料学会の論文
1997-04-15