屋外曲げばく露負荷を受けるGFRP材の耐候性強度

概要

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Two kinds of GFRP under steady flexural load have been exposed outdoors since 1980. One of them is made of unsaturated polyester resin and chopped glass mat strands and the other is made of the same constituent materials but is covered with weatherable resin. In order to clarify the dependence of the weatherability strength on the exposure period, the four-point flexural test is used. The variations of flexural strengths, flexural moduli, fiber volume fractions and hydrolytic decomposition of polyester chains well fitted with Weibull distribution function. The relationships of these strengths to the exposure period and the effect of weatherable resin are reported in this paper. Furthermore, some cracks at the surface of specimens have been observed using an electron microscope.
社団法人日本機械学会の論文
1996-09-25