525 大気暴露におけるCFRP材の耐候性強度とその劣化機構(高分子/高分子基複合材料(2),ものづくりにおける基礎研究と先端技術の融合)

概要

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The present paper discusses the degradation mechanism for weatherability flexural properties of CFRP subjected to the steady load and unload of the accelerated and the outdoor exposures. One of the specimens is made of epoxy resin and unidirectional carbon fiber prepregs having the fiber orientation angles of 0 and 90 degree, respectively and another specimen is made of the same epoxy resin only as the matrix of the prepregs. In order to clarify the effects of exposure period on the variations of flexural strengths and moduli, matrix volume fractions, thickness and absorption rate of infrared rays, the complex accelerated exposure test was conducted to continue for up 100 cycles and a direct outdoor exposure has been also conducted to continue for 13 years. It is shown that both the weatherability flexural strength can be calculated by the results of epoxy resin and thickness change of CFRP during the exposures, and these calculations are agreed with the experimental ones under the accelerated and the outdoor exposures.
2010-11-27