308 平織りガラス繊維強化複合材料の機械的特性に及ぼすポストキュアの影響

抄録

In this paper, the effects of post-cure on mechanical properties of plain woven glass fabric composites are investigated by means of the tensile test. The post-cure of composites was carried out in order to the post-cure duration at the constant temperature; 80℃ for 4,8,12,16,24h and non post-cure. It is found from the experimental results that the tensile strength and Young's modulus increased due to the post-cure. The stress-strain relation of post-cured specimen becomes linear due to increasing the adhesive strength of the fiber-matrix interface. It is clarified that the knee point stress of non post-cured specimen was higher than that of post-cured specimen. Transverse cracks are observed by the optical microscope to reveal the effect of post-cure on fracture behavior. It is found that transverse cracking in post-cured specimens initiate at higher strains than the strains in non post-cured specimen.