連続繊維マット強化CPレジン複合材の静的力学および破壊特性に及ぼす母材および繊維含有率の影響(高分子系複合材料小特集)

概要

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The purpose of the present work is to reveal the behavior of two kinds of different matrix resins in composite materials through the experimental reesults of mechanical and fracture properties and observation of macro and micro fracture surfaces. The composite specimens are made of ductile or brittle resin and continuous glass fiber mats with various fiber contents. The elastic modulus and the tensile strength of these two resins are nearly of the same values, while the elongation is different. The results obtained are as follows: (1) The tensile strength of the ductile matrix resin composites is higher by 20〜30% than that of the brittle matrix resin composites. The values of both composites with fiber content 20 wt%, however, are lower than those of the matrix resins. These results can be understood based on the observations of macro fracture processes and fracture surfaces. (2) The fracture toughness K_<in> at crack growth initiation increases with increasing fiber content for both composites. The values of K_<in> for the ductile matrix resin composites with fiber contents 0 st% and 20 wt% are higher than those of the brittle ones. For the composites with fiber contents 40 wt% and 60 wt%, the values of K_<in> for both composites scatter randomly.
1994-03-15