2012 年 12 巻 2 号 p. 94-100
The Poly (ether-ether-ketone) (PEEK) resin is a kind of super engineering thermoplastics, and has good mechanical properties and high heat resistance. Recently it has been used for the matrix of Carbon Fiber Reinforced Plastics (CFRP) as a substitute material for thermosetting plastics at high temperature because of its fine moldability. For such occasion, it is very important for reliability of these materials to reveal the visco-elastic behavior of polymer materials. In this study, linearity for creep behavior of PEEK and CFRPEEKs were discussed, and the relationship between time and temperature, fiber volume fractions and crystallinity was revealed.
Bending creep tests were performed on the crystallized PEEK resin and its CFRPs. It was found that master curves of creep compliance were obtained, and the Arrhenius type time -temperature superposition principle was applied for crystallized PEEK resin and its crystallized CFRPs. Effects of crystallinity and fiber volume fractions on creep behavior were considered by making grand master curves and great grand master curve.Great grand master curve and the shift factors for making great grand master curve were approximated with prony-series equation and quadratic expressions. Using these equations, the creep analyses were carried out. The results have a good agreement with the experimental data. And the estimation data was determined with great accuracy.
