Abstract
The mechanical strength of FRP material depends on the fibers or other reinforced materials. In case of using continuous fibers for reinforcement, however, if fibers are loose or bent, fiber's property may not be reflected FRP mechanical property enough. In this study, it reports the effect of fiber condition by experiment and analyzing FRP materials whose fibers are applied initial strain formed by a hot press machine. As a result, the initial fiber strain increases the elastic modulus.