Thermoplastic Polyamide (PA) is known as Nylon®, and its FRP are one of the engineering plastics. It is very important for them to reveal accurately the visco-elastic behavior. Furthermore, PA is a crystalline polymer, and it is necessary to consider the effect of crystallization on mechanical properties. The purpose of this study was to make clear the effect of crystallization and fiber volume fraction on creep behavior of PA. The creep test was performed using the materials which adjusted crystallinity on each composite with various fiber volume fractions. As a result, these materials conformed to Arrhenius type of time-temperature superposition principle, and crystallinity and fiber contents work on creep behavior as not only the effect of reinforcement but also of time retardation. To compare the creep behavior on these effects, we made the grand master curves for crystallinity and fiber volume fraction. Obtained two grand master curves were compared each other, the shapes of these curves are similarly, and we tried to superpose them, and we got the great grand master curve. Therefore, the creep behavior including each conditions have the same behavior. Using these curves and shift factors, we can calculate the creep behavior, and estimate the creep behavior with the effect of arbitrary time, temperature, crystallinity and fiber contents.
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