ピンホール式引抜き試験による樹脂繊維界面剥離挙動の実験的分析

抄録

In this study, we measured the interfacial shear strength between a thermoplastic resin and a carbon fiber by a novel pinhole-type pull-out method. In this method, the specimen had a pinhole formed on a thin metal plate filled with a resin. A fiber was embedded into the resin and pulled out from the pinhole. Seven types of polymers were used as the resin, including PP, Modified PP, PA6, PA12, PC, PMMA and PEEK. In this method, the resin shape is determined by the pinhole geometry and is always cylindrical. This method can be used to measure the frictional force between the fiber and resin after the occurrence of debonding at the interface. As a hypothesis, we defined the total pull-out load as a sum of the frictional and bonding components in the load. Herein, we separated the frictional and bonding forces from the total pulling load. Then, the bonding strength component was compared with the Mises shear yield stress of the resin. As a result, the bonding strength component measured by this method agreed with the Mises shear yield stress values of the resin.