216 積層グリーンコンポジットの三点曲げにおけるヤーンの変形挙動

抄録

In recent years, green composites have been attracting attention from the viewpoint of prevention of global warming. Green composites which are reinforced by continuous natural yarns are mainly formed by stampable forming. During the forming process, it is known that the continuous natural yarns can move in the matrix and the movement of yarns may affect the strength of product. In this study, the kinetic behavior of continuous yarns during thermoforming process and the effect of lamination are investigated in three-point bending test for single and double layered green composites. As a result, the kinetic behavior of yarns has an influence on the bending strength of green composite. Additionally, it is estimated that the volume fraction of yarns and the test temperature affect the kinetic behavior of yarns. Finally, it is concluded that the adequate volume fraction of yarns and the test temperature are necessary to keep and improve the strength of product.