抄録
The unidirectional compressive failure of fiber reinforced plastics is dominantly influenced by plastic kinking process which starts from any initial local fiber misalignment. Compressive strength in the fiber direction is much less than tensile strength and plays a significant role for designing a robust structural member. In case of the unidirectional composite laminate, particularly compressive molded and using versatile thermoplastic resin, its compressive strength depends a great deal on initial fiber misalignment in the out-of-plane direction and the elastic-plastic behavior of the matrix. By using a compressive test specimen with a shape of hourglass, the dependence of kinking and shear property caused by initial fiber misalignment in the out-of-plane direction has been verified theoretically.
