抄録
Carbon fiber reinforced plastic (CFRP) possess high specific strength and is applied to various elements of the mechanical structure. It has been clarified that delamination and deformation occurred on a fiber composite and a laminate in CFRP, from repeatedly applying of loads. However, report on the damage characteristics of CFRP with a stress concentration zone such as groove and circle hole by combined loading of tensile and torsion have not a lot yet. In this study, we conducted cyclic combined loading examination of tensile and torsion. We paid attention to residual strain from the relationship between stress and strain, and examined the relationship of stress and the cycle of damage. As a result, it is showed that the relationship of stress and the cycle of damage is affected by the fiber orientation.
