In this study, the analysis of plate under torsion was carried out according to stacking angle at the
unidirectional carbon fiber reinforced plastic(UD CFRP) among composite materials. In case of UD CFRP,
the material property due to stacking angle becomes different. Also, the stacking angles were designated to
15°, 30°, 45°, 60°, 75° and 90° at the study models. The notch hole was applied at the center part by
supposing that rivet or hole was used. The analysis method was used by applying the experimental method
at ISO 15310. Two jigs were fixed at the lower part and two jigs were descending at the upper part. As seen by the analysis result values at this study, the shear stress happening at the fracture part was seen
with the lowest value in case of the stacking angle of 45°. It is known that the case of the stacking angle
of 45°has the structural safety and durability higher than those of the other stacking angles when the
torsion applies. It is thought that this result can be applied to the data of basis which can be devoted to
the durability when the torsion is applied at CFRP plate.