Design optimization on torsion property of carbon-fiber composite drive shaft

Finite element methods are employed to analyze the effects of layer angle，thickness，sequence and symmetry on torsion-properties of carbon fiber composite drive shafts. The analysis results show that the anti-torsion section coefficient is higher with the layer angles of near 0°，45° and near 90°，and increases with increasing the ply thickness；the better torsional stiffness can be obtained when the angle is between 40° and 70°. The anti-torsion property is improved by inserting a ply with an angle of 45° between the layers near 0° and near 90°，and it is better to be tacked in symmetric schemes than in anti-symmetric ones. The optimized ply stacking scheme has been used in the design of a certain type fan drive shaft and the torsion test indicates that this scheme satisfies the requirements for use and saves material .