碳纤维复合材料传动轴承扭性能优化设计

利用数值模拟分析的方法研究了铺层角度、厚度、顺序以及对称性对碳纤维复合材料传动轴抗扭性能的影响规律。研究发现结构抗扭截面系数在单向铺层方向为接近0°、45°及接近90°时较高，且随着铺层厚度增加而增大；扭转刚度则在40°～70°较好。在接近0°和接近90°铺层间铺设45°铺层能提高零件抗扭性能；与反对称铺层方案相比对称铺层方案更有利于零件承受扭矩。将优化铺层方案应用在某型号风机传动轴的设计中，试验证明能够满足使用要求并达到节约原材料的目的。

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 increasingthe 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.