One of the main advantages of the filament winding (FW) process is the optimized fiber deposition, even though it is limited by the kinematics of the process and mandrel geometry. The determination of the optimum fiber path is a key challenge in the design of the FW process. In this work, the fiber path for composite nozzles is determined to seek the improvement of specific mechanical properties. The path determination follows differential geometry definitions and the shell internal stresses are calculated via both netting analysis and classical lamination theory. Both geodesic and non-geodesic fiber paths are considered. Obtained results show that the wound nozzle with a non-geodesic trajectory increases the ratio between the stress in the fiber direction and both shear stress and the one acting in the parallel direction, improving its mechanical performance with respect to the Tsai-Wu failure criterion. Moreover, the closer the trajectory is to the obtained by the netting analysis, the better when considering the aforementioned criterion.

长丝缠绕（FW）工艺的主要优点之一是优化了纤维沉积，尽管它受到该工艺的运动学和心轴几何形状的限制。确定最佳光纤路径是FW工艺设计中的关键挑战。在这项工作中，确定了复合喷嘴的纤维路径，以寻求特定机械性能的改进。路径确定遵循微分几何定义，并通过网分析和经典叠层理论计算壳体内部应力。测地线和非测地光纤路径均被考虑。获得的结果表明，具有非大地轨迹的缠绕喷嘴会增加纤维方向上的应力与剪切应力和平行方向上的剪切应力之间的比率，相对于Tsai-Wu破坏准则，改善了其机械性能。此外，当考虑上述标准时，轨迹越接近通过网状分析获得的轨迹，越好。