复合材料纤维张力缠绕预应力场动态特性

复合材料纤维张力缠绕技术通过提高纤维的张力水平可充分发挥纤维高强、高模优势，在成型过程中对结构进行预紧，成为解决高速转动部件径向变形大、界面强度低等问题新的有效途径。将每一层纤维的张力缠绕等效为一个含预应力复合材料薄环的叠加，基于正交各向异性复合材料缠绕层和各向同性金属芯模弹性变形理论，建立了纤维张力缠绕力学解析模型，得到芯模和缠绕层预应力场随缠绕层数及缠绕张力的变化规律，并通过复合材料纤维张力工艺试验验证了力学解析模型的正确性。研究发现了纤维张力缠绕中预应力“饱和”现象，并确定了影响张力缠绕预应力场的两个主要参数：缠绕层环径向刚度比E_θ/E_r和张力大小T（r），为复合材料纤维张力缠绕成型工艺提供理论支撑。

Pre-stress dynamic performance during filament winding with tension

The Filament winding with tension (force winding) can be used for superimposing a compressive radial stress field onto the tensile field caused by high-speed rotation to prevent radial delamination and unmatched deformation. The fiber winding process is assumed as continuous superposition of pre-tensioned composite thin rings, and the mechanical model of force filament winding is proposed on the basis of anisotropic composite elastic theory and isotropic thick-walled cylinder elastic theory. The radial and circumferential stresses of winding layers and the deformations of mandrel with winding layer number were obtained. The mechanical analytical model was verified by the test. The stress saturation is found in the high tension filament winding by the test and also proved by the analytical solutions. The two relevant key parameters for stress distribution in the force winding, the ratio of hoop stiffness to radial stiffness E_θ/E_r and the fiber tension T(r) are identified and discussed. The present and analysis approaches are critical to the successful design, analysis and implementation of filament force winding.