复合材料干纤维增强回转体结构缠绕线型设计

复合材料干纤维缠绕增强结构可解决纤维缠绕树脂基复合材料结构耐冲击性差、低温环境树脂易失效等问题。干纤维增强结构缠绕过程中，纤维束重叠、压缩导致干纤维缠绕增强层各处厚度不一，会对缠绕线型稳定性产生影响。为满足缠绕线型稳定，研究了测地线干纤维缠绕增强层厚度变化及分布规律，分析了纱带宽度、极孔尺寸及芯模结构等参数对增强层厚度的影响，考虑芯模厚度的变化，逐层更新干纤维缠绕增强结构数学模型，进行了缠绕轨迹计算，获得测地线缠绕线型。缠绕实验表明：理论仿真获得的复合材料干纤维缠绕增强容器增强层厚度准确，缠绕线型稳定，无滑纱现象，验证了纤维厚度与缠绕轨迹计算方法的可行性和干纤维增强层厚度仿真的正确性。

Design of filament winding pattern for composite dry-fiber reinforced rotary structures

Composite dry-fiber wound reinforced structure could be used to solve the problems of the poor impact resistance and failure of resin under the low temperature of filament winding resin matrix composite structure. In the process of filament winding for dry-fiber reinforced structure, the overlap and compression of the fiber bundle resulting in different thicknesses of dry-fiber wound reinforced layers have an effect on the stability of the winding pattern. The variation in the thickness and distribution law of dry-fiber wound reinforced layers based geodesic were studied winding to make sure the winding pattern stable. The influence of yarn width, pore size and core structure etc on the thickness variation of the dry-fiber reinforced layers was analyzed. The mathematical model of the dry-fiber wound reinforced structure was updated one by one considering the variation of the thickness of the mould. Then the winding trajectory was calculated and the geodesic winding pattern was acquired. Finally, the winding experiment of the dry-fiber wound reinforced layers was carried out taking vessel as example. The thickness of the reinforced layers obtained by theoretical simulation is accurate. The winding pattern is stable, the phenomenon of slipping of fiber doesn't exist. The feasibility of the calculation method of fiber thickness and winding trajectory and the correctness of simulation of dry-fiber reinforced layers thickness are verified.