The invention belongs to the technical field of helicopter structural components, and discloses a three-dimensional woven composite material tension and torsion strip structure which comprises at least two layers of three-dimensional woven tension and torsion strips, cloth liners and linings, the tension and torsion strips are overlapped and fixed through the cloth liners, connecting holes are formed in the two ends of each tension and torsion strip, and the linings are arranged in the connecting holes; wherein the tension-torsion strip is made of a composite material made by a three-dimensional weaving process, and fiber yarns are distributed in the surrounding direction different from the winding direction of the tension-torsion strip. According to the three-dimensional braided composite material tension-torsion strip structure provided by the invention, the three-dimensional braided structure can effectively improve the tension resistance and enhance the layering resistance under torsional deformation, so that the service life of the tension-torsion strip is prolonged; the typical section and the connecting section of the tension-torsion strip are transited through the slow transition area with the size from large to small, the normal warping stress of the connecting section of the tension-torsion strip can be reduced, and the normal warping stress is reduced by 20%-30% under the unit torsion angle.
本发明属于直升机结构部件技术领域,公开了一种三维编织复合材料拉扭条结构,包括至少两层三维编织的拉扭条、垫布和衬套,拉扭条之间隔着垫布重叠固定,拉扭条的两端设有连接孔,连接孔内设有衬套;其中,拉扭条使用三维编织工艺制成的复合材料制成,在不同于拉扭条的环绕方向上存在纤维纱线分布。本发明提供的三维编织复合材料拉扭条结构,三维编织的结构能够有效提升抗拉能力,增强扭转变形下抗分层能力,因此提高拉扭条使用寿命;本发明的拉扭条的典型段和连接段通过由大到小的尺寸缓慢过渡区来过渡,可以降低拉扭条连接段翘曲正应力,单位扭转角度下,其翘曲正应力下降了20%~30%。
Three-dimensional woven composite material tension-torsion strip structure
一种三维编织复合材料拉扭条结构
2023-02-28
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
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