全缠绕碳纤维树脂基复合材料方杆的工艺研究

Processing of Fully-Wrapped Carbon Fiber Resin-Based Composite Square Tubes

传统的碳纤维复合材料方杆成型是采用预浸料铺层加缠绕方式,为改善其工艺性,采用小角度缠绕实现全缠绕的方式代替传统方法成型。通过全缠绕制备方杆的工艺方法和辅助工装设计,测试了全缠绕法和传统方法制备的方杆的力学性能。工艺研究表明:全缠绕的方杆力学性能和离散系数均优于传统方法的方杆,特别是采用4°缠绕的方杆拉伸强度和模量分别为899.74 MPa和235.22 GPa,弯曲强度和模量分别为823.57 MPa和220.22 GPa,离散系数为2.8%,是代替0°铺层的最佳选择。

Filament winding is traditionally applied together with prepreg layer to prepared the square tube of the carbon fiber reinforced composite. To improve the manufacturability,fully-wrapped process based on the small angle filament winding was studied in this paper. This work introduced the winding process and the design of the auxiliary frock. The mechanical properties of the prepared tubes by two above methods were measured. The results showed that both the mechanical properties and the Cvvalue of fully-wrapped composite are better than the traditional method. Especially,for the fully-wrapped composites with 4 °,the tensile strength and modulus are 899. 74 MPa and 235. 22 GPa,respectively; the flexural strength and modulus are 823. 57 MPa and 220. 22 GPa,respectively; and the Cvvalue is 2. 8 %. The 4 ° filament winding is the best choice to replace 0 ° overlay.