纤维增强树脂复合材料网格结构成型工艺研究进展

Research progress of forming process of fiber reinforced polymer composite grid structure

纤维增强树脂复合材料网格结构具有高比刚度、高比强度、高损伤容限、可自动化成型等特点,在航空宇航结构中有着广阔的应用前景。纤维在网格结构交叉点处的堆积、架空、弯曲和裁剪严重影响了结构的最终性能。针对纤维增强树脂复合材料网格结构交叉点处的固有缺陷,总结了纤维缠绕、铺放、三维编织、互锁、真空辅助树脂传递模塑等工艺在纤维增强树脂复合材料网格结构成型时的优势和不足,同时,探讨了网格结构设计与成型工艺间的关系。分析了目前网格结构研究中的主要问题,并对未来的发展方向进行了展望。

The fiber reinforced polymer composite grid structure has the characteristics of high specific stiffness, high specific strength, high damage tolerance, and automatic forming, and has broad application prospects in aerospace structures. The stacking, bridge, bending and cutting of the fibers at the intersection of the grid structure severely affect the final performance of the structure. Aiming at the inherent defects at the intersection of the fiber reinforced polymer composite grid structure, this paper summarizes the advantages and disadvantages of filament winding, fiber placement, 3 D rotary braiding, interlocked and vacuum assisted resin transfer molding process in forming grid structure. At the same time, the relationship between the grid structure design and forming process is discussed. Finally, the main problems in the current grid structure research are analyzed, and the future development direction is prospected.