结构-功能一体化异种复合材料壁板优化与验证

基于航空壁板结构承载-电气功能的一体化需求,对适用于智能蒙皮的异种复合材料壁板开展了优化设计与试验验证。通过在高模量碳纤维蒙皮的外侧增加玻璃纤维层,进行了以碳纤维-玻璃纤维-金属结构单元阵列-玻璃纤维复合顺序的壁板承载-电气功能一体化设计。针对异种复合材料结构的铺层优化需要考虑共胶接的分区域及铺层连续性的工艺要求,发展了基于丢层序列的优化方法,并对于加筋壁板的几何外形、筋条数量、筋条几何参数以及筋条与蒙皮的铺层角度进行了优化设计。通过压缩稳定性试验验证了该结构在承载能力和稳定性方面的收益,明晰了其压缩载荷下的屈曲模态及后屈曲失效机理。

Optimization and Verification of a Structure-Function Integrated Heterogeneous Composite Wall Panel

Based on the integrated requirements of load-bearing and electrical functions of aviation wall panel, an optimized design and an experimental verification are conducted to heterogeneous composite material wall panel suitable for intelligent skin. By adding a glass fiber layer in the outer side of the high modulus carbon fiber skin, a wall panel load-bearing electrical functional integration design is carried out in the order of carbon fiber glass fiber metal structural unit array glass fiber composite. The layer optimization of heterogeneous composite material structures is in consideration of the zoning of co bonding and the process requirements for layer continuity. An optimization method based on layer dropping sequence is developed, and the geometric shape, number of ribs, geometric parameters of ribs, and layer angle between ribs and skin of the reinforced wall panel are optimized. The benefits of the structure in terms of load-bearing capacity and stability are verified through compression stability tests, and the buckling mode and post buckling failure mechanism under compression load are clarified.