The winding-based method is used for fabricating all carbon fiber reinforced plastic(CFRP) cylindrical honeycomb sandwich shell. The theoretical model of multi-failure modes of the cylindrical honeycomb sandwich shell is established under three-point bending. The multiple failure mechanisms of the honeycomb sandwich shell under three-point bending are revealed by the established three-dimensional failure mechanism map. The theoretical prediction of multi-failure modes is verified by experiments and finite element method. The acoustic emission(AE) technology is implemented to detect the evolution rule of internal damage of honeycomb sandwich shell. The damage patterns of the acoustic emission signals with different failure modes are identified by the unsupervised k-means clustering algorithm. The meso-damage mechanisms are also disclosed by the digital microscope. It was found that high peak frequency of the AE signals represents the face-core debonding failure. Finally, the optimal geometric design of the honeycomb sandwich shell under the bending load was carried out. The damage characteristics from mesoscale damage to macroscale failure provide a crucial foundation for discriminating multiple damage failure modes of structures.

采用缠绕法制备全碳纤维增强塑料（CFRP）圆柱形蜂窝夹层壳。建立了三点弯曲作用下圆柱形蜂窝夹层壳多失效模式的理论模型。建立的三维失效机制图揭示了蜂窝夹层壳在三点弯曲下的多种失效机制。通过实验和有限元方法验证了多失效模式的理论预测。应用声发射(AE)技术检测蜂窝夹层壳内部损伤演化规律。通过无监督k均值聚类算法识别具有不同失效模式的声发射信号的损伤模式。数码显微镜也揭示了细观损伤机制。结果发现，AE 信号的高峰值频率表示面芯剥离失败。最后，对蜂窝夹层壳在弯曲载荷作用下的几何形状进行了优化设计。从细观损伤到宏观失效的损伤特征为判别结构的多种损伤失效模式提供了重要依据。