ABSTRACT Using the method of combining axial compression experiment with finite element simulation, the axial compression characteristics and failure mechanisms of 3D braided‐unidirectional ply (3D‐UD) hybrid tubes were investigated. Test results show that the peak force ( P max ), total absorbed energy ( E ), and specific energy absorption ( E sa ) of 3D‐UD hybrid tube are increased by 44%, 109%, and 67% respectively compared to the UD tube. Combination of experimental and simulation failure analysis of the hybrid tube, it is found that the outer 3D layer and the inner 3D layer can effectively improve the damage degree of interlayer UD. At the same time, the stability failure and energy absorption of the sandwich UD tube prevent the 3D tube from serious braided layer crimp. Based on the complex proportional assessment (COPRAS) method for comprehensive performance, GA‐BP optimization model is used to compare and optimize the comprehensive performance of hybrid structures. Through the algorithm optimization and simulation verification, the results show that the comprehensive performance of D 20 S40U 10 C65 is the best. Therefore, the hybrid tube can effectively resist the wall deformation and improve the stability and energy absorption under axial compression. The present study is expected to illustrate the potential of such hybrid structure as an energy absorption device and offer some design guidance for application.
Zha et al. (Mon,) studied this question.