Crashworthiness of Bionic Arc-Like Hierarchical Honeycomb Structure
LI Xiang1,2,3, LI Ningchuang2, SUN Shuang4, FU Junjian1,2,5, WEN Kang2
1. Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance, China Three Gorges University, Yichang 443002, China;
2. College of Mechanical & Power Engineering, China Three Gorges University, Yichang 443002, China;
3. Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment, China Three Gorges University, Yichang 443002, China;
4. HXF SAW Co., Ltd., Yichang 443003, China;
5. State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Honeycomb structure is one of the most widely used energy-absorbing structures. In this study, a bionic arclike hierarchical honeycomb structure is designed using motherwort rhizome, quadrangular bamboo, and spider web as bionic prototypes. The simplified super-folded unit theory is used to derive the analytical value of the average collision force of the bionic arc-like hierarchical honeycomb structure under axial impact load, and the accuracy of theoretical value is verified by numerical simulation to analyze the influence of layer number and dimensional parameter on the structural crashworthiness. The results show that the increase in layer number can effectively reduce the peak collision force of the arc-like honeycomb structure and greatly improve the mean collision force of the structure, and the mean collision force of the primary and secondary structures can be improved significantly by 25.46% and 29.98%, respectively, compared with that of the zero-level structure. The increase of the wall thickness and wall length can significantly improve the mean collision force of the structure, in which the wall thickness has more significant influence on the mean collision force and the specific energy absorption of the structure.
2024, 
