Study on energy absorption behavior of bionic tube inspired by feather shaft of bean goose

To improve the crashworthiness and energy absorption of the thin-walled tube, micro-CT is used to observe the section of the feather shaft, we extract the “sawtooth” and “semicircle” structure to design five kinds of bionic thin-walled tubes. The simulation results of axial compression and three-point bending show that the bionic tubes have higher energy absorption efficiency than the traditional square tube. At the same time, quasi-static compression experiment is carried out on BFTZ4 bionic tube (the inner sides are “sawtooth”) with the best energy absorption in numerical simulation. The energy absorption of bionic tube is compared with that of traditional square tube, and its crushing behaviors is studied. It is found that the mean load and specific energy absorption of the bionic empty tube are 1.65 times and 1.35 times that of the square empty tube, respectively. The mean load and specific energy absorption of the bionic filled tube are 1.27 times and 1.24 times that of the square filled tube, respectively. This study provides theoretical and experimental basis for the bionic design of crashworthiness.