“…in-walled structures are studied from simple circular, square, triangular, polygonal, and other conventional structures [2][3][4][5][6]; the deformation mode of conventional structures was studied in detail by experiment and theory. Based on these, various methods have been used to improve the mechanical properties of traditional tubes, including multi-cornered section structure [7], corrugated tubes [8][9][10], multi-cell structure [11], nested tubular structures [12][13][14], filling tubes with foam [15,16], honeycomb structure based on bionic design [17][18][19][20], and variable thickness design [21][22][23][24]. However, in the process of improving the performance, the deformation mode of some structures is unstable, which does not make the maximum energy absorption efficiency of the material.…”