Energy absorption characteristics of a double-filled sinusoidal corrugated filled tube under axial impact

On the basis of the double-filled circular filled tube (DF-CFT), the sinusoidal corrugated curve is replaced by the circular curve, and the double-filled sinusoidal corrugated filled tube (DF-SCFT) is proposed. Firstly, the axial impact energy absorption characteristics of the circular tube, aluminum foam cylinder, and single-filled circular filled tubes (SF-CFT) were studied under a quasi-static compression experiment. The subsequent finite element model, created using the finite element software Abaqus/Explicit and Pro/Engineer, is verified for accuracy by Abaqus/Explicit. A crashworthiness analysis reveals that the DF-A5N5 (DF-SCFT with amplitude A of 5 mm and wave number N of 4) demonstrates improved energy absorption performance and interaction effects, with its specific energy absorption (SEA) being 13.92% higher than that of a DF-CFT. Then, the parameterization of the DF-SCFT is studied systematically. The structures investigated in this paper can serve as a reference for the innovative design of filling structures.