Numerical Behavior Study of Expanded Metal Tube Absorbers and Effect of Cross Section Size and Multi-Layer under Low Axial Velocity Impact Loading

In this paper, the performance of the Expanded Metal Tube absorbers under axis impact loading was investigated. A cylindrical expanded metal sheets is used as an energy absorber. Thin-walled expanded metal sheets, despite their low weight, have high energy absorption capacity. The cellular direction of expanded metal sheets will have a large impact on the absorber behavior. In this study, a sheet with angle α=0 is used to create a cylindrical Expanded Metal Tube absorber. In this study, to evaluate the performance of energy absorption caused by the collapse and to achieve maximum energy absorption, a numerical study of the effect of the cross-section size and making the absorber a multi-layer one on the energy absorption behavior has been discussed. Numerical studies have been performed by the ABAQUS Finite Element Method software. The output of ABAQUS software is displayed in form of the force-displacement diagram. In this study, numerical investigation of collapse, force-displacement and the effective parameters have been carried out. From the results obtained, it was observed that increasing the size of the cross-section and making the absorber multi-layer , will have a significant effect on the initial maximum crushing force and energy absorption capacity and making the absorber a multi-layer improves the crushing efficiency.