Energy absorption of axially compressed thin-walled square tubes with patterns

摘要: Abstract The paper suggests the introduction of patterns to surface conventional thin-walled square tubes improve energy absorption capacity under axial compressive loads. A quasi-static crushing analysis has been conducted numerically by nonlinear explicit finite element code LS-DYNA. Two types constructed using basic pyramid elements were introduced. Type pattern was aimed at triggering extensional mode for relatively thin whereas type B intended develop new collapse capable absorbing more during collapse. total 30 with a length 120 mm, thickness 1.2 mm and widths 40 or 60 mm simulated. Numerical results showed that all developed instead symmetric absorbed about 15–32.5% than mass increase less 5%. Meanwhile, named octagonal observed developing this increased 54–93% compared tube. influence various configurations on deformation also discussed. opens up avenue in design high components.