Numerical investigations on a new type of energy-absorbing structure based on free inversion of tubes

摘要: Abstract A new type of structure, called retractable tube, is introduced in the present work to overcome drawbacks two traditional types invertubes. The inversion processes proposed tubes under axial compression are simulated by using non-linear finite element code LS-DYNA and features force–displacement curves deformation modes analyzed. comparative study conducted compare energy absorption characteristics with plain circular based on performance indices used most commonly for energy-absorbing devices. results show that whole efficiencies significantly higher than those corresponding tubes. In addition, a parametric carried out investigate effects geometric parameters behavior