Numerical study on the transition of plastic buckling modes for circular tubes subjected to an axial impact load

This numerical study examines the conditions for the transition from progressive plastic buckling to dynamic plastic buckling of thin-walled circular tubes with an increase in the axial impact velocity. Progressive plastic buckling, dynamic plastic buckling and a funnel-form type deformation are studied using a finite-element method for sixteen kinds of end conditions. The transitions of the plastic buckling modes for the circular tubes were obtained for a range of initial deformations and impact velocities.