TRANSITION OF PLASTIC BUCKLING MODES FOR CIRCULAR TUBES SUBJECTED TO AN AXIAL COMPRESSIVE IMPACT LOAD

摘要

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 FEM 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.