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This study examines the conditions of the transition from progressive plastic buckling to dynamic plastic buckling on thin-walled circular tube with an increase in the impact velocity. This report deals with the discussion of numerical analysis for buckling modes. Their buckling modes are progressive plastic buckling, dynamic plastic buckling and funnel-form type deformation. FEM were used for sixteen kinds of ends conditions. The transitions of their plastic buckling modes of circular tube for impact axial loading were obtained for change of initial deformations and impact velocities.

Transition of Plastic Buckling Modes for Circular Tubes Subjected to an Impact Axial Compressive Load.