Dynamic plastic response of tubular beams to intense loading

When a tubular cantilever beam is loaded by a dynamic force applied transversely at its tip, the strain hardening of the material tends to increase the Ioad carrying capacity while local buckling and crosssectional Overlization occurring in the tube section tend to reduce the moment carrying capacity and result in structural softening. A theoretical model is presented in this paper to analyse the deformation of a tubular beam under a dynamic response mode. The hardening/softening M - κ relationship is introduced, Based on a large deflection analysis. The present main interest is on the curvature development history and the deformed configuration of the tubular beam.