Research for the influence of thickness on the energy distribution of splitting and curling circular steel tube
壁厚对金属圆管撕裂卷曲耗能影响的研究

This paper reports the experimental studies and theoretical analyses on axial splitting and curling of A3 steel tubes with different thickness on a conical die. Seven groups of metal circular tubes, with diameter D = 54.4mm, are used as the text specimens. The force-compression curves and deformation modes of specimens are recorded. Three energy dissipation mechanisms are involved: tearing energy, plastic bending energy and friction energy during the specimens deformation. Theoretical analyses find that the influence of tube-thickness on the ratios of tearing energy and the plastic energy to the total energy is considerable and on the ratio of frictional energy to the total energy is slight.