Research for the influence of thickness on the energy distribution of splitting and curling circular steel tube

This paper reports the experimental studies and theoreticalanalyses on axial splitting and curling of A3 steel tubes with differentthickness on a conical die. Seven groups of metal circular tubes, withdiameter D=54.4\,mm, are used as the text specimens. The force-compressioncurves and deformation modes of specimens are recorded. Three energydissipation mechanisms are involved: tearing energy, plastic bending energyand friction energy during the specimens deformation. Theoretical analysesfind that the influence of tube-thickness on the ratios of tearing energy andthe plastic energy to the total energy is considerable and on the ratio offrictional energy to the total energy is slight.