Occurrence of strain nonuniformity in thin-walled cylinders subjected to constant axial compressive force and cyclic torsion

摘要

Hysteretic behaviour numerical analysis has been carried out for elastic–plastic thin-walledncylinders subjected to a constant axial compressive force and cyclic torsion. It is shown thatnvarious deformation modes appear, which are different from those under constant axialncontraction, and that those modes cause rapid growth of strain nonuniformity. Also branchingnanalysis for the same model has been performed according to symmetry limit theory and thenpredicted multiple branching behaviour is compared with the hysteretic behaviour.