Determination of stress and strain concentrations in the elastic-plastic materials under bending and torsion

The analysis of stress and strain concentrations of constructional materials subjected to bending and torsion is presented. The known methods of stress determination for any elastic-plastic material assume the linear strain concentration under bending and torsion. The determination of stress and strain concentrations and their presentation as graphs were the main aims of this paper. Five materials were tested. They had different cyclic strain curves and were loaded by torsional and bending moments. The results proved the linear character of the strain distribution for any material in the entire applied loading range.