Creep stresses have been derived for a circular cylinder subjected to torsion by using Seth transition theory. Seth’s transition theory is applied to problems of thickness variation parameter in a thin rotating disc by finite deformation. Neither the yield criterion nor the associated flow rule is assumed here. The results obtained here are applicable to compressible materials. If the additional condition of incompressibility is imposed, then the expression for stresses corresponds to those arising from Tresca yield criterion. It has been observed that the value of maximum shear stress for a cylinder subjected to torsion of compressible material is greater than as compared to incompressible material.
Keywords: creep stress, cylinder, torsion, shear stress, compressibility