The time independent non-unified version of the Chaboche constitutive model for the cyclic loading which includes the kinematic
and isotropic hardening is discussed in detail. The performance of the Chaboche constitutive model in predicting ratcheting
response of CS1026 steel for a broad set of mechanical uniaxial and biaxial loading histories is considered. A numerical iterative
method is used to calculate the stresses and strains in beams due to cyclic loading. The reported experimental data of the
stainless steel, available in the literature, is used for the verification of the results. It is concluded that the Chaboche
model performs quite well in predicting the uniaxial ratcheting or shakedown responses. In addition, imposing the isotropic
hardening effect to the constitutive equations results to lower ratcheting rate at initial cycles. While the kinematic hardening
effect remains the major factor in prediction of the ratcheting response.
Keywords Plasticity - Cyclic loading - Chaboche model - Beams