Determining the plasticity properties of materials including the kinematic and isotropic hardening properties using a developed computer code

One of the most important topics in the context of plasticity is obtaining the material hardening properties to be used in performing numerical analysis, especially when the applied load is cyclic and its value is higher than elastic limit. In this case, investigation of the kinematic hardening, which considers bauschinger effect, is very important. Since obtaining hardening coefficients of the materials using analytical methods, not only is difficult but also it usually provides significant error in the results. Hence, a computer code is developed for calculating these coefficients. In this study, to validate the calculated coefficients, the associated parameters are obtained for SS 304LN using both numerical and analytical methods and the results are compared with the experimental data. Then, these coefficients are used to study the ratcheting behavior of a SS 304LN elbow which is subjected to constant internal pressure and cyclic bending moment The results of this case study are also compared with the experimental data provided in the literature and good agreement is obtained.