Evaluation of the possibility of estimating cyclic stress-strain parameters and curves from monotonic properties of steels

摘要

This article presents the results of an investigation on the estimation of cyclic stress-strain curves and parameters K' and n' using two different approaches: the direct estimation from monotonic properties and the indirect approach where relations between monotonic properties and points on cyclic stress-strain curve (in this case, R_e') are identified first and then new values of K' and n' are obtained from them. For both approaches, series of regression analyses were performed using 206 datasets for unalloyed, low-and high-alloy steels. Statistical evaluation of results showed that the second approach is much more suitable for estimation of R_e'.