Evaluation of the Possibility of Estimating Cyclic Stress-strain Parameters and Curves from Monotonic Properties of Steels

Abstract

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, Re’) 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 Re’.