Strain-controlled fatigue properties of steels and some simple approximations

In this study, first strain-controlled deformation and fatigue data are rep orted and compared for several steels most commonly used in the ground vehi cle industry. Correlations between monotonic tensile data and constant ampl itude strain-controlled fatigue properties are then investigated, and valid ity of some of the more commonly used methods of estimating fatigue propert ies is examined. A simple method requiring only hardness and modulus of ela sticity is proposed for estimation of the strain-life curve. Prediction cap ability of this method is evaluated for steels with hardness between 150 an d 700 HB and compared with several other methods proposed in the literature . The proposed method is shown to provide good approximations of the strain -life curve. (C) 2000 Elsevier Science Ltd. All rights reserved.