A TWO-SURFACE MODEL FOR STEELS WITH YIELD PLATEAU

Abstract

The mechanical behavior of the material under cyclic loading is much more complicated than that of monotonic loading. Recently, an attention has been paid to the two-surface models to predict the behavior of structural steels under cyclic loading. These models, however, may not give an accurate prediction of the elasto-plastic behavior of the structural mild steels under cyclic loading. This is because an important feature of the yield plateau is not treated well. In this paper, a new two-surface model is proposed , by which the cyclic behavior in the yield plateau is accurately predicted. In addition , a comparison between the experimental data and the prediction by the new model is shown.