On the prediction of the curvature of cross roll straightened bars

A recently proposed procedure for the simulation of cross roll straightening allows to predict successfully the residual stress distribution in straightened bars as well as their yield stress. Although the procedure allows also to make predictions about the curvature of straightened bars, large discrepancies appear between predictions and exper- iments. The present study aims at understanding the causes of these deviations. The standard experimental setup for the measurement of curvature provides values on the assumption of a constant in-plane curvature. Using a modified procedure for the predic- tion of the curvature, this study shows that, according to the model, the curvature of straightened bars is not constant and not in-plane. The reason for the deviation observed between predictions and measurements is then obvious

On the prediction of the curvature of cross roll straightened bars

A recently proposed procedure for the simulation of cross roll straightening allows to predict successfully the residual stress distribution in straightened bars as well as their yield stress. Although the procedure allows also to make predictions about the curvature of straightened bars, large discrepancies appear between predictions and exper- iments. The present study aims at understanding the causes of these deviations. The standard experimental setup for the measurement of curvature provides values on the assumption of a constant in-plane curvature. Using a modified procedure for the predic- tion of the curvature, this study shows that, according to the model, the curvature of straightened bars is not constant and not in-plane. The reason for the deviation observed between predictions and measurements is then obvious