Comparison of residual stresses on long rolled profiles measured by X-ray diffraction, ring core and the sectioning methods and simulated by FE method

• 3 experimental methods are compared to numerical results of F.E. simulations.
• The stress magnitude and distribution are validated.
• The homogeneity of the stress within the thickness enable to use the XRD method.
• The ring core method doesn’t show local peaks but the results are consistent.
• Despite the noise of the sectioning technique, a realistic trend is reached.

Sheet piles are produced by hot rolling, a cooling step and, if required, by a straightening operation. Numerical simulations indicate that the stress field is almost homogeneous through the thickness, justifying the comparison of X-ray diffraction, ring core and the sectioning methods applied after the cooling step and after the straightening process. The equipment, the steps of the experimental procedures and the results are detailed, showing the limits, the specificities and the advantages of each method. Moreover, the amplitude and the distribution of the stresses along the width of the sections present good agreement with results of numerical simulations.