Berechnung der Umformeigenspannungen beim Fließpressen und Vergleich mit experimentellen Ergebnissen

Determination of Deformation-induced Residual Stresses in Full Forward Extrusion and Comparison to Experimental Results The macroscopic residual stresses induced by cold forward extrusion of rods are calculated by the finite element method. For an experimental determination of the residual stresses X-ray diffraction and neutron diffraction as well as the hole drilling method are applied. The results of the experiments and the calculations are in qualitative agreement, those of the experiments even are in good quantitative agreement. They allow the investigation of the influence of the processing parameters. Thus, a product optimisation with respect to residual stresses is enabled.