Description
During the joining of two metal sheets by welding, a process-specifc geometry of the weld is created. The local geometry of the created weld has a decisive infuence on its fatigue strength. This is due to stress concentration at the geometric notches. In this paper, a process known from mechanical engineering called deep rolling is applied on butt welds. The infuence on the local weld geometry and the local stress concentration after deep rolling is investigated. Additionally, a novel automated measurement system using optical laser line scanning is presented. The system is qualifed for the evaluation of the local weld geometry regarding its fank angles and toe radii. The presented investigations show that the deep rolling process infuences the stress concentrations determined by 2D-FE-simulations using real scan data. A correlation between the diference in toe radii or local notch stresses before and after deep rolling and the initial fank angle was found. This indicates that there are process and geometry specifc conditions for the successful application of the deep rolling process.
