Edge Effect on Analysis of Residual Stresses in Steel Welded Parts Using Ultrasounds

Our past research to estimate residual stress into steel welded parts was based on dependence between sound velocity and elastic modulus using longitudinal sound wave. To conduct the experiments was designed sample as a frame. The sample was loaded using adapted equipment and the results were used for FEA tools (SolidWorks SimulationXpress) to obtain the distribution of stresses and displacements. This approach allowed the location of points of interest to the investigation with ultrasound. During the experimentation we arrived to suspect the influence of marginal effect on analysis of residual stresses in steel welded parts using ultrasounds. New experiments were carried out by using part samples permitting to avoid the marginal effect.