The software UltraMARS is a separate optional product. This software consists of Advance Database (AD) and Expert System (ES) for Analysis of the Effect of Residual Stresses on Fatigue Life of Welded Elements. An example of presentation of the residual stress measurement data, using the developed AD, is shown in Figure 1. The software allows comparing different data on residual stress measurement and transferring selected data for further fatigue analysis. In Figure 1, the left side of the screen displays information on the measured ultrasonic wave velocities as well as other pertinent technical information on the sample. The right side of the screen displays the distribution of calculated residual stresses.
In the example presented below, a plate made from low carbon steel, with a yield strength of 296 MPa, was heated locally, with the focal point of heating located approximately 50 mm from the left side of the plate. The distribution of both components of residual stresses in the specimen, as a result of this local heating are shown in the right side of Figure 3. As can be seen, in the heating zone, both residual stress components are tensile and reach the yield strength of the considered material. In the compression zone, located between the edge of the plate and the centre of the heating zone, the longitudinal component of residual stresses reaches – 140 MPa.