부산대학교 도서관

This research paper aims at predict the thermal and residual stresses in dissimilar welds of AA5083 and AA6082 using ANSYS®. The combination of dissimilar components are widely used where high corrosion resistance and good mechanical properties required. Thermo-mechanical properties were predicted by developing 3-Dimensional Goldak ellipsoidal model. Suitable boundary conditions were applied during simulation in order to predict accurate results in the welded structures. Element types, SOLID 70 for thermal and SOLID 185 for structural analyses were considered. Convective heat transfer co-efficient and radiation boundary conditions were considered during thermal analysis. The FE results obtained from these thermal model were taken into account to predict the stress formation along welding and transverse direction. For this, static structural analysis has been performed. The stress formation in TIG welding process were predicted at different zones of welded structures. In order to validate these stress values at different locations, XRD technique is used to measure the stress distribution experimentally. Peak temperatures were predicted during the course of process when the source model is moving along the welding direction. The predicted residual stresses are validated and which are in good agreement with measured values and the measured data values are within yield limits only.