Welding-induced stresses and distortion in high-strength steel T-joints: Numerical and experimental study

The main objective of this study is to develop a computational approach based on the finite element (FE) method efficiently predict welding deformations and residual stresses fillet welded T-joints made high strength steel (HSS), S700, using different sequences external constraints. With aim, thermo-elastic-plastic FE models were developed in ABAQUS code Goldak's double ellipsoidal heat source model, material non-linearity geometrical non-linearity. results terms temperature fields, angular distortion transverse stress verified against measurements. showed that significantly impacted by configuration constraints, while longitudinal less affected. It was found had smaller effect sequential cumulative distortions final than are meaningful for understanding calibration accuracy approaches simulate processes. Additionally, from practical point view, important understand control measures structural members HSSs.