NUMERICAL SIMULATION OF THE WELDING DEFORMATION BASED ON A NEW INHERENT STRAIN METHOD

Take a welded T-joint as example, the formation mechanism of angle distortion of fillet weld was studied by combining thermal elastic plastic analysis with mapping strain component method. The results show that the main source of angle distortion of fillet weld is the inherent shear strain instead of the transverse inherent normal strain. Then, based on the view, two different loading directions that influence transverse restraint degree, transverse inherent strain and residual angle distortion were analyzed. The result made by the diagonal load along the weld surface is closer to the measured values and the thermal-elastic-plastic simulated values, which indicate the rationality of the diagonal loading along weld surface. This paper provides beneficial reference for more rational utilization inherent strain predicting weld residual deformation.