Welding sequence optimization for the fabrication of Box Girder

Weld induced stresses and distortions are perilous problems owing to reduce weldment's life and performance. Adequate welding sequence assists in reducing distortions and residual stresses in this respect. This research analyzes different welding sequences adopted for the welding of Box Girder plates. FEA of Final four fillet welds on a mockup of Box girder (125 mm width, 216 mm height and 100 mm span) was performed for distortions using Ansys software. Goldak's Model was utilized for thermal analysis and these results were retrieved as nodal loads in structural analysis. Temperature dependent thermal and mechanical properties were incorporated in respective simulations. Effect of changing the weld sequence is briefly explained and the optimum sequence is announced. The proposed solution will be helpful to have minimum distorted shape of Box Girder.