Abstract
The present work investigates experimentally and numerically the temperature distribution, weld-induced distortion, and residual stress in stiffened plates. The welding process is simulated by a nonlinear thermo-elasto-plastic approach. The obtained temperature distribution and vertical deformation on the stiffened plates show good agreement with the experimental measurements. Obvious differences of residual stresses are observed throughout the direction of plate thickness, especially in the thicker plates. It is concluded that the welding sequence has a significant effect on the welding induced plate distortion and on the longitudinal stress distribution mainly in the lower layer of the plates. Two short welding passes from the middle to the edges are preferred in the industrial fabrications since it results in smaller distortion and residual stress.
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