Abstract
In the past decades, thin-plate weldments have been increasingly used in various engineering structures to meet the requirements of lightweight. However, deformation induced by welding process has a negative effect on assembly accuracy and structural integrity. Therefore, it is critical to predict welding deformation and then to control or reduce the total deformation. Because the thermal elastic plastic FEM has the advantage of high computational accuracy, an attempt was made to predict the welding deformation of a large-scale thin-plate welded structure in this study. Based on the commercial software MSC. Marc, a thermal elastic plastic FEM with the consideration of material nonlinearity, geometrical nonlinearity, and boundary nonlinearity was developed to simulate the welding deformation of large-scale welded structures. The effectiveness of the developed computational approach was verified by the experimental measurements. Moreover, the mechanism of buckling distortion in a large-scale stiffened panel structure was investigated based on the simulated results. In addition, the influences of heat input, welding procedures, and constraint condition on welding deformation were also examined numerically.
Published Version
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