Abstract Scope |
Accurate prediction of welding deformation of large structures with high efficiency is important for fabrication of these structures. Although thermal-elastic-plastic finite element method is the basic method to simulate welding deformation, it is unrealistic for large structures because of its low computational efficiency. Local-global approach was adopted in this paper to simulate the welding deformation of a thin-walled skin-stringer structure with four longitudinal stringers made of titanium alloy, and these stringers with thickness of 1.5 mm were welded to the skin with thickness of 2mm by laser beam. The structure has no transversal stringers, so the rigidity of the structure is small, and the simulation of the deformation is difficult. The experimental and simulated results were provided, and local-global finite element simulation model was validated by the experiments, and the characteristics of the welding deformation of this kind of structure were provided. |