Prediction of Welding Deformation and Residual Stress of Stiffened Plates Based on Experiments

1st International Workshop on Materials Science and Mechanical Engineering

材料科学;机械制造

Bai, R.X.^1 ; Guo, Z.F.^1 ; Lei, Z.K.^1

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian

116024, China^1

关键词: Angular deformation;    Elastic-Plastic;    Fillet welds;    Heat sources;    Numerical results;    Stiffened plate;    Welded structures;    Welding deformations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/281/1/012032/pdf
DOI  :  10.1088/1757-899X/281/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Thermo-elastic-plastic (TEP) method is a method that can accurately predict welding deformation and residual stresses, but the premise is to select the appropriate heat source parameters. Aiming at the two welded joints in the stiffened plate studied in this paper, the welding experiments of simple components were carried out respectively, and the corresponding welding deformation and residual stresses were measured. Based on the welding experiment, the corresponding TEP model was established, and the corresponding heat source parameters were obtained according to the experimental data. The comparison between the experimental results and the numerical results shows that the obtained heat source parameters can well predict the welding deformation and residual stress of the welded structure. And then, the obtained heat source parameters were applied to the TEP model of the stiffened plate. The prediction results show that the T-type fillet welds of the stiffened plate can reduce the angular deformation caused by the butt welds to a certain extent. In addition, we can also find that the heat of the subsequent welds can reduce the residual stresses at the completed welds. This method not only can save a lot of experimental costs and time, but also can accurately predict the welding deformation and residual stresses.