FEA approach was used widely for the stress and fatigue analysis of welded joints.But the accuracy of FEA results was affected by many factors.In the paper,different cruciform joints models and butt joints models were studied based on the FEA codes ABAQUS.The FEA results proved that the structure discontinuous and the material discontinuous could lead to the stress concentration.But the stress concentration caused by the material discontinuous was fewer.Butt joints model with weld line was more fit,and cruciform joint model needed to choose different forms with or without welds according to the analysis objects,at the same time,experimental verification was necessary to obtain more accurate analysis results.
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