RAMALHO, A.L.; FERREIRA, J.A.M.; BRANCO, C.M. (2012) - Residual stresses analysis in plasma dressed welded joints. In Portuguese Conference On Fracture, 13, Coimbra, 2-3 de fevereiro. [S.l.: s.n.]. p. 191-196
978-989-97701-0-2
Title
Residual stresses analysis in plasma dressed welded joints
Subject
Residual stresses Welding simulation FEM
Date
2013-01-21T13:31:12Z 2013-01-21T13:31:12Z 2012-02
Description
The presence of residual stresses in a structure influences his behaviour. Fatigue strength of welded joints is significantly influenced by the presence of residual stresses, of flaws and notch sharpness at the weld toe. Plasma dressing at the weld toe is frequently used to remove flaws and to lessen the notch sharpness at the weld toe. With this re-melt, the stress field in the weld toe is also profoundly modified. The Finite Element Method (FEM) proves to be effective to simulate the stress fields generated by welding. The simplified two-dimensional models (2D) are efficient in this estimation.
This paper presents a 2D finite element model to predict the residual stresses generated by Plasma dressing at the weld toe of a T-joint. The welded T-joints are made in St 52-3 steel, are obtained by covered electrode process and improved with plasma dressing. The analysis was developed with the MSC.Marc finite element code. The estimated stress field is validated with experimental stress results obtained using X-ray diffraction
