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Residual stress analysis in TIG welded joints
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Orientador(es)
Resumo(s)
Abstract. Fatigue strength of welded joints is significantly influenced by the presence of residual stresses due to welding, of flaws and notch sharpness at the weld toe. Compressive residual stresses enhance the fatigue behavior of the structure, while tensile ones impair it. TIG dressing at the weld toe is frequently used to remove flaws to lessen the notch sharpness at the weld toe and to introduce compressive residual stresses. This paper presents a 2D finite element model to predict the residual stresses generated in a TIG dressing at the weld toe of a T joint. The welded T joints are made in St 52-3 steel and are obtained by covered electrode process. The analysis was developed with the Marc finite element code. The modeled stress field is compared with some measurements of residual stresses obtained using X-ray diffraction and the strain gauges technique.
Descrição
Palavras-chave
Fatigue Residual stresses Finite element analysis
Contexto Educativo
Citação
RAMALHO, A. L. ; FERREIRA, J.A.M; BRANCO, C.M. (2002) - Residual stress analysis in TIG welded joints. In Portuguese Conference on Fracture, 8, Vila Real, 20-22 de fevereiro. Vila Real : UTAD. p.271-279