Automatic Welding, 2024, №06



2024 №06 (02)

DOI of Article 10.37434/as2024.06.03

2024 №06 (04)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #6, 2024, pp. 17-22

Peculiarities of calculation of stress concentration factors in thin-sheet butt welded joints with the consideration of initial angular deformation

A.V. Moltasov, P.M. Tkach, M.M. Dyman, I.G. Tkach, V.G. Kot

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: moltasov@gmail.com

The paper is devoted to the study of the influence of the initial angular deformation caused by uneven transverse sagging of the butt weld during its cooling on the stress concentration factors (SCF) in the transition zones from the face reinforcement and the weld root to the base metal (BM). An analysis of the existing formulas was carried out to determine the factor that considers the influence of the initial angular deformation on the SCF at the fusion line of the weld with the BM. An analysis of the available formulas was carried out to determine the factor that takes into account the effect of the initial angular deformation on the SCF at the weld line with the BM. As a result, it was found that these formulas were developed for joints with a butt weld symmetrical with respect to the median plane of the plates being welded and cannot be used for calculations near the root of the weld. A theoretical justification is given that the initial angular deformation should lead to a decrease in stresses on the root side of the joint. New analytical formulas for determining the SCF on the fusion line of the weld root with the BM are proposed, that take into account the initial angular deformation. A specific example was used to show that the presence of an initial angular deformation really results in a decrease in stresses on the root side of the joint. The results of analytical calculations were confirmed by numerical calculations using the finite element method. 18 Ref., 1 Tabl., 4 Fig.
Keywords: butt welded joint, angular deformation, stress concentration, tension, bending, weld root


Received: 25.09.2024
Received in revised form: 22.10.2024
Accepted: 12.12.2024

References

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