The Paton Welding Journal, 2008, №10

2008 №10 (01)

2008 №10 (03)

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The Paton Welding Journal, 2008, #10, 10-15 pages

Accumulation of fatigue damage in tee welded joints of 09g2s steel in the initial condition and after strengthening by high-frequency mechanical peening

V.V. Knysh, S.A. Solovej, A.Z. Kuzmenko

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Criteria of fracture of welded T-joints on 09G2S steel in as-welded condition and after strengthening by the technology of high-frequency mechanical peening (HFMP) loaded in the decreasing, increasing and quasi-random loading modes, are considered in the context of the hypothesis of linear summation of fatigue damage. It is noted that the linear hypothesis of fatigue damage accumulation is well suitable for prediction of fatigue life of welded joints strengthened by the HFMP technology. For the as-welded joints, where accumulation of damage strongly depends upon the load history, the rule of summation of damage is suggested that decreases the scatter of total damage.
Keywords: welded structures, low-alloyed steels, tee joints, fatigue damage accumulation, high-frequency mechanical peening, cyclic fatigue life

References

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Suggested Citation

V.V. Knysh, S.A. Solovej, A.Z. Kuzmenko (2008) Accumulation of fatigue damage in tee welded joints of 09g2s steel in the initial condition and after strengthening by high-frequency mechanical peening. The Paton Welding J., 10, 10-15.

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