The Paton Welding Journal, 2001, №02

2001 №02 (01)

2001 №02 (03)

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The Paton Welding Journal, 2001, #2, 8-11 pages

Some regularities in formation of residual stresses in zones of a stress raiser and fatigue crack at cyclic loading

V.A. Brodovoj, P.P. Mikheev, O.I. Gushcha

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

Abstract
Using nondestructive acoustic method, the fields of residual stresses occurring in samples (St.3) with a stress raiser at the first cycles of loading and in the process of a growth of the fatigue crack are investigated. It is shown that a biaxial field of residual stresses is formed at a cyclic loading in the zone of a stress raiser. The stress field with a high gradient occurs at a fatigue crack tip.
Keywords: cyclic loading, residual stresses, stress concentration nondestructive acoustic method, gradients of fields of residual stresses, small-base transducers, experiments

References

1. Kudryavtsev, Yu.F., Gushcha, O.I. (1986) Some regularities in changing residual stresses at cyclic loading depending on their initial level and concentration of stresses. Problemy Prochnosti, 11, 32 - 38.
2. Trufyakov, V.I., Gushcha, O.I., Kudryavtsev, Yu.F. (1981) Alternation of residual stresses in welded joints at cyclic loading. IIW Doc. XIII-1031-81.
3. Trufyakov, V.I., Gushcha, O.I., Trotsenko, V.P. (1975) Kinetics of residual intensity in specimens with stress raisers at cyclic loading. Avtomaticheskaya Svarka, 4, 5-7.
4. Ueda, K., Yamamoto, S., Takanashi, M. (1996) Residual stress relaxation by reversed loading. IIW Doc. XIII-1628-96.
5. Andreev, A.V. (1976) Engineering methods of determination of stress concentration in machine parts. Moscow: Mashinostroyeniye

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Suggested Citation

V.A. Brodovoj, P.P. Mikheev, O.I. Gushcha (2001) Some regularities in formation of residual stresses in zones of a stress raiser and fatigue crack at cyclic loading. The Paton Welding J., 02, 8-11.

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