The Paton Welding Journal, 2003, №12

2003 №12 (10)

2003 №12 (02)

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The Paton Welding Journal, 2003, #12, 2-6 pages

Residual stresses in explosion treated pipes

V.G. Petushkov

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

Abstract
The problem of inducing circumferential compressive residual stresses in pipes has been studied. Topicality of such studies is attributable to the possibility of using their results to form the assigned fields of residual stresses and strains in pipelines in order to prevent extended fractures and relieve residual welding stresses by explosion treatment, as well as to develop a sufficiently simple procedure for estimation of its efficiency. Described is the approximation procedure for analytical estimation of stresses induced in a thin-walled pipe with a single annular explosive charge, provided that distribution of plastic strains along the generating line is close to the axially symmetric one (assumption of an instantaneous detonation of the explosive charge). Suggested also is a principle of modelling the stress fields thus induced in pipes of different dimension types.
Keywords: explosion treatment of metal, residual stresses, stress relief, welded structure, pipeline, shock wave

References

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Suggested Citation

V.G. Petushkov (2003) Residual stresses in explosion treated pipes. The Paton Welding J., 12, 2-6.

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