Fatigue Strength of Turbine Shafts with Shrunk-on Discs-Reference-Cited by-同舟云学术

Fatigue Strength of Turbine Shafts with Shrunk-on Discs

Published:1963-06 Issue:1 Volume:178 Page:147-160
ISSN:0020-3483
Container-title:Proceedings of the Institution of Mechanical Engineers
language:en
Short-container-title:Proceedings of the Institution of Mechanical Engineers

Author:

Coyle M. B.¹,Watson S. J.¹

Affiliation:

1. A.E.I. Research Laboratory, Manchester.

Abstract

In 1956–57, the shafts of three large built-up steam turbine rotors developed fatigue cracks in service under very low nominal working stresses. The fatigue cracks occurred at changes in shaft section and unexpectedly large strength reduction factors were realized. The failures have been substantially explained by fatigue tests on the shaft materials, in which normal ratios of fatigue strength/ultimate tensile stress were obtained with plain specimens up to 2 5/8 in in diameter, and strength reduction factors up to 10 were obtained with model rotor shafts about 4 in in diameter with shrunk-on collars. Additional tests have verified that modifications introduced into service at the time of the failures were effective in substantially increasing fatigue strength, and have shown the effect on fatigue strength of variations in the geometry of shafts and wheel bores.

Publisher

SAGE Publications

Subject

General Engineering

Link

http://journals.sagepub.com/doi/pdf/10.1177/002034836317800121

Reference7 articles.

1. Some Features of the Design and Operation of the Castle Donington Power Station

2. Grover H. J. ‘Allowance for stress concentration in design to prevent fatigue’, Proc. Int. Conf. Fatigue of Metals 1956, 83 (Instn Mech. Engrs, London).

3. The Size Effect in Fatigue of Plain and Notched Steel Specimens Loaded under Reversed Direct Stress

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