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Comment on the Effect of Proof Stress on Notched Fatigue Strength

Published online by Cambridge University Press:  04 July 2016

E. R. Welbourne
E. R. Welbourne*
Affiliation:
Technical Department, Royal Aeronautical Society
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Extract

In his note, Forrest compares the results of an experimental investigation of the notched fatigue strength of HE 15 aluminium alloy (L.64/L.65 type) in three conditions of heat treatment with predicted values obtained using the analysis by Gunn. This analysis appears in R.Ae.S. Fatigue Data Sheets A.00.01 and .02.

The analysis requires a minimum knowledge of four parameters, Kt’ the elastic stress concentration factor, ft the tensile strength, ƒp the 0·1 per cent proof stress and Sao the fatigue strength under reversed loading for the specified endurance Ncycles.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 67 , Issue 636 , December 1963 , pp. 798 - 799
Copyright
Copyright © Royal Aeronautical Society 1963

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References

1.Forrest, P. G.A Note on the Effect of Proof Stress on the Notched Fatigue Strength of the Aluminium Alloy HE 15. Journal of the Royal Aeronautical Society, Vol. 67, No. 633, September 1963.Google Scholar
2.Gunn, K.Effect of Yielding on the Fatigue Properties of Test Pieces Containing Stress Concentrations. Aeronautical Quarterly, Vol. 6, No. 4, November 1955.Google Scholar
3.Heywood, R. B.Designing Against Fatigue (Chap. 3). Chapman and Hall, London, 1962.Google Scholar