To read this content please select one of the options below:

The Relationship Between Fatigue and Stress Concentration

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Article publication date: 1 March 1947



It is well known that notches have a deleterious influence on the fatigue strength of parts. A constant, the sensitivity index, is commonly used to relate the fatigue stress concentration factor to the elastic stress concentration factor. The author outlines a simpler hypothesis, which he claims to be a more reliable guide to fatigue behaviour in notches. Briefly it assumes that the elastic stress concentration factor gives the reduction in the fatigue strength due to the notch, but because of the local nature of the stress concentration, the endurance limit is increased according to a simple law. This increase in the fatigue strength depends on the smallness of the notch.


Heywood, R.B. (1947), "The Relationship Between Fatigue and Stress Concentration", Aircraft Engineering and Aerospace Technology, Vol. 19 No. 3, pp. 81-84.




Copyright © 1947, MCB UP Limited

Related articles