The Useful Data To Be Derived From Fatigue Tests

Author:  Almen, J. O.
Source:  Metal Progress, August, 1943, p. 254
Doc ID:  1943004
Year of Publication:  1943
Abstract:  
In this article, which is part of an address given before the Detroit Chapter last winter, the thesis is argued that the machine designer should be most interested in that part of the fatigue curve (the S-N curve, so-called) which shows the cycles to failure at loads which give but limited life--above the endurance limit. Experience shows that this portion of the S-N curve becomes steeper as the test piece contains more intense stress raisers. Application of these considerations to design will be the subject of the final article next month.