THE problems of fatigue testing are usually associated with the testing of specially machined specimens in a reverse loading machine such as the Whöler. Tests of this nature are designed to disclose the characteristic fatigue curve of the material freed from all imperfections necessitated in a mechanical structure by machining or design. The usual presentation of the results is, of course, in the form of the familiar S/N diagram, where the number of cycles required to produce a failure are plotted against the magnitude of the applied stress.
Gardiner, G.C.I. (1949), "Some Aspects of Propeller Fatigue Testing: A Paper on the Practical Application of the Results of Fatigue Testing to the Design of Components", Aircraft Engineering and Aerospace Technology, Vol. 21 No. 5, pp. 149-152. https://doi.org/10.1108/eb031762
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