Abstract
MESSRS. G. F. Jenkin and G. D. Lehmann have prepared an important report on the subject of high frequency fatigue. These researches, the object of which was to determine the effect of the frequency of alternation of stress on the fatigue limits of various metals, were carried out in the Engineering Laboratories of the University of Oxford, and tests were made on rolled, normalised, and hardened steel; rolled aluminium, annealed copper, and normalised armco iron. The ordinary frequency employed in fatigue tests is 50 periods per second, though in 1924 Jenkin2 carried out work up to 2000 periods per second, and in the research described in this paper frequencies up to 20,000 periods per second were used. In all the higher frequency tests the specimen consisted of a bar supported at the nodes, and vibrating freely.
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References
Air Ministry: Aeronautical Research Committee. Reports and Memoranda. No. 1222 (M. 62): High Frequency Fatigue. By G. F. Jenkin and G. DLehmann. (E.F. 219.) Pp. 34. (London: H.M. Stationery Office, 1930.) 1s. 6d. net.
Proc. Roy. Soc., A, vol. 109; 1925.
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High Frequency Fatigue1. Nature 125, 617 (1930). https://doi.org/10.1038/125617a0
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DOI: https://doi.org/10.1038/125617a0