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Experimental Mechanics

, Volume 2, Issue 7, pp 211–214 | Cite as

Fatigue testing of thin tapes

Paper presents basic design of fatigue-testing machine built and used in a series of tests for thin tapes of different materials. Some of the experimental results are also discussed
  • Hui Pih
  • Alex T. Shalkey
Article

Summary and Conclusions

Even though this machine provides one-way bending-fatigue information only, existing relationships (such as Goodman's or Berber's theories3) permit estimating fatigue characteristics for two-way bending.

Comparing the results from tape batches No. 1 and No. 2, it was concluded that the difference in the surface and edge condition, as well as heat treatment and cold working, between specimens are the major causes of the scattering of data. The machine has not been further used consistently on one material or on quantity of samples to produce additional data worthwhile to be presented in the paper.

Though the available data are limited to those in Figs. 5 and 6, several conclusions seem justified:
  1. 1.

    Specimens made from the cobalt-base spring alloy (batch No. 1) had greater fatigue strength than those from batch No. 2, at higher stress levels.

     
  2. 2.

    Cold working (e.g., shot peening) of cobaltbase tapes does not significantly improve the fatigue strength.

     

Keywords

Fatigue Heat Treatment Mechanical Engineer Fluid Dynamics Stress Level 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Bibliography

  1. 1.
    Cazaud, R., “Fatigue of Metals,” pp. 61–86, Chapman and Hall (1953).Google Scholar
  2. 2.
    Hetenyi, M. ed., “Handbook of Experimental Stress Analysis,” pp. 52–59, John Wiley and Sons (1950).Google Scholar
  3. 3.
    Cazaud, R., ibid “Handbook of Experimental Stress Analysis,” pp. 59–61, John Wiley and Sons (1950).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1962

Authors and Affiliations

  • Hui Pih
    • 1
  • Alex T. Shalkey
  1. 1.Marquette UniversityMilwaukee

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