Abstract
The fatigue failure of polycrystalline alumina was measured in a moist air environment at 30° C as a function of constant applied tensile stress and stressing rate. The good correlation found between the fatigue test data and fracture mechanics theory indicates that fatigue is controlled by the slow crack growth of pre-existing flaws and that static and dynamic fatigue test techniques adequately define the fatigue parameters needed for failure predictions. Comparisons of proof-test predictions with experiment indicate that the proof test can be effective in eliminating weak samples from the population and in assuring against the delayed failure of polycrystalline alumina in a moist environment.
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Ritter, J.E., Humenik, J.N. Static and dynamic fatigue of polycrystalline alumina. J Mater Sci 14, 626–632 (1979). https://doi.org/10.1007/BF00772723
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DOI: https://doi.org/10.1007/BF00772723