Scales of Metal Fatigue Limit


The paper analyzes the scale hierarchy of transitions from very high to high and low cycle fatigue which are taken as fatigue limit according to the Wöhler concept. The analysis shows that the life distribution in the transition range 106–108 cycles is multimodal. From relations between the fatigue limit σ–1 and mechanical characteristics σU and σ0.2 in aircraft materials based on Fe, Al, Mg, Ti, and Cu it follows that σ–1 depends on σU and σ0.2 and the ratio σ–10.2 depends on σ0.2U. As σ–10.2 increases, the complete diagram of three fatigue scales degrades. The transition from very high to low cycle fatigue goes without high cycle fatigue at σ–10.2 ≥ 1.

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The work was supported by RSF, grant No. 19-19-00705.

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Correspondence to A. A. Shanyavskiy.

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Russian Text © The Author(s), 2019, published in Fizicheskaya Mezomekhanika, 2019, Vol. 22, No. 1, pp. 44–53.

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Shanyavskiy, A.A., Soldatenkov, A.P. Scales of Metal Fatigue Limit. Phys Mesomech 23, 120–127 (2020).

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  • fatigue limit
  • mechanical characteristics
  • aircraft structural materials
  • scales