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Assessment of the service life of structural steels by using degradation models with allowance for fatigue and creep of the material

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Abstract

A mathematical model is developed within the framework of equations of damaged medium mechanics to describe the processes of viscoplastic straining and damage accumulation in structural steels with allowance for fatigue and creep of the material. A model of damage summation due to interaction of low-cycle fatigue and creep of the material is proposed. Material parameters and scalar functions of equations of mechanics of damaged media are determined. Viscoplastic straining and fatigue-induced damage accumulation in 08Kh18N10T and 12Kh18N9 are studied numerically, and the data obtained are compared with available results of physical experiments.

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Authors and Affiliations

  1. Volga State University of Water Transport, Nizhny Novgorod, 603950, Russia

    I. A. Volkov & Yu. G. Korotkikh

  2. Research Institute for Mechanics at the Lobachevsky State University of Nizhni Novgorod, Nizhny Novgorod, 603022, Russia

    V. V. Egunov, L. A. Igumnov & D. A. Kazakov

  3. Afrikantov Experimental Design Bureau for Mechanical Engineering, Nizhny Novgorod, 603074, Russia

    F. M. Mitenkov

Authors
  1. I. A. Volkov
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  2. V. V. Egunov
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  3. L. A. Igumnov
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  4. D. A. Kazakov
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  5. Yu. G. Korotkikh
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  6. F. M. Mitenkov
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Correspondence to I. A. Volkov.

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Original Russian Text © I.A. Volkov, V.V. Egunov, L.A. Igumnov, D.A. Kazakov, Yu.G. Korotkikh, F.M. Mitenkov.

Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 56, No. 6, pp. 70–83, November–December, 2015.

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Volkov, I.A., Egunov, V.V., Igumnov, L.A. et al. Assessment of the service life of structural steels by using degradation models with allowance for fatigue and creep of the material. J Appl Mech Tech Phy 56, 995–1006 (2015). https://doi.org/10.1134/S0021894415060097

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  • DOI: https://doi.org/10.1134/S0021894415060097

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