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Life Evaluation of a Stream Turbine Shutoff Valve Body Under Thermomechanical Loading With Form Changing

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Strength of Materials Aims and scope

The procedures of solving geometrically nonlinear deformation problems and computing fracture mechanics parameters developed by the authors became the basis for evaluation the geometrically nonlinear deformation effect on the design life of an initially cracked shutoff valve body under thermomechanical loading. For the initial crack located in the region of maximum tensile stresses, the equivalent stress intensity factor was defined for the case of combined fracture in terms of KI and KII. With the form changing effect, the equivalent stress intensity factor decreases by 2–4% on crack extension within its critical length, which will serve to increase the design life under cyclic loading by more than 12–13%.

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Authors and Affiliations

  1. Kyiv National University of Construction and Architecture, Kyiv, Ukraine

    V. A. Bazhenov, Yu. V. Maksymyuk & O. O. Shkryl

  2. National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

    S. O. Pyskunov

Authors
  1. V. A. Bazhenov
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  2. S. O. Pyskunov
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  3. Yu. V. Maksymyuk
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  4. O. O. Shkryl
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Corresponding author

Correspondence to S. O. Pyskunov.

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V. A. Bazhenov is deceased.

Translated from Problemy Mitsnosti, No. 4, pp. 56 – 64, July – August, 2022.

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Bazhenov, V.A., Pyskunov, S.O., Maksymyuk, Y.V. et al. Life Evaluation of a Stream Turbine Shutoff Valve Body Under Thermomechanical Loading With Form Changing. Strength Mater 54, 604–612 (2022). https://doi.org/10.1007/s11223-022-00438-8

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  • DOI: https://doi.org/10.1007/s11223-022-00438-8

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