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A Method for Increasing the Fatigue Life of Pump Rods

  • RELIABILITY, STRENGTH, AND WEAR RESISTANCE OF MACHINES AND STRUCTURES
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Abstract

A method for increasing the fatigue life of pump rods and similar elongated cylindrical products is considered. The method consists in creating normal compressing residual stresses in the near-surface region of the product; the stresses are created by sequential elastoplastic deformation: first, by extension, then, when fixed under axial strain, by torsion. It is shown how the residual stresses are generated in the bulk product during its hardening by combined extension and torsion.

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Funding

The work was supported by the Russian Foundation for Basic Research, project no. 19-01-00555 A.

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Authors and Affiliations

  1. Perm National Research Polytechnic University, Perm, Russia

    A. A. Kryukov & V. E. Wildemann

Authors
  1. A. A. Kryukov
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  2. V. E. Wildemann
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Correspondence to A. A. Kryukov.

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Translated by E. Oborin

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Kryukov, A.A., Wildemann, V.E. A Method for Increasing the Fatigue Life of Pump Rods. J. Mach. Manuf. Reliab. 49, 932–937 (2020). https://doi.org/10.3103/S1052618820110102

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  • DOI: https://doi.org/10.3103/S1052618820110102

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