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Journal of Engineering Thermophysics

, Volume 17, Issue 4, pp 292–299 | Cite as

Numerical and experimental investigations of the effect of repeated cyclic thermal loads on the strength of materials of recoverable liquid-propellant rocket engines

  • V. I. Bubnov
  • D. V. Isakov
  • I. G. Lozino-Lozinskaya
  • A. M. Polyanskii
Article
  • 33 Downloads

Abstract

Elements of the liquid-propellant rocket engines (LPREs) are subject to the action of intense mechanical and thermal loads, which are temporally related to the start-up, normal regime, and switch-off periods of the working cycle. Recoverable LPREs experience these loads many times. Repeated (cyclic) loads lead to the manifestation of processes typical of fatigue, whereby residual stresses and (plastic) deformations are retained and accumulated in the LPRE materials. Numerical investigations using models of the nonstationary thermal and stressed-strained state and the plastic behavior of materials have been performed in order to determine the limiting numbers of loading cycles for the structural materials employed in various units of LPREs. A special computational-experimental procedure is described, which allows these materials to be studied in a stressed-strained state close to that in real LPREs.

Keywords

Heat Exchange Nickel Alloy Model Unit Engineer THERMOPHYSICS Engineering THERMOPHYSICS 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • V. I. Bubnov
    • 1
  • D. V. Isakov
    • 1
  • I. G. Lozino-Lozinskaya
    • 1
  • A. M. Polyanskii
    • 2
  1. 1.Keldysh Research CenterMoscowRussia
  2. 2.Glushko Energomash Scientific Research and Production CorporationKhimki, Moscow oblastRussia

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