Evaluation of Creep Damage in Some Major Components of Steam Turbine

  • J. Matoušek
Conference paper
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Summary

The paper presents a finite element analysis of some physically non-linear problems of material creep in application for machine parts operating under creep conditions. The numerical solution is based on a statistically stable analytical relationship for plastic deformation which expresses all three stages of creep process. Por the variable load and/or temperature modelling at multiaxial state of stress the equivalence of local damage according to the hypothesis of linear cumulation of damage is used. The suggested method is suitable for creep calculations of geometrically complicated bodies with respect of local damage at the points of deformation and stress concentration. Physically real boundary conditions were included in the FEM numerical technique. Dispersion of the creep tests is accounted for and the numerical results are compared with measurements.

Keywords

Steam Strain Hardening Casing 

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References

  1. 1.
    Matoušek, J.; Drahý, Z. et al.: Creep Damage in Rotors of škoda Steam Turbines. Monographs and Memoranda No.40, Nat. Res.Inst. for Machine Design, Praha 1990 (in print).Google Scholar
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    Wilson, E.A.: A Design Oriented Approach to Creep and Plasticity in Finite Elements Programs. Journ. of Enging for Industry 93 (1971) 793–798.CrossRefGoogle Scholar
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    Matoušek, J.; Švarc, M.; Valenta, J.; Löbl, K.; Bína, V.: Evaluation of Creep Damage in Some Major Components of Power Generator. ISIJ International 30 (1990) 451–456, Tokyo.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag, Berlin Heidelberg 1991

Authors and Affiliations

  • J. Matoušek
    • 1
  1. 1.National Research Institute of Machine DesignPragueCzech Republic

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