Thermal fatigue analysis of turbine discs on the base of deformation criterion

•The lifetime prediction of gas turbine discs under complex cyclic loading is analyzed.•Deformation failure criterion for thermal fatigue macrocrack initiation is proposed and verified.•Combined elasto-visco-plastic material model is required for thermal fatigue analysis.•Crack initiation damage acc...

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Bibliographic Details
Published inInternational journal of fatigue Vol. 97; pp. 88 - 97
Main Authors Getsov, L.B., Semenov, A.S., Ignatovich, I.A.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.04.2017
Elsevier BV
Subjects
Computer simulation
Creep
Criteria
Cyclic loads
Damage
Deformation
Fatigue failure
Finite element analysis
Finite element method
Materials fatigue
Plasticity
Thermal cycling
Thermal fatigue
Turbine discs
Turbine disks
Turbines
Thermal fatigue
Turbine discs
Creep
Damage
Plasticity
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Summary:•The lifetime prediction of gas turbine discs under complex cyclic loading is analyzed.•Deformation failure criterion for thermal fatigue macrocrack initiation is proposed and verified.•Combined elasto-visco-plastic material model is required for thermal fatigue analysis.•Crack initiation damage accumulation criterion is verified for five turbine discs.•Crack propagation simulation demonstrates a satisfactory agreement with experiment. The lifetime of turbine discs under complex non-proportional thermo-mechanical cyclic loading is analyzed by means of the direct finite-element simulation of deformation and fracture processes using thermo-elasto-visco-plastic material model and deformation failure criterion. A good agreement is observed in comparison of the obtained number of cycles to macrocrack initiation with experimental results for five turbine discs made from different materials and subjected to various loading conditions.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2016.12.018