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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Published in | International journal of fatigue Vol. 97; pp. 88 - 97 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
01.04.2017
Elsevier BV |
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0142-1123 1879-3452 |
DOI: | 10.1016/j.ijfatigue.2016.12.018 |