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Fatigue life prediction of fiber reinforced composites turbine shaft structure[J]. Journal of Aerospace Power, 2017, 32(4): 769-779. doi: 10.13224/j.cnki.jasp.2017.04.001
Citation: Fatigue life prediction of fiber reinforced composites turbine shaft structure[J]. Journal of Aerospace Power, 2017, 32(4): 769-779. doi: 10.13224/j.cnki.jasp.2017.04.001
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Fatigue life prediction of fiber reinforced composites turbine shaft structure

doi: 10.13224/j.cnki.jasp.2017.04.001
  • Received Date: 2015-07-24
  • Publish Date: 2017-04-28
    Abstract
  • The method of estimating the fatigue life of the low pressure turbine shaft structure made of continuous fiber reinforced composite material under given low cycle loading was studied. Structural characteristics of continuous fiber reinforced composites were considered, low cycle fatigue life prediction method based on the local stress strain theory was studied, and the efficiency of the method was proved. A certain type of low pressure turbine shaft of the engine was selected for reference, the maximum stress, strain and fatigue life were calculated with the method. Result showed that, the fatigue life value of the 45° angle of composites layer was the biggest within the scope of the 0°-90°; when the thickness of the metal remained unchanged, the composite material fatigue life of outer metal and the first layer increased with the increasing thickness of the composites; when the shaft wall thickness was 6 mm, if reducing the thickness of the composites layer, and increasing the inner or the outer metal coating thickness, the structure fatigue life decreased as composites layer thickness decreased; the life of the outer metal coating was longer than the fatigue life of the first layers composite materials.

     

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