The Crack Propagation and Life Estimation of Turbine Disk

  • Hong Qilin
Conference paper


Turbine disk is an important part of a jet engine. It has been demonstrated by practice that the cracks were initiated frequently at the slot bottom in a turbine disk, but the crack propagation was slowly, when the engine was operated. There are some important questions which should be answered. That is, after the cracks are initiated in the turbine disk, whether the disk could be used continuously with safety. If it could be used, how long is the operating duration? For the application of damage tolerance concepts, it is necessary to estimate the number of load cycles required to propagate the crack from the initial size to the critical size. In this paper, we take the crack propagation and lifetime estimation of an existing turbine disk as an example. An estimation method of fracture mechanics combined with probability statistics is proposed.


Residual Stress Stress Intensity Factor Stress Corrosion Fatigue Crack Propagation Crack Propagation Rate 
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  1. 1.
    Nie Jingxu, Li Jian, Nie cong, “The Analysis of transient temperature field and stress field of turbine disk and its slot bottom”, J. of BIAA. March, 1982.Google Scholar
  2. 2.
    Nie Jingxu, Nie cong, Hong Qilin, “Calculation and analysis of Mode I crack in turbine disk by means of linear superposition principle”, J. of BIAA. July, 1981.Google Scholar
  3. 3.
    Nie Jingxu, Hong Qilin, Nie cong, “Determination of the critical crack length aIC in turbine discs”, International symposium on Fracture Mechanics, November, 1983.Google Scholar
  4. 4.
    Nie Jinxu, Hong Qilin “The Analysis of crack propagation law at slot bottom in turbine disk.” ASME, 85–1GT-91. September, 1985.Google Scholar

Copyright information

© Springer Japan 1986

Authors and Affiliations

  • Hong Qilin
    • 1
  1. 1.Department of Jet PropulsionBeijing Institute of Aeronautics and AstronauticsBeijinChina

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