Volume 26 Issue 8
Aug.  2011
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Article Navigation >  Journal of Aerospace Power  > 2011  >  26(8): 1824-1829
YAN Xiao-jun, SUN Rui-jie, DENG Ying, LIU Zhi-na, NIE Jing-xu. Experimental study on fatigue curve law of turbine blade under combined high and low cycle loading[J]. Journal of Aerospace Power, 2011, 26(8): 1824-1829.
Citation: YAN Xiao-jun, SUN Rui-jie, DENG Ying, LIU Zhi-na, NIE Jing-xu. Experimental study on fatigue curve law of turbine blade under combined high and low cycle loading[J]. Journal of Aerospace Power, 2011, 26(8): 1824-1829.
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Experimental study on fatigue curve law of turbine blade under combined high and low cycle loading

  • School of Jet Propulsion, Beijing University of Aeronautics and Astronautics,Beijing 100191,China

  • Received Date: 2010-07-28
  • Rev Recd Date: 2010-11-02
  • Publish Date: 2011-08-28
    Abstract
  • The effect of the high cycle vibration load on the high-temperature fatigue properties of the turbine blade were addressed.Combined high and low cycle fatigue tests were carried out on several blade specimens.The results show that the superposition of high-frequency vibration on low-cycle load can significantly reduce the fatigue life of the blade.It is noteworthy that combined high and low cycle fatigue has two features:great dispersion and no fatigue limit.The former is exhibited by much broader life range than the low cycle fatigue (LCF) test,and the latter indicated by fracture of the blades over 107 high cycles (which is considered as the life limit of the metal materials for the invariable-amplitude fatigue).In addition,the fatigue data suggest a double logarithmic linear relationship between vibration stress level and the combined fatigue life.Further research has found that the law for superalloys operates universally.

     

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