J. Mater. Sci. Technol.

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Finite Element Simulation on Thermal Fatigue of a Turbine Blade with Thermal Barrier Coatings

L. Yang1,2), Q.X. Liu1,2), Y.C. Zhou1,2), W.G. Mao1,2), C. Lu3)   

  1. 1) Key Laboratory of Low Dimensional Materials & Application Technology (Ministry of Education), Xiangtan University, Xiangtan 411105, China
    2) Faculty of Materials, Optoelectronic & Physics, Xiangtan University, Xiangtan 411105, China
    3) Department of Mechanical Engineering, Curtin University, Perth, Western Australia 6845, Australia
  • Received:2012-12-25 Revised:2013-02-18 Online:2014-04-15 Published:2014-04-22
  • Contact: Y.C. Zhou
  • Supported by:

    National Natural Science Foundation of China (Nos. 11002122, 51172192, 11272275 and11002121), the Natural Science Foundation of Hunan Province,
    China (No. 11JJ4003) and the Key Project of Scientific Research Conditions in Hunan Province, China (No. 2012TT2040).

Abstract:

In this paper, a finite element model was developed for a turbine blade with thermal barrier coatings to investigate its failure behavior under cyclic thermal loading. Based on temperature and stress fields obtained from finite element simulations, dangerous regions in ceramic coating were determined in terms of the maximum principal stress criterion. The results show that damage preferentially occurs in the chamfer and rabbet of a turbine blade with thermal barrier coatings and its thermal fatigue life decreases with the increase of thermal stress induced by high service temperature.

Key words: Turbine blade, Thermal barrier coatings, Finite element model, Thermal fatigue, Life prediction