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Failure Investigation of the Wind Turbine Blade Root Bolt

  • Technical Article---Peer-Reviewed
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Abstract

The failure analysis of the high-strength bolt at root position of the wind turbine blade was conducted to find the cause of fracture. Detailed investigations using several characterization techniques such as stress calculation, chemical composition test, mechanical property test, metallurgical investigation, and fractography analysis were performed to identify the cause of the bolt failure. Based on the theoretical calculation and failure analysis, it could be concluded that the bolt failed by fatigue accelerated by stress concentration while under low temperature. Practical suggestions were also given to avoid similar failures.

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Acknowledgment

This study was supported by the Fundamental Research Funds for the Central Universities under Grant No. FRF-BR-10-007A and No. FRF-AS-09-001A.

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Authors and Affiliations

  1. Department of Applied Mechanics, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Donghuan Liu & Xinchun Shang

Authors
  1. Donghuan Liu
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  2. Xinchun Shang
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Correspondence to Donghuan Liu.

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Liu, D., Shang, X. Failure Investigation of the Wind Turbine Blade Root Bolt. J Fail. Anal. and Preven. 13, 333–339 (2013). https://doi.org/10.1007/s11668-013-9675-4

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  • DOI: https://doi.org/10.1007/s11668-013-9675-4

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