Fracture analysis of wind turbine main shaft

Zhang, Zhanqi, Yin, Zhongjun, Han, Tian, & Tan, Andy C.C. (2013) Fracture analysis of wind turbine main shaft. Engineering Failure Analysis, 34, pp. 129-139.

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Abstract

Shaft fracture at an early stage of operation is a common problem for a certain type of wind turbine. To determine the cause of shaft failure a series of experimental tests were conducted to evaluate the chemical composition and mechanical properties. A detail analysis involving macroscopic feature and microstructure analysis of the material of the shaft was also performed to have an in depth knowledge of the cause of fracture. The experimental tests and analysis results show that there are no significant differences in the material property of the main shaft when comparing it with the Standard, EN10083-3:2006. The results show that stress concentration on the shaft surface close to the critical section of the shaft due to rubbing of the annular ring and coupled with high stress concentration caused by the change of inner diameter of the main shaft are the main reasons that result in fracture of the main shaft. In addition, inhomogeneity of the main shaft micro-structure also accelerates up the fracture process of the main shaft. In addition, the theoretical calculation of equivalent stress at the end of the shaft was performed, which demonstrate that cracks can easily occur under the action of impact loads. The contribution of this paper is to provide a reference in fracture analysis of similar main shaft of wind turbines.

Impact and interest:

3 citations in Scopus
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4 citations in Web of Science®

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ID Code: 63929
Item Type: Journal Article
Refereed: Yes
Additional Information: This paper is supported by “the Fundamental Research Funds for the Central Universities”. (Grant No.FRF-TP-12-048A).
Keywords: Wind turbine, Main shaft, Fracture analysis, Experimental testing
DOI: 10.1016/j.engfailanal.2013.07.014
ISSN: 1350-6307
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier Ltd.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Engineering Failure Analysis. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Engineering Failure Analysis, [Volume 34, (December 2013)] DOI: 10.1016/j.engfailanal.2013.07.014
Deposited On: 04 Nov 2013 22:24
Last Modified: 02 Jan 2016 06:30

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