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Research Article
 

Mechanical Analysis of Fatigue Damages on Offshore Wind Turbine Blades



X.H. Dong, T.J. Yuan and R.H. Ma
 
ABSTRACT

Aiming at the structural characteristics and main damage types, a fatigue damage model of blade was proposed based on theory of damage mechanics. Combining with Talerja vector damage model, a fatigue damage vector model of the interface and the single plate matrix and plane tense-strain constitutive relation was deduced on basis of fatigue damage of single plate. The analysis results of this model show that the single plate cracks first in 90° matrix, then 45° matrix and delamination appears at the 90/45° interface, finally fiber fracture occurs. Delamination is the dominate damage mode in high-circle fatigue. The results correspond well with experimental observation which proves the feasibility of this model. The evolution rule of fatigue damage was proposed to further explicate the fatigue damage mechanism of blades.

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  How to cite this article:

X.H. Dong, T.J. Yuan and R.H. Ma, 2013. Mechanical Analysis of Fatigue Damages on Offshore Wind Turbine Blades. Journal of Applied Sciences, 13: 1895-1900.

DOI: 10.3923/jas.2013.1895.1900

URL: https://scialert.net/abstract/?doi=jas.2013.1895.1900

REFERENCES
Ciang, C.C., J.R. Lee and H.J. Bang, 2008. Structural health monitoring for a wind turbine system: A review of damage detection methods. Measur. Sci. Technol., 19: 1-20.

Fu, C. and Y.R. Wang, 2011. Damage evolution prediction of wind turbine blades. Acta Eng. Solaris Sin., 32: 143-148.

Li, M.M., L.P. Li, F.H. Jin and H.H. Tan, 2012. Modal strain energy theory and application for wind turbine blade damage recognition. Renewab. Energy Resour., 30: 27-31.

Sorensen, B.F., E. Jorgensen, C.P. Debel, F.M. Jensen, H.M. Jensen, T.K. Jacobsen and K.M. Halling, 2004. Improved design of large wind turbine blade of fibre composites based on studies of scale effects (Phase 1): Summary report. (Riso-R Report), Riso National Laboratory, Denmark.

Sorensen, B.F., L. Lading, P. Sendrup, M. McGugan and C.P. Debel et al., 2002. Fundamentals for remote structural health monitoring of wind turbine blades: A preproject. Riso-R-1336(EN) Report, Riso National Laboratory, Denmark.

Sundaresan, M.J., M.J. Schulz and A. Ghoshal, 2002. Structural health monitoring static test of a wind turbine blade. Subcontract Report NREL/SR-500-28719, National Renewable Energy Laboratory, USA.

Talerja, R., 1987. Fatigue of Composite Materials. Technomic Publishing Company, Lancaster.

Talreja, R., 1987. Modeling of Damage Development in composite using internal variables concepts. Proceedings of the ASME Winter Annual Meeting on Damage Mechanics in Composites, December 13-18, 1987, USA., pp: 11-16.

Talreja, R., 1989. Continuum Modeling of the Development of Intralaminar Cracking in Composite Laminates. In: Advances in fracture Research, Salama, K. (Ed.). Pergamon Press, USA., ISBN-13: 9780080343419.

Xu, Y.X. and C.D. Zhang, 2009. Strain response fractal characteristic and damage identification of a wind turbine blade. Mechan. Sci. Technol. Aerospace Eng., 28: 108-116.

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