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Journal of Applied Sciences

Year: 2013 | Volume: 13 | Issue: 10 | Page No.: 1895-1900
DOI: 10.3923/jas.2013.1895.1900
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.

Keywords: Offshore wind turbine, blade, damage mechanics and fatigue

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