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Fatigue of GFRP in Wind Turbine Rotor Blades

Kensche, C.W. (1992) Fatigue of GFRP in Wind Turbine Rotor Blades. DLR-Forschungsbericht. 92-17, 79 S.

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Abstract

In the 20-years' life time of wind turbines, the rotor blades achieve more than 10 exponent 8 load cycles. However, for a reliable life time prediction high-cycle fatigue data were missed up to now. Within a CEC programme, therefore relevant investigations on both GI-Ep specimens and spar beams including the load attachment to the hub were carried out. The experiments enclosed sinusoidal one-step tests and the wind energy-specific load sequence WISPER. For the GI-Ep specimens a life time prediction was performed with the linear Miner rule on the basis of a constant amplitude life diagram designed by the fatigue data. Concerning the spar beams it was shown that they safely can withstand maximum strains of more than -0.6 per cent. Frequency response and damping measurements were carried out at certain stages during service life but could not discover an impending failure.

Document Type:Monograph (DLR-Forschungsbericht)
Additional Information: LIDO-Berichtsjahr=1992,
Title:Fatigue of GFRP in Wind Turbine Rotor Blades
Authors:
AuthorsInstitution or Email of Authors
Kensche, C.W.UNSPECIFIED
Date:1992
Number of Pages:79
Status:Published
Keywords:Wind Turbines, Rotor Blades, High-Cycle Fatigue, Coupon Specimens, Spar Beams
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 11:04

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