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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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)|
|Title:||Fatigue of GFRP in Wind Turbine Rotor Blades|
|Number of Pages:||79|
|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|
|DLR - Research area:||Energy|
|DLR - Program:||E SF - Solar research|
|DLR - Research theme (Project):||UNSPECIFIED|
|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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