Methodology for assessment of remaining life time of wind turbine blades based on damage state (ReLife)
Project description
We will develop a methodology to determine the remaining useful life of wind turbine rotor blades accounting for the damage state of the individual blade and thus provide a solution for safe service life extension. The methodology combines non-destructive testing methods (characterization of current damage) and fracture mechanics models (prediction of future damage growth).
The approach is particularly useful for turbine blades that approach their original design life; blades with severe damages can be identified and taken down or repaired, while blades without significant damage can have their service life extended by say 15-20 years. A longer service life leads to a larger energy production which benefits turbine owners and the society. Information of damage in blades will enable blade manufactures to make better designs for future wind turbine blades.
The project will demonstrate the proposed methodology on a series of blades to be tested to failure under cyclic loading.
The approach is particularly useful for turbine blades that approach their original design life; blades with severe damages can be identified and taken down or repaired, while blades without significant damage can have their service life extended by say 15-20 years. A longer service life leads to a larger energy production which benefits turbine owners and the society. Information of damage in blades will enable blade manufactures to make better designs for future wind turbine blades.
The project will demonstrate the proposed methodology on a series of blades to be tested to failure under cyclic loading.
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