Methodology for assessment of remaining life time of wind turbine blades based on damage state

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.​