Full-Field Dynamic Strain on Wind Turbine Blade Using Digital Image Correlation Techniques and Limited Sets of Measured Data From Photogrammetric Targets

Wind turbine blades are subjected to dynamic loadings in operation (as well as in the certification process) that result in dynamic stresses and strains that are important to understand. Generally, only a small number of strain gages are used in the certification process and even fewer, if any at all, are installed for operational measurements. Recent advances in digital image correlation (DIC) and digital photogrammetry (DP) have allowed for new opportunities for blade inspection and structural health monitoring.

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