Manufacturing Defects in Wind Turbine Blades

Manufacturing defects in wind turbine blades are

Dry Spots

It can be dry spots and even large whitish areas, which show the lack of resin in the laminate.
Glass fibers are dry because they have not been properly impregnated with resin.

Excess Resin

Regions with excess resin are more fragile and can crack more easily, in addition to making the
laminate heavier and compromising its mechanical performance when the blade is in operation.


Delamination is a detachment between the reinforcement layers (generally glass fabric) and the
matrix (generally epoxy resin), leaving the region with a whitish appearance.

Juliana Lucena, Dr. in Energy (UFPE), Production Engineer (USP), Professor at the Federal Network

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