Wind Turbine Blade Prepreg Defect Inspection
Ultran analyzed several samples of wind turbine blade prepreg for Tecsis Corporation (manufactured by Gurit). Samples provided included a number of different defects including the following:
- dry fibers
- wave defects
- fuzzball defects
- fiber distortion
All marked defects were clearly visible using Ultran’s non-contact ultrasound technology.
The NCU systems produced by Ultran can be directly applied to in-process quality control to identify defects either during prepreg production or prior to layup during wind turbine blade production.
Sample 1 C-Scan – Marked Fiber Distortion (backing on both sides)
Sample 2 C-Scan – Marked Wave Defect (backing on bottom only)
Sample 3 C-Scan – Marked Fuzz Ball (backing on bottom only)
Sample 4 C-Scan – Marked Dry Tow Area Seca (backing on both sides)
Sample 5 C-Scan – (backing on both sides)
Sample 6 C-Scan – Marked Fuzz Ball (backing on bottom only)