Fatigue of fiberglass wind turbine blade materials
Abstract
Fatigue behavior for a variety of generic materials used in wind turbine blades was explored. Coupon testing was carried out under constant amplitude tensile fatigue loading to beyond 10(exp 7) cycles for most materials. Unidirectional materials performed close to expectations despite fiber misalignment. Materials with triaxial (0/plus or minus 45) reinforcement showed greater fatigue sensitivity than expected, but lifetime trends flattened at high cycles. The uniaxial and triaxial materials could be normalized to a single S-N lifetime trend for each case. Results include the effects of differing matrix materials, manufacturing methods, reinforcement structure, and ply terminations.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1992
- Bibcode:
- 1992STIN...9321711M
- Keywords:
-
- Cyclic Loads;
- Fatigue (Materials);
- Fatigue Tests;
- Fiber Composites;
- Glass Fibers;
- Turbine Blades;
- Manufacturing;
- Reinforcing Fibers;
- S-N Diagrams;
- Wind Turbines;
- Structural Mechanics