Abstract
A very detailed 2D-solid finite element model is developed representing the load carrying box girder of a
wind turbine blade. Using typical geometrical values for the girder dimensions and public available material
data, the overall cross-sectional behaviour is analysed for a simple compressive line load. The results are
compared with result from similar shell models, which typically are used for practical design. Usually, good
agreement between the shell models and the detailed 2D-solid model is found for the deflections, strains
and stresses in regions with loads from pure bending. However, large differences can exist in regions where
the loading is dominated by shear. It is found that geometrical non-linearity starts to become important
when deflections are of the same order as the laminate thickness.
wind turbine blade. Using typical geometrical values for the girder dimensions and public available material
data, the overall cross-sectional behaviour is analysed for a simple compressive line load. The results are
compared with result from similar shell models, which typically are used for practical design. Usually, good
agreement between the shell models and the detailed 2D-solid model is found for the deflections, strains
and stresses in regions with loads from pure bending. However, large differences can exist in regions where
the loading is dominated by shear. It is found that geometrical non-linearity starts to become important
when deflections are of the same order as the laminate thickness.
| Original language | English |
|---|---|
| Journal | Wind Engineering |
| Volume | 29 |
| Pages (from-to) | 25-32 |
| ISSN | 0309-524X |
| Publication status | Published - 2005 |
Keywords
- FEA model
- Wind turbine blade
- Box girder
- Strain and stress
- Non-linear analysis