Structural components and methods of manufacturing
A method of manufacturing is presented. The method includes providing a plurality of structural layers comprising a plurality of composite rods, wherein at least one structural layer from the plurality of structural layers is attached to a separation layer. The method further includes stacking the plurality of structural layers, detaching the separation layer from the at least one structural layer, and curing the plurality of structural layers to form a structural component of a wind turbine blade.
1. A method comprising:
(i) providing a plurality of structural layers and a plurality of separation layers, wherein each structural layer among the plurality of structural layers comprises a plurality of composite rods, and is attached to a respective_separation layer among the plurality of separation layers;
(ii) stacking the plurality of structural layers and the plurality of separation layers such that at least one separation layer of the plurality of separation layers is placed between at least two structural layers of the plurality of structural layers;
(iii) detaching the plurality of separation layers from the respective structural layers; and
(iv) curing the plurality of structural layers to form a structural component of a wind turbine blade.
2. The method according to claim 1 , wherein stacking occurs prior to detaching.
3. The method according to claim 2 , wherein detaching the plurality of separation layers from the respective structural layers after stacking is carried out in a manner such that a separation line forms an angle with a longitudinal direction of the structural layer, wherein the angle varies from 30 degrees to 60 degrees.
4. The method according to claim 1 , wherein the composite rods in a respective structural layer are substantially parallel to each other.
5. The method according to claim 1 , wherein the composite rods have cross sectional areas from about 5 square millimeters to about 500 square millimeters and lengths from about 10 meters to about 100 meters.
6. The method according the claim 1 , wherein the composite rods in one structural layer are longer than the composite rods in at least some other structural layer.
7. The method according to claim 1 , wherein at least one composite rod in a respective structural layer is longer than at least some other composite rods in the respective structural layer.
8. The method according to claim 1 , wherein the composite rods each comprise a plurality of fibers bonded by a matrix.
9. The method according to claim 8 , wherein the plurality of fibers comprises carbon fibers, glass fibers, basalt fibers, boron fibers or combinations thereof, and the matrix comprises duroplastics, thermoplastics, or combinations thereof.
10. The method according to claim 1 wherein the composite rods comprise pultruded profiles.
11. The method according to claim 1 wherein the composite rods comprise at least partially wetted composite rods.
12. The method according to claim 11 , wherein the at least partially wetted composite rods comprise a wetting material selected from a group consisting of epoxy resins, phenolic resins and polyurethanes.
13. The method according to claim 1 , further comprising:
infusing a resin in the plurality of structural layers prior to curing the plurality of structural layers.
14. The method according to claim 1 , wherein the structural component of the wind turbine blade comprises a spar cap.
15. A method comprising:
(i) providing a plurality of structural layers and a plurality of separation layers, wherein each structural layer among the plurality of structural layers comprises a plurality of composite rods and is attached to a respective separation layer among the plurality of separation layers;
(ii) stacking the plurality of structural layers and the plurality of separation layers such that at least one separation layer of the plurality of separation layers is placed between at least two structural layers of the plurality of structural layers;
(iii) detaching the plurality of separation layers from the respective structural layers, after stacking; and
(iv) curing the plurality of structural layers to form a structural component.
16. The method according to claim 15 , where the structural component comprises a subsea riser.
17. The method according to claim 15 , wherein the structural component comprises a support structure for a gas turbine installation.
18. The method according to claim 15 , wherein the composite rods comprise at least partially wetted composite rods.