Connection between composites with non-compatible properties and method for preparation
AssigneeVestas Wind System A/S
InventorsAnton Bech, Frank A. Hoelgaard Hahn
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Abstract
A connection between composites (10, 12) with non-compatible properties and a method of preparing of such connections are provided. The composites comprise first and second type fibres, respectively, as well as resin. The connection comprises a transition zone (52) between the composites (10, 12) having a layered structure. The transition zone may optionally comprise a transition member and the transition member may optionally be integrated with one or more of the composites. Examples of non-compatible properties where the present connection will be appreciated are great differences in stiffness, e.g. Young's modulus, or in coefficient of thermal expansion.
Claims42
A connection for a wind turbine blade between two composites, said connection comprising:
- a first composite member comprising first fibres and a first resin;
- a second composite member comprising second fibres and a second resin, the second fibres being different than the first fibres;
- and
- a connection between the first and the second composite members comprising a transition zone having a layered structure,
- wherein the transition zone comprises layers comprising the first fibres and the second fibres, each of said layers having substantially the same fibre composition as either the first composite member or the second composite member;
- and
- in a part of the transition zone, layers comprise substantially the first fibres from the first composite member extending beyond the layers of fibres comprising substantially the second fibres of the second composite member.
A transition member having an area enhanced for connecting to a first composite member and an area enhanced for connecting to a second composite member, said transition member comprising two layers or sheets comprising fibres, one of the layers comprising fibres substantially the same as fibres comprising the first composite member and another of the layers comprising fibres having substantially the same fibres comprising the second composite member, wherein the two layers are partially interlaced, and the fibres comprising the first composite member are different than the fibres comprising the second composite member.
A connection for connecting two relatively incompatible composite members, the connection comprising:
- a first composite member comprising first fibres and a first resin,
- a second composite member comprising second fibres and a second resin, the first composite member and the second composite member possessing different physical properties, wherein said connection comprises a transition zone having a layered structure,
- wherein the transition zone comprises layers comprising fibres, each of said layers having substantially the same fibre composition as either the first composite member or the second composite member, and
- in a part of the transition zone, layers comprising fibres having substantially the same fibre composition as one of the composite members extend beyond the layers of fibres comprising substantially the same fibre composition as the other composite member.
Dependencies are inferred from the claim text.