Fibrous preform comprising a reference pattern
AssigneeSafran Ceramics
InventorsMarie LEFEBVRE, Emilie Chantal Gisèle MENDEZ, Jérémy Paul André BLACHIER, Aline PLANCKEEL
Life of this patent
Estimating the term…
Abstract
A fibrous preform for the manufacture of a part made of composite material, the fibrous preform having a three-dimensional weave includes a plurality of layers of weft yarns and a plurality of layers of warp yarns which extend in a direction perpendicular to the direction of the weft yarns, wherein each weft yarn connects warp yarns of multiple layers, the weft yarns and the warp yarns being woven according to a regular weave, the fibrous preform including, on the surface, one or more reference patterns that extend in a particular direction of the fibrous preform, a reference pattern being created by a local variation in the weave.
Claims11
A fibrous preform for the manufacture of a part made of composite material, the fibrous preform having a three-dimensional weave comprising a plurality of layers of weft yarns and a plurality of layers of warp yarns which extend in a direction perpendicular to the direction of the weft yarns, wherein each weft yarn connects warp yarns of multiple layers, the weft yarns and the warp yarns being woven according to a regular weave,
- wherein the fibrous preform comprises, on a surface, one or more reference patterns that extend in a particular direction of the fibrous preform, a reference pattern being created by a local variation in the weave wherein the reference pattern is chosen amongst:
- a skin yarn having a longer float than the floats of the weft or warp yarns in a pattern of the regular weave;
- and/or
- a plane of symmetry of the weave, and the particular direction is aligned along this plane of symmetry.
(canceled)
(canceled)
A method for weaving a fibrous preform in a regular weave comprising three-dimensionally weaving a plurality of layers of weft yarns and a plurality of layers of warp yarns which extend in a direction perpendicular to the direction of the weft yarns, wherein each weft yarn connects warp yarns of multiple layers,
- wherein the method further comprises one or more steps of locally varying the weave so as to create a reference pattern on the surface of the fibrous preform, the reference pattern extending in a particular direction of the preform wherein the reference pattern is chosen amongst:
- a skin yarn having a longer float than the floats of the weft or warp yarns in a pattern of the regular weave;
- and/or
- a plane of symmetry of the weave, and the particular direction is aligned along this plane of symmetry.
Dependencies are inferred from the claim text.