Multilayer woven fibrous structure including a hollow tubular part, production method thereof and composite part comprising same

摘要

A fiber structure made as a single piece by multilayer weaving using a method including weaving warp yarns of at least a first set of layers of warp yarns with weft yarns including at least some that are woven with extra length so as to have warp yarn end portions available that extend beyond the zone of weaving, the warp yarn end portions being returned to be woven with warp yarns by being reinserted in layers of warp yarns, and a hollow, or tubular, portion being formed by looping the first woven set of layers of warp yarns back onto itself and applying traction to the ends of the reinserted weft yarns so that a fiber preform for a part including a hollow portion can be obtained as a single piece.

主权项

1. A method of making a structure woven as a single piece by multilayer weaving and including at least one hollow portion, the method comprising:
weaving warp yarns of at least a first set of layers of warp yarns with weft yarns including at least some weft yarns that are taken over a distance that is greater than a width of the first set of layers of warp yarns measured in a weft direction to have weft yarn end portions available that extend beyond a zone of weaving; returning the end portions of the weft yarns so as to weave the end portions of the weft yarns with warp yarns by reinserting the end portions of the weft yarns in layers of warp yarns; and forming the hollow portion by looping the first woven set of layers of warp yarns back onto itself and applying traction to the ends of the reinserted weft yarns, the hollow portion being entirely defined by a multilayer woven wall including a plurality of layers of yarns interlinked by weaving throughout a thickness of the wall.