Method for manufacturing a composite material part having a cellular structure and corresponding part
AssigneeSafran
InventorsNicolas Pierre Lanfant, Patrick Dunleavy
Life of this patent
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Abstract
A method for manufacturing a composite material part having a cellular structure that includes at least one cell delimited by walls. The method includes supplying at least a first core, providing a web of a first fibrous reinforcement comprising a plurality of long discontinuous fibers randomly distributed in a plane, and producing at least one strip of the first fibrous reinforcement. The method further includes producing a second fibrous reinforcement in the shape of a sock, inserting the first core into the sock, draping the strip around the sock containing the first core, placing the sock containing the first core and the wrapped strip in a mold, and thermocompression.
Claims14
A method for manufacturing a part made of composite material comprising a cellular structure for a turbomachine, the cellular structure comprising at least one cell delimited by walls and the method comprising the steps of:
- supplying at least one first core,
- providing a lap of a first fibrous reinforcement comprising a plurality of discontinuous long fibers randomly distributed in a plane,
- producing at least one strip of the first fibrous reinforcement,
- producing a second fibrous reinforcement in a form of a continuous braided sock and obtained by braiding, the second fibrous reinforcement comprising continuous long fibers, inserting the at least one first core into the sock,
- draping the at least one strip of the first fibrous reinforcement around the sock containing the at least one first core,
- placing an assembly formed by the sock containing the at least one first core and the at least one strip draped around the sock in a mold,
- thermocompressing the assembly installed in the mold, and
- demolding of the thermocompressed assembly by removing the at least one first core and leaving the cell in place of the at least one first core.
A turbomachine part made of composite material having a cellular structure comprising a cell delimited by walls, at least one of the walls including a fibrous reinforcement assembly densified by a matrix, the fibrous reinforcement assembly comprising:
- a first fibrous reinforcement in a form of a strip having randomly distributed discontinuous long fibers and, the strip surrounding an axis of the cell and having an interior face;
- and
- a second fibrous reinforcement of braided continuous long fibers, the second fibrous reinforcement being arranged inside of the first fibrous reinforcement and having an exterior face engaging the interior face of the first fibrous reinforcement,
- wherein the cell is one of a plurality of cells arranged in several rows, the rows being arranged in a first direction, a portion of the first fibrous reinforcement surrounding a first cell of the plurality of cells being adjacent to a portion of the first reinforcement surrounding a second cell of the plurality of cells arranged in the same row.
Dependencies are inferred from the claim text.