US 12,227,885 B2
Woven fibrous preform for producing a part from composite material, in particular a turbomachine blade
Bruno Jacques Gérard Dambrine, Moissy-Cramayel (FR); Yann Didier Simon Marchal, Moissy-Cramayel (FR); Dominique Marie Christian Coupe, Moissy-Cramayel (FR); and Marc-Antoine Colot, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/795,438
Filed by SAFRAN, Paris (FR)
PCT Filed Jan. 19, 2021, PCT No. PCT/FR2021/050096
§ 371(c)(1), (2) Date Jul. 26, 2022,
PCT Pub. No. WO2021/152233, PCT Pub. Date Aug. 5, 2021.
Claims priority of application No. 2000808 (FR), filed on Jan. 28, 2020.
Prior Publication US 2023/0093651 A1, Mar. 23, 2023
Int. Cl. F01D 5/28 (2006.01); B29B 11/16 (2006.01); B29C 70/24 (2006.01); B29D 99/00 (2010.01); D03D 25/00 (2006.01); B29L 31/08 (2006.01)
CPC D03D 25/005 (2013.01) [B29B 11/16 (2013.01); B29C 70/24 (2013.01); B29D 99/0025 (2013.01); F01D 5/282 (2013.01); F01D 5/284 (2013.01); B29L 2031/087 (2013.01); F05D 2230/31 (2013.01); F05D 2300/20 (2013.01); F05D 2300/6034 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fibrous preform intended for forming a fibrous reinforcement of a composite material part with fibrous reinforcement densified by a matrix, the fibrous preform being made as a single piece and obtained by three-dimensional weaving of a first plurality of threads or strands extending in a first direction of the composite material part with a second plurality of threads or strands extending in a second direction of the composite material part perpendicular to the first direction, the fibrous preform comprising a first skin, a second skin and a stiffening portion connecting the first skin to the second skin, the stiffening portion being intended to form a stiffening element of the composite material part in the first or second direction, wherein the fibrous preform has an intermediate portion extending at least in the first direction or second direction between two end portions, wherein the stiffening portion comprises, in the intermediate portion, a plurality of non-woven threads or strands extending in at least the first direction or the second direction and which are held together by a plurality of first threads or strands coming from the first skin and a plurality of second threads or strands coming from the second skin, and wherein, in the two end portions, the threads or strands of the stiffening portion are woven with threads or strands of the first or second plurality of threads or strands.