US 11,702,961 B2
Casing made of composite material with local variation of thickness
Clément Bourolleau, Moissy-Cramayel (FR); Alexandre Branco, Moissy-Cramayel (FR); Serge Domingues, Moissy-Cramayel (FR); Vincent Pascal Fiore, Moissy-Cramayel (FR); and Anwer Siraj, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/426,901
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Jan. 17, 2020, PCT No. PCT/HR2020/050068
§ 371(c)(1), (2) Date Jul. 29, 2021,
PCT Pub. No. WO2020/157409, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 1900875 (FR), filed on Jan. 30, 2019.
Prior Publication US 2022/0120196 A1, Apr. 21, 2022
Int. Cl. F01D 25/24 (2006.01); B29C 70/32 (2006.01); B29C 70/24 (2006.01); F01D 21/04 (2006.01); B29K 105/08 (2006.01); B29L 31/00 (2006.01)
CPC F01D 25/24 (2013.01) [B29C 70/24 (2013.01); B29C 70/32 (2013.01); F01D 21/045 (2013.01); B29K 2105/0845 (2013.01); B29L 2031/7504 (2013.01); F05D 2240/14 (2013.01); F05D 2300/6012 (2013.01); F05D 2300/6031 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for manufacturing a casing made of composite material for a gas turbine, comprising:
producing a fibrous texture by three-dimensional weaving between a plurality of layers of warp yarns or strands extending in a longitudinal direction and a plurality of layers of weft yarns or strands extending in the lateral direction, the fibrous texture having a strip shape extending in the longitudinal direction over a determined length between a proximal portion and a distal portion and in the lateral direction over a determined width between a first lateral edge and a second lateral edge,
winding the fibrous texture over several superimposed turns on a mandrel of a profile corresponding to that of the casing to be manufactured in order to obtain a fibrous preform of a shape corresponding to that of the casing to be manufactured,
densifying the fibrous preform by a matrix so as to obtain a casing made of composite material having a shape of revolution,
wherein the fibrous texture includes at least one lateral section of variable thickness in which the weft yarns have a size or a count different from the size or the count of the weft yarns of the plurality of layers of weft yarns present in the remainder of the fibrous texture, said at least one lateral section of variable thickness extending over a determined length along the longitudinal direction and over the entire determined width of the fibrous texture along the lateral direction so as to form in the casing at least one portion with a different thickness from the remainder of the casing along a radial direction.