US 12,000,303 B2
Hybridization of the fibers of the fibrous reinforcement of a fan blade
Carole Onja Rakotoarisoa, Moissy-Cramayel (FR); Teddy Fixy, Moissy-Cramayel (FR); Guillaume Pascal Jean-Charles Gondre, Moissy-Cramayel (FR); and Julien Paul Schneider-Die-Gross, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/039,611
Filed by Safran Aircraft Engines, Paris (FR)
PCT Filed Nov. 29, 2021, PCT No. PCT/FR2021/052119
§ 371(c)(1), (2) Date May 31, 2023,
PCT Pub. No. WO2022/117938, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2012586 (FR), filed on Dec. 3, 2020.
Prior Publication US 2024/0093611 A1, Mar. 21, 2024
Int. Cl. F01D 5/14 (2006.01); F01D 5/28 (2006.01)
CPC F01D 5/147 (2013.01) [F01D 5/141 (2013.01); F01D 5/282 (2013.01); F05D 2240/303 (2013.01); F05D 2300/6034 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A turbomachine fan blade comprising a structure made of composite material comprising a fibrous reinforcement obtained by three-dimensional weaving of strands and a matrix wherein is embedded the fibrous reinforcement, the fibrous reinforcement comprising a first portion and a second portion distinct from one another, the strands of the fibrous reinforcement comprising first strands made of a first material having a first stiffness and second strands made of a second material different from the first material and having a second stiffness smaller than the first stiffness, the first portion comprising only first strands, the second portion comprising only second strands,
wherein the fibrous reinforcement also comprises a third portion positioned between the first portion and the second portion, the third portion comprising first strands, second strands and third strands at the same time, the third strands having a third stiffness smaller than the first stiffness and greater than the second stiffness, and wherein, within the third portion, a volume density of the first strands decreases progressively from the first portion in the direction of the second portion, a volume density of the second strands decreases progressively from the second portion in the direction of the first portion.