Safran Aircraft Engines

Centre National De La Recherche Scientifique

Safran

Ecole Normale Superieure Paris-saclaye

Julien Paul Schneider-Die-Gross

Guillaume Pascal Jean-Charles Gondre

Nicolas Paul Tableau

Yann Didier Simon Marchal

Stéphane Roux

Teddy Fixy

Célia Iglesias Cano

Lucas Antoine Christophe Lauwick

Yanneck Wielhorski

Intisar Belhaj Saad

Arturo Mendoza Quispe

Antonin Branteghem

Carole Onja Rakotoarisoa

Estelle Marie Laure Parra

A system including: a blade including, at the level of the blade root, two portions spaced apart from each other in the transverse direction X so as to provide therebetween a cavity extending downwards in the direction Y of the height of the blade, from a cavity bottom to a cavity opening on the outside, located at the level of the lower end of the blade root, an attachment element of the blade partially engaged inside the cavity, the engaged part having a shape, taken in a plane defined by the directions X and Y, which extends towards the bottom while flaring out in the direction X, the two spaced apart portions of the blade root which are in contact with the flared shape of the attachment element having corresponding flared shapes.

System for attaching a turbomachine blade

An installation for compacting strands or a preform including strands, the strands or the preform including at least a first portion in which the strands are twisted at a first angle and a second portion in which the strands are twisted at a second angle different from the first angle, the installation including a mould which includes the strands or the preform, and wherein the mould has at least a first part in which the first portion of the strands or of the preform is disposed, having a first thickness and a second part in which the second portion of the strands or of the preform is disposed, having a second thickness different from the first thickness.

Adjustment of twist to optimize moulds and the shaping of textile architectures

The invention relates to a fan blade () of a turbomachine () comprising a structure () made of composite material having, within the root () and/or the stilt () of the blade, a first layer () comprising the lower face () and having a first thickness (E) of between 10% and 25% of the total thickness (E), a second layer () comprising the suction face () and having a second thickness (E) of between 10% and 25% of the total thickness (E), and a central layer () extending between the first layer () and the second layer (), the shortening of the warp strands () in the first and second layers () being greater than the shortening of the warp strands () in the central layer ().

Differentiated shortening of strands of the fibrous reinforcement of a fan blade

The invention relates to a fan blade () made of composite material the fibrous reinforcement of which comprises first strands () having a first stiffness, second strands () having a second stiffness and third strands () having a third stiffness lower than the first stiffness and greater than the second stiffness, the blade comprising a first portion () comprising only first strands (), a second portion () comprising only second strands () and a third portion () which is located between the first and second portions () and which comprises both first, second and third strands (); there is a gradual transition of properties at the interface between the different portions ().

Hybridization of the fibers of the fibrous reinforcement of a fan blade

The invention relates to a method for characterizing, from a volume image, a fibrous structure having a three-dimensional weaving between a plurality of warp yarns extending along a first direction and a plurality of weft yarns extending along a second direction perpendicular to the first one, the method comprising: a first processing of the volume image by filtering along a third direction perpendicular to the first and second directions so as to attenuate the periodic patterns along the third direction, obtaining a two-dimensional image corresponding to an intermediate plane along the third direction of the filtered volume image, a second processing of the two-dimensional image by filtering along the first or second direction so as to attenuate the periodic patterns, obtaining a one-dimensional profile representing the positions of warp or weft columns and corresponding to an intermediate line along the first or second direction.

Method of characterizing a woven fibrous structure

Growing community of inventors

Moissy-Cramayel, France

Julien Paul Schneider-Die-Gross