Preform for a curved composite stiffener for an axisymmetric part such as a collar

Patent metadata

Field	Value
Publication number	US-10767288-B2
Application number	US-201715454022-A
Country	US
Kind code	B2
Filing date	Mar 9, 2017
Priority date	Sep 10, 2014
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

The present disclosure concerns a preform for a curved composite stiffener for an axisymmetric part such as a shroud, including at least one web and at least one flange curved about an axis of revolution of the preform and defining a substantially “T” or an “I” shaped section. In one form, the preform includes a web and a flange, wherein the web includes a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform, and a plurality of weft yarns oriented radially relative to said axis, and the flange includes a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform, and a plurality of weft yarns substantially parallel to said axis.

First claim

What is claimed is:

1. A preform for a curved composite stiffener for an axisymmetric part comprising at least one web and at least one flange curved about an axis of revolution of said preform and defining at least one of a “T” and an “I” shaped section, wherein:
the at least one web comprises a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform to define web warp yarn layers, and a plurality of weft yarns oriented radially relative to said axis of revolution, wherein the weft yarns are inserted between the warp yarns so as to define a binding zone of the warp yarn layers to each other by the weft yarns; and
the at least one flange comprises a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform to define flange warp yarn layers, and a plurality of weft yarns parallel to said axis of revolution to define an unbinding zone in which the flange warp yarn layers are not bound by the weft yarns.

2. The preform according to claim 1 , wherein the plurality of warp yarns of the at least one flange of the preform have identical lengths, and the plurality of warp yarns of the web of the preform have varied lengths.

3. A curved composite stiffener for an axisymmetric part comprising at least one preform according to claim 1 .

4. An axisymmetric part reinforced by at least one stiffener according to claim 3 .

5. A method for manufacturing the preform according to claim 1 , said method comprising the following steps:
taking-up the warp yarns directly out of a loom onto a take-up mandrel having at least one conical portion and at least one of a conical and a cylindrical portion;
inserting the weft yarns so as to define the binding zone and the unbinding zone of warp yarn layers; and
unfolding an obtained preform to obtain said at least one web and said at least one flange.

Assignees

• Safran Nacelles

Inventors

• Provost Benjamin
• Lorrillard Julien
• Desjoyeaux Bertrand
• Rognant Michel

Classifications

• F01D25/243

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title

• F01D9/00

  Stators · CPC title

• F01D25/24

  Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) · CPC title

• F01D9/04

  forming ring or sector · CPC title

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title