Woven fibrous texture

Patent metadata

Field	Value
Publication number	US-12012867-B2
Application number	US-201917416318-A
Country	US
Kind code	B2
Filing date	Nov 29, 2019
Priority date	Dec 21, 2018
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

A fibrous texture intended to form the fibrous reinforcement of a turbomachine part, includes first yarns bonded with second yarns, and at least one vibration damping element of viscoelastic material present in a recess defined by a second de-bonding zone, the de-bonding zone separating, on a portion of the texture, a first surface part of the texture from a second part of the texture formed by a three-dimensional fabric in which the first yarns are bonded with the second yarns, the first surface part of the texture being formed by a unidimensional layer of first yarns or being formed by a two-dimensional fabric in which the first yarns are bonded with the second yarns.

First claim

The invention claimed is:

1. A woven fibrous structure intended to form a fibrous reinforcement of a turbomachine part, comprising first yarns bonded with second yarns, and at least one vibration damping element of viscoelastic material present in a recess defined by a de-bonding zone, said de-bonding zone separating, on a portion of the woven fibrous structure, a first surface part of the woven fibrous structure from a second part of the woven fibrous structure, wherein the first surface part of the woven fibrous structure is formed by a unidimensional layer of first yarns only comprising first yarns extending essentially in a same direction, or by a two-dimensional fabric in which the first yarns are bonded with the second yarns and wherein the second part of the woven fibrous structure is formed by a three-dimensional fabric in which the first yarns are bonded with the second yarns.

2. The woven fibrous structure according to claim 1 , wherein the woven fibrous structure comprises a second vibration damping element of a second viscoelastic material present in a second recess defined by a second de-bonding zone, said second de-bonding zone separating, on a second portion of the structure, a third surface part of the structure from a fourth part of the texture formed by a three-dimensional fabric in which the first yarns are bonded with the second yarns, the third surface part of the structure being formed by a second unidimensional layer of first yarns only comprising first yarns extending essentially in the same direction, or being formed by a second two-dimensional fabric in which the first yarns are bonded with the second yarns.

3. The woven fibrous structure according to claim 1 , wherein each damping element exhibits a shear loss factor greater than or equal to 0.2 over the temperature range comprised between −50° C. and 120° C., the shear loss factor being determined by imposing a sinusoidal shear stress of frequency equal to 100 Hz.

4. The woven fibrous structure according to claim 1 , wherein each vibration damping element comprises an elastomer material.

5. The woven fibrous structure according to claim 4 , wherein each vibration damping element is an elastomer material supported by a fibrous support.

6. The woven fibrous structure according to claim 1 , wherein each vibration damping element has a flat shape.

7. The woven fibrous structure according claim 1 , wherein the first surface part of the woven fibrous structure is formed by a unidimensional layer of first yarns and wherein the first yarns of this unidimensional layer are held in position by a holding element.

8. The woven fibrous structure according to claim 7 , wherein the holding element is hot meltable.

9. The woven fibrous structure according to claim 1 , wherein the first yarns and the second yarns are of carbon fibers.

10. A turbomachine part of composite material comprising a fibrous reinforcement formed by a structure according to claim 1 and a matrix densifying said fibrous reinforcement.

11. The turbomachine part according to claim 10 , wherein the matrix is an organic matrix.

12. The turbomachine part according to claim 10 , wherein the part is a fan part of an aircraft engine.

13. A turbomachine comprising a turbomachine part according to claim 10 .

Assignees

• Safran

Inventors

• Dambrine Bruno Jacques Gérard
• Coupe Dominique Marie Christian
• Tranquart Bastien

Classifications

• F05D2220/36

  specially adapted for the fan of turbofan engines · CPC title

• D10B2505/02

  Reinforcing materials; Prepregs · CPC title

• D03D25/005 Primary

  Three-dimensional woven fabrics · CPC title

• D03D15/275

  Carbon fibres · CPC title

• Y02T50/60

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