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Fibrous structure and component made of composite material incorporating such a structure

A fiber structure and component technology, applied in the field of composite material manufacturing components, can solve the problem of molding and densification of parts that are difficult to form the root of the blade

Pending Publication Date: 2020-07-24
SAFRAN CERAMICS SA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Furthermore, it was found to be difficult to mold and densify the part of the preform where the blade root is to be formed, especially because the tolerances of the contour of the bulb-shaped root are very small (of the order of tenths of a millimeter), and because this part of the blade presents stringent requirements in terms of mechanical properties, assuming that the root of the blade concentrates most of the forces applied to the blade

Method used

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  • Fibrous structure and component made of composite material incorporating such a structure
  • Fibrous structure and component made of composite material incorporating such a structure
  • Fibrous structure and component made of composite material incorporating such a structure

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Embodiment Construction

[0037]The invention is generally applicable to the manufacture of fibrous structures suitable for constituting fibrous reinforcements or preforms for the manufacture of composite material components, in particular aeroengine blades, the components being obtained by densifying the fibrous structure with a matrix. For composites used at relatively low temperatures, typically up to 300° C., when making thermal structural composites, the matrix is ​​typically a resin or a refractory material such as carbon or ceramic, eg silicon carbide.

[0038] The fiber structure of the present invention is obtained by three-dimensional weaving or multilayer weaving.

[0039] The terms "three-dimensional weaving" or "3D weaving" are used herein to denote weaving in which at least some of the warp yarns interconnect weft yarns over multiple layers of weft yarns.

[0040] The term "multi-layer weave" is used herein to refer to a 3D weave having multiple layers of weft yarns, wherein the base weav...

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PUM

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Abstract

The invention relates to a fibrous structure (200) comprising a plurality of weft layers and of warp layers bound together by the multi-layer three-dimensional weaving, the fibrous structure (200) comprising at least first (203) and second (204) parts which are adjacent in the warp direction, the first part (203) having, in a direction perpendicular to the warp and weft directions, a thickness that is greater than the thickness of the second part (204), characterized in that the first part (203) comprises, at its heart (2031), at least one fibrous texture (ML) obtained by three-dimensional weaving of the warp and weft layers in the form of a Mock Leno weave, the said at least one texture (ML) being present between facings (2032; 2033) which are present at the surface of the first part (203) and being connected to the facings (2032; 2033) by warp threads (C3; C16) belonging to the said facings which are diverted locally into the said texture.

Description

Background technique [0001] The present invention relates to the fabrication of components from composite materials, and more particularly to the fabrication of fiber reinforced structures for such components by three-dimensional (3D) or multilayer weaving. [0002] The field of application of the invention is the manufacture of components from structural composite materials, ie components having a fiber-reinforced structure densified by a matrix. Composite materials enable the part to be manufactured to have a lower overall weight than the same part when it is manufactured from metallic material. [0003] The invention relates more particularly to parts made of composite material comprising one or more portions of localized extra thickness, for example applied to the root of an air motor blade, corresponding to areas of large thickness variation in the composite part. For components manufactured from composite materials with varying thicknesses, the variation in thickness is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D03D25/00D03D41/00B29C70/24
CPCB29C70/24D03D25/005D03D41/004B29D99/0025B29B11/16B29C70/38B29C70/48B29K2063/00B29K2105/0845B29K2307/04B29K2309/02B29L2031/082D10B2101/08D10B2101/12
Inventor 玛丽·列斐伏尔弗朗索瓦·查勒克斯多米尼克·库普布罗克·吉尔伯森朱莉-安妮·布切特
Owner SAFRAN CERAMICS SA