FR2830482A1 - Carbon fibre reinforced structure has force transmission elements in shape of tubes connected to structure by flanges between layers - Google Patents
Carbon fibre reinforced structure has force transmission elements in shape of tubes connected to structure by flanges between layers Download PDFInfo
- Publication number
- FR2830482A1 FR2830482A1 FR0212227A FR0212227A FR2830482A1 FR 2830482 A1 FR2830482 A1 FR 2830482A1 FR 0212227 A FR0212227 A FR 0212227A FR 0212227 A FR0212227 A FR 0212227A FR 2830482 A1 FR2830482 A1 FR 2830482A1
- Authority
- FR
- France
- Prior art keywords
- force transmission
- transmission elements
- carbon fiber
- axial
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/222—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being shaped to form a three dimensional configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Moulding By Coating Moulds (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
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La présente invention concerne une structure renforcée par des fibres de carbone ayant un ou plusieurs éléments de transmission de force. The present invention relates to a structure reinforced with carbon fibers having one or more force transmission elements.
Pour fixer des structures supplémentaires à des composants liés par des fibres de renforcement en carbone ou autres matières, on procède fréquemment par collage ou encore on les fixe par vissage ou rivetage. L'inconvénient de ces techniques connues est soit d'affaiblir la matière de la pièce en utilisant des vis ou des rivets, soit d'avoir une liaison par la forme, insuffisante dans le cas de la technique du collage. To attach additional structures to components bound by reinforcing fibers made of carbon or other materials, they are frequently bonded or fixed by screwing or riveting. The disadvantage of these known techniques is either to weaken the material of the part using screws or rivets, or to have a connection by the form, insufficient in the case of the technique of gluing.
La présente invention a pour but de développer des structures renforcées par des fibres de carbone planes ou courbes, comportant des éléments permettant de transmettre ou d'induire des efforts. The present invention aims to develop structures reinforced by flat or curved carbon fibers, comprising elements for transmitting or inducing efforts.
Ce problème est résolu selon l'invention par une structure du type défini ci-dessus, caractérisée en ce que les éléments de transmission de force sont tubulaires ou en forme de profil creux avec une section de profil s'écartant d'une section annulaire, les éléments de transmission de force sont réalisés chacun d'un ou plusieurs tubes tressés en fibres de carbone engagés l'un sur l'autre, les tubes tressés en fibres de carbone sont élargis chaque fois à une extrémité pour former une bride et les brides sont intégrées lors de la fabrication de la forme préalable de la structure renforcée de fibres de carbone entre deux nappes multi-axiales dans la structure renforcée de fibres de carbone, et après imprégnation et prise de la structure, on a une liaison par la forme dans la structure renforcée par des fibres de carbone. This problem is solved according to the invention by a structure of the type defined above, characterized in that the force transmission elements are tubular or in the form of a hollow profile with a section of profile deviating from an annular section, the force transmission elements are each made of one or more braided carbon fiber tubes engaged one upon the other, the carbon fiber braided tubes are each extended at one end to form a flange and the flanges are integrated during the manufacture of the prior form of the carbon fiber reinforced structure between two multi-axial layers in the carbon fiber reinforced structure, and after impregnation and taking of the structure, there is a connection by the form in the structure reinforced by carbon fibers.
La solution selon l'invention repose sur le fait que les éléments pour induire les efforts sont réalisés par un ou plusieurs tubes en fibres de carbone tressés. Les tubes tressés sont élargis à une extrémité pour former une bride. Par cette bride, les éléments pour induire les efforts sont intégrés par une liaison par la forme entre les moyens multiples de la structure multi-axiale renforcée par des fibres de carbone. The solution according to the invention is based on the fact that the elements for inducing efforts are made by one or more braided carbon fiber tubes. The braided tubes are widened at one end to form a flange. By this flange, the elements for inducing the forces are integrated by a connection by the form between the multiple means of the multi-axial structure reinforced by carbon fibers.
L'insertion d'éléments de transmission d'efforts entre les couches multiaxiales se fait lors de la fabrication de la forme préalable de la structure renforcée par des fibres de carbone. The insertion of force transmission elements between the multiaxial layers is done during the manufacture of the prior form of the structure reinforced by carbon fibers.
Selon l'invention, dans une structure renforcée de fibres de carbone ayant plus de deux nappes multi-axiales, les éléments de transmission de force sont intégrés avec leur bride entre les deux nappes multiaxiales intérieures. Mais on peut aussi prévoir la bride entre deux nappes According to the invention, in a reinforced carbon fiber structure having more than two multi-axial plies, the force transmission elements are integrated with their flange between the two inner multiaxial plies. But we can also predict the flange between two layers
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multi-axiale ou, dont au moins une nappe multi-axiales fait partie d'une nappe multi-axiale située plus à l'extérieur. multi-axial or, of which at least one multi-axial sheet is part of a multi-axial sheet located further outside.
Grâce à l'utilisation de tubes en fibres de carbone tressés, les éléments pour induire ou transmettre les efforts se réalisent avec une mise en oeuvre réduite en outil et en temps. La souplesse des tubes tressés permet avantageusement d'intégrer des éléments de transmission d'efforts dans des structures de forme complexe renforcées par des fibres de carbone. Vis-à-vis de la fixation d'éléments de transmission d'efforts par un collage effectué à la suite des éléments à la surface de la structure renforcée par des fibres de carbone, la solution selon l'invention offre l'avantage de nécessiter une étape de procédé en moins car les éléments induisant les efforts, selon l'invention sont intégrés dans la structure renforcée de fibres de carbone au moment de la réalisation de la forme préalable. Un autre avantage vis-à-vis des éléments de transmission d'efforts, collés, est que les éléments selon l'invention pour induire les efforts permettent de transmettre des forces plus importantes à la structure CFK. Thanks to the use of braided carbon fiber tubes, the elements for inducing or transmitting the forces are realized with a reduced implementation in tool and time. The flexibility of the braided tubes advantageously makes it possible to integrate force transmission elements in structures of complex shape reinforced by carbon fibers. With respect to the attachment of force transmission elements by gluing performed following the elements on the surface of the structure reinforced by carbon fibers, the solution according to the invention offers the advantage of requiring a process step less because the stress inducing elements according to the invention are integrated into the carbon fiber reinforced structure at the time of the realization of the previous form. Another advantage vis-à-vis the force transmission elements, glued, is that the elements according to the invention to induce the forces can transmit greater forces to the CFK structure.
La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un exemple de réalisation de l'invention représenté dans les dessins dans lesquels : - la figure 1 montre une partie d'une structure renforcée par des fibres de carbone avec un élément de transmission de force selon l'invention, - la figure 2 montre le principe de construction de la forme préalable pour une structure renforcée par des fibres de carbone avec des élé- ments selon l'invention pour induire les forces, - la figure 3 montre la construction de la forme préalable au moment où cette forme préalable est engagée sur le corps de support 10, son ex- trémité en appui étant en forme de bride 8 par déformation du tube tressé en fibres de carbone. The present invention will be described below in more detail with the aid of an exemplary embodiment of the invention shown in the drawings in which: - Figure 1 shows part of a structure reinforced by carbon fibers With a force transmission element according to the invention, FIG. 2 shows the principle of construction of the prior shape for a structure reinforced by carbon fibers with elements according to the invention for inducing the forces. FIG. 3 shows the construction of the prior shape at the moment when this pre-form is engaged on the support body 10, its supporting end being in the form of a flange 8 by deformation of the braided tube made of carbon fibers.
La structure renforcée par des fibres de carbone 1 représentée partiellement à la figure 1 comporte quatre nappes multi-axiales 2, 3,4, 5, superposées. Un élément de transmission de force 6 intégré à cet endroit à la structure renforcée de fibres de carbone 1 est par exemple un tube de section circulaire de longueur limitée. Ce tube 7 est tressé en fibres de carbone. L'exemple de réalisation présenté correspond à une structure à une couche pour l'élément de transmission d'efforts 6 qui, suivant l'épaisseur de paroi requise, peut être remplacée par une structure à plusieurs couches ; pour cela, on engage deux ou plusieurs tubes 7 tres- sés en fibres de carbone les uns sur les autres. The structure reinforced with carbon fibers 1 partially represented in FIG. 1 comprises four multiaxial layers 2, 3, 5, 5 superimposed. A force transmission element 6 integrated at this point to the carbon fiber reinforced structure 1 is for example a circular section tube of limited length. This tube 7 is braided in carbon fibers. The exemplary embodiment presented corresponds to a one-layer structure for the force transmission element 6 which, depending on the required wall thickness, can be replaced by a multilayer structure; for this purpose, two or more tubes 7 made of carbon fibers are engaged one on the other.
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L'élément de transmission de force 6 comporte à son extrémité intégrée dans la structure renforcée de fibres de carbone, une bride 8 obtenue par déformation. La bride 8 maintient l'élément de transmission de force 6 entre les nappes multi-axiales internes 3,4. The force transmission element 6 has at its end integrated in the reinforced carbon fiber structure, a flange 8 obtained by deformation. The flange 8 holds the force transmission element 6 between the internal multi-axial plies 3,4.
En variante à l'élément de transmission de force 6 représenté ci-dessus, on peut également réaliser les tubes tressés avec des sections tubulaires autres qu'une section circulaire car les tubes tressés sont très souples ; on peut par exemple avoir un profil creux de section rectangulaire. As an alternative to the force transmission element 6 shown above, it is also possible to make the braided tubes with tubular sections other than a circular section because the braided tubes are very flexible; one can for example have a hollow profile of rectangular section.
Dans une structure renforcée de fibres de carbone on peut également intégrer de cette manière plusieurs éléments de transmission de force 6 si cela est nécessaire. Dans la structure renforcée de fibres de carbone décrite ci-après à l'aide de la figure 2, on a intégré par exemple deux éléments de transmission de force 6. A la place de l'exemple de réalisation décrit ci-dessus, la structure renforcée de fibres de carbone peut être composée de plus ou moins de quatre nappes multi-axiales ; on peut également envisager un nombre impair ; il faut utiliser au moins deux nappes entre lesquelles on intègre la bride de l'élément de transmission de force. In a structure reinforced with carbon fibers it is also possible to integrate in this manner several force transmission elements 6 if this is necessary. In the carbon fiber reinforced structure described hereinafter with the help of FIG. 2, for example two force transmission elements 6 have been integrated. In the place of the embodiment described above, the structure Carbon fiber reinforced can be composed of more or less than four multi-axial layers; we can also consider an odd number; it is necessary to use at least two plies between which the flange of the force transmission element is integrated.
La figure 2 montre la structure d'une forme préalable (encore appelée préforme) pour une structure renforcée par des fibres de carbone avec des éléments de transmission de force selon l'invention. La construction de la forme préalable se fait sur un dispositif de mise en place 9 comportant par exemple deux organes de support 10 de forme cylindrique, en saillie, pour réaliser selon l'invention deux éléments de transmission de force. La section des organes de support cylindriques 10 est définie en fonction de la section intérieure de l'élément de transmission de force, tubulaire ou profilé. Figure 2 shows the structure of a prior shape (also called preform) for a structure reinforced by carbon fibers with force transmission elements according to the invention. The construction of the prior form is done on a setting device 9 comprising for example two support members 10 of cylindrical shape, projecting, to achieve according to the invention two force transmission elements. The section of the cylindrical support members 10 is defined according to the inner section of the force transmission element, tubular or profiled.
Dans cet exemple de réalisation, on a deux nappes multiaxiales 2,3 sous la bride 8 de l'élément de transmission de force 6 et deux nappes multi-axiales 4,5 au-dessus de celles-ci. Dans les nappes multiaxiales 2-5, dans les positions prévues pour les éléments de transmission de force on a découpé chaque fois deux ouvertures circulaires 11. In this exemplary embodiment, there are two multiaxial plies 2,3 under the flange 8 of the force transmission element 6 and two multiaxial plies 4,5 above them. In the multiaxial plies 2-5, in the positions provided for the force transmission elements, two circular openings 11 have been cut each time.
Le diamètre des ouvertures 11 des nappes multi-axiales inférieures est par exemple défini suivant le diamètre des organes d'appui
10 pour que ceux-ci puissent juste traverser les orifices. Le diamètre des orifices supérieurs 11 est choisi par exemple en fonction du diamètre extérieur du ou des tubes tressés en fibres de carbone 7, engagés l'un sur The diameter of the openings 11 of the lower multi-axial layers is for example defined according to the diameter of the support members
10 so that they can just go through the holes. The diameter of the upper orifices 11 is chosen for example as a function of the outside diameter of the carbon fiber braided tube or tubes 7, engaged one on
<Desc/Clms Page number 4><Desc / Clms Page number 4>
l'autre. En variante, le diamètre des ouvertures 11 peut également être légèrement supérieur aussi longtemps que la bride 8 de l'élément de transmission de force 6 est encore tenue suffisamment entre les nappes multi-axiales. the other. Alternatively, the diameter of the openings 11 may also be slightly greater as long as the flange 8 of the force transmission element 6 is still sufficiently held between the multi-axial plies.
La figure 3 montre la construction de la forme préalable au moment où les tubes tressés avec une extrémité en forme de bride 8 sont engagés sur les organes de support 10. Les nappes multi-axiales inférieures 2,3 sont placées à ce moment sur le dispositif de mise en place 9 et les tubes tressés 7 sont emmanchés sur les organes de support 10 traversant les ouvertures 11 des nappes multi-axiales 2,3. Lorsqu'on emmanche les tuyaux tressés souples 7, en exerçant une poussée suffisante, on élargit l'extrémité inférieure de chaque tube tressé 7 et on l'écarte pour former la bride 8. FIG. 3 shows the construction of the pre-form at the moment when the braided tubes with a flange-shaped end 8 are engaged on the support members 10. The lower multi-axial plies 2,3 are placed at this moment on the device 9 and the braided tubes 7 are fitted on the support members 10 passing through the openings 11 of the multi-axial plies 2,3. When the flexible braided hoses 7 are fitted with sufficient thrust, the lower end of each braided tube 7 is widened and moved apart to form the flange 8.
Avant d'élargir la bride du tube tressé en fibres de carbone 7, celui-ci peut être maintenu réuni par un moyen de liaison de tube ou un ruban que l'on décroche pour que seulement la future zone formant la bride s'élargisse lors de la mise en place. Before widening the flange of the carbon fiber braided tube 7, it can be held together by a tube connection means or a tape that is taken off so that only the future zone forming the flange widens when of setting up.
Ensuite, on place les deux nappes multi-axiales supérieures 4,5 avec leurs orifices 11 par-dessus les tubes tressés 7 emmanchés et on imprègne la forme préalable de manière usuelle avec de la résine puis on fait prendre la structure renforcée de fibres de carbone 1. Then, the two upper multi-axial plies 4,5 are placed with their orifices 11 over the braided tubes 7 fitted and the preform is impregnated in the usual manner with resin and the carbon fiber-reinforced structure is then taken. 1.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10148950A DE10148950C2 (en) | 2001-10-04 | 2001-10-04 | CFRP structure with force introduction elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2830482A1 true FR2830482A1 (en) | 2003-04-11 |
| FR2830482B1 FR2830482B1 (en) | 2006-07-07 |
Family
ID=7701362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0212227A Expired - Fee Related FR2830482B1 (en) | 2001-10-04 | 2002-10-03 | CARBON FIBER REINFORCED STRUCTURE HAVING FORCE TRANSMISSION ELEMENTS |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE10148950C2 (en) |
| FR (1) | FR2830482B1 (en) |
| GB (1) | GB2382323B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8002781B1 (en) * | 2006-04-11 | 2011-08-23 | Dermody Iv William E | Braided sleeve with integral flanged end and its associated method of manufacture |
| WO2016075295A1 (en) * | 2014-11-14 | 2016-05-19 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Composite fibre material and fastening element |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITUD20070169A1 (en) * | 2007-09-19 | 2009-03-20 | Cifa Spa | PROCEDURE FOR THE CONSTRUCTION OF A CONCRETE DISTRIBUTION ARM, AND ARM OBTAINED SO |
| US8505184B2 (en) | 2009-03-13 | 2013-08-13 | Cifa Spa | Method to make an arm for the distribution of concrete, and arm thus made |
| DE102010010512B4 (en) * | 2010-03-05 | 2022-03-17 | Action Composites Hightech GmbH | Method for manufacturing a wheel rim and method for prefabricating a rim base of a wheel rim |
| DE102010018518B4 (en) * | 2010-04-27 | 2017-01-05 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for producing a fiber composite component |
| DE102014221356B4 (en) * | 2014-10-21 | 2019-05-23 | Airbus Operations Gmbh | Assembly with individual components made of a fiber-reinforced composite material |
| CN107548351A (en) | 2015-05-08 | 2018-01-05 | 慕贝尔碳技术有限公司 | Load applies element and produces the method that load applies element |
| DE102015112173B4 (en) | 2015-07-27 | 2023-12-28 | Cotesa Gmbh | Method for producing a connecting part for a tubular component made of fiber-reinforced plastic |
| DE102017113928A1 (en) | 2017-06-23 | 2018-12-27 | Cotesa Gmbh | Fiber composite component and an apparatus and a method for producing a fiber composite component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3185605A (en) * | 1959-08-21 | 1965-05-25 | Bristol Siddeley Engines Ltd | Methods of making resin reinforced articles |
| US4696711A (en) * | 1983-09-30 | 1987-09-29 | Mcdonnell Douglas Corporation | Method for forming holes in composites |
| EP0262266A1 (en) * | 1985-05-29 | 1988-04-06 | Microdot Inc. | Encapsulated fastener |
| US5079055A (en) * | 1989-09-21 | 1992-01-07 | Doyle Brian P | Reinforcement for laminate synthetic materials |
| DE19834772A1 (en) * | 1998-08-01 | 2000-02-10 | Inst Verbundwerkstoffe Gmbh | Fiber-plastic compound structural components with inserts, in which inserts are connected by fiber threads to reinforcing structure composed of individual reinforcing layers |
| EP1382436A1 (en) * | 2002-07-19 | 2004-01-21 | Vincent Duqueine | Method for moulding a composite article and moulding apparatus for carrying out said method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09269094A (en) * | 1996-03-29 | 1997-10-14 | Nippon Zeon Co Ltd | Electrically welded coupling manufacturing tool, its manufacture and electrically welded coupling |
-
2001
- 2001-10-04 DE DE10148950A patent/DE10148950C2/en not_active Expired - Fee Related
-
2002
- 2002-09-25 GB GB0222281A patent/GB2382323B/en not_active Expired - Fee Related
- 2002-10-03 FR FR0212227A patent/FR2830482B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3185605A (en) * | 1959-08-21 | 1965-05-25 | Bristol Siddeley Engines Ltd | Methods of making resin reinforced articles |
| US4696711A (en) * | 1983-09-30 | 1987-09-29 | Mcdonnell Douglas Corporation | Method for forming holes in composites |
| EP0262266A1 (en) * | 1985-05-29 | 1988-04-06 | Microdot Inc. | Encapsulated fastener |
| US5079055A (en) * | 1989-09-21 | 1992-01-07 | Doyle Brian P | Reinforcement for laminate synthetic materials |
| DE19834772A1 (en) * | 1998-08-01 | 2000-02-10 | Inst Verbundwerkstoffe Gmbh | Fiber-plastic compound structural components with inserts, in which inserts are connected by fiber threads to reinforcing structure composed of individual reinforcing layers |
| EP1382436A1 (en) * | 2002-07-19 | 2004-01-21 | Vincent Duqueine | Method for moulding a composite article and moulding apparatus for carrying out said method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8002781B1 (en) * | 2006-04-11 | 2011-08-23 | Dermody Iv William E | Braided sleeve with integral flanged end and its associated method of manufacture |
| WO2016075295A1 (en) * | 2014-11-14 | 2016-05-19 | OBE OHNMACHT & BAUMGäRTNER GMBH & CO. KG | Composite fibre material and fastening element |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2382323A (en) | 2003-05-28 |
| GB2382323B (en) | 2004-10-20 |
| DE10148950C2 (en) | 2003-07-31 |
| FR2830482B1 (en) | 2006-07-07 |
| DE10148950A1 (en) | 2003-04-24 |
| GB0222281D0 (en) | 2002-10-30 |
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