Combined 3d woven multilayer stands for composite structures

FIELD: textile, paper.

SUBSTANCE: stock comprises a central part with interwoven layers, the first and second end parts with independent woven layers. Layers of the independent woven layers pass along whole length of the stock in the central part to form a 3D woven structure. The layers are woven independently from each other in the end parts to form a pile of woven fabrics. Diagonal layers are added between independent woven layers in the first and second end parts. The 3D composite structure reinforced with a woven stock comprises a central part, the first and second end parts, and also a binding material.

EFFECT: invention provides for the possibility of the structure to perceive high concentrated loads.

22 cl, 8 dwg

 

The technical field of the invention

The present invention relates to the geometric configuration of the three-dimensional woven preforms for reinforced composite structures with quasiisotropic reinforcement, or reinforcement in many areas, at one or two ends of the structure and reinforcement approximately in the same direction in all other areas.

Background of the invention

The use of reinforced composite materials for the production of elements of design widespread nowadays, especially in those applications where the demand of their relevant characteristics, which are light in weight, strength, stiffness, thermal stability, no need for external support and adaptability to form and give them the desired shape. Such components are used, for example, in the aeronautical, aerospace, satellite and battery industries, and also for the purpose of recreation and entertainment, such as racing boats and cars, and in countless other applications. Three-dimensional structure consists mainly of fibers oriented in three directions, with each fiber passes along the direction perpendicular to the rest of the fibers, i.e. along the directions of the axes X, Y, Z.

Usually the components, the way the bathrooms are of similar structures, consist of reinforcing material embedded in a binder material. The reinforcing component may be manufactured from materials such as glass, carbon, ceramic, aramid (such as "KEVLAR®"), polyethylene and/or other materials which exhibit the necessary physical, thermal, chemical and/or other properties, chief among which is the high resistance to mechanical destruction under the action of loads. Due to the use of such reinforcing materials, which ultimately become a constituent element of the finished component, finished composite component made such required characteristics of reinforcing materials, such as very high strength. The components of the reinforcing materials can generally be woven, knitted or otherwise oriented in a desired configuration and shape for reinforcing blanks. Usually care is taken to ensure the optimal use of those properties, because of which these components reinforcing materials were selected. Basically, these reinforcing blanks are combined with a binder material for the formation of the final components or for the production of the current stock for final production of the final components.

After creating the necessary zag reinforcing the training binder material can be introduced and combined with the workpiece so what a reinforcing blank is enclosed in a binder, so that the latter fills the intermediate region between the constituent elements of reinforcement preform. The binder material may be any of a wide variety of materials, such as epoxy, polyester, vinyl ester, ceramics, carbon and/or other materials, which also have the necessary physical, thermal, chemical and/or other properties. The materials selected for use as a binder material may be or may not be the same as those used for reinforcing the workpiece, and may or may not have comparable physical, chemical, thermal and/or other properties. Usually, however, they will not be the same material or have comparable physical, chemical, thermal and/or other properties, which has reinforcing the workpiece, so as usual the desired goal of using composites in the first place is the achievement of a combination of characteristics in the final product that is unattainable through the use of only one component of the material.

After connecting reinforcing procurement and binder material can then be thermally solidified and strengthened in the same operation by shrinking or other known methods and then subjected to other operations to obtain the necessary component. It is important to note that the hardened mass of binder, i.e. after they have been thus thermally solidified, usually very much stick to the reinforcing material (e.g., reinforcing the workpiece). As a result the load on the final component, especially through the bonding material acting as a binder between the fibers can be effectively transferred to the average of its material reinforcement reinforcing blanks, and sustained them.

Usually a simple two-dimensional woven fabric or located in the same direction of the fibers produced by the material supplier and sent to the consumer, which cuts out the template and fold the end portion of the layer by layer. Simple woven materials are flat, essentially two-dimensional structure with the fibers passing in only two directions. They are formed by interlacing two sets of yarns at right angles to each other. In a two-dimensional weaving of yarns at an angle of 0° are referred to as fibers or warp threads, and the threads at an angle of 90° are called fibers or threads of the weft, or filling. For transfer molding resin kit woven fabrics can be made with the formation of dry layers, which is located in the form and filled with resin under pressure. These fabrics can be in advance of what otopleni using either technology "cut and sew", or obtained by thermal molding and primatene using binders based resins.

Two-dimensional woven structures, however, have limitations. The preliminary molding requires a lot of manual labor in the layering. Two-dimensional woven structures are not as strong or resistant to stretching along directions different from the axes 0°and 90°, especially at the corners remote from the axes of the fibers. One way to reduce this potential limitation is to add a diagonal fibers to weave and intertwine the fibers are cut across the fabric at an intermediate angle, preferably at ±45° to the axis of the fiber filling.

Simple woven preform also placed in separate layers. This limits the potential strength of the material. One possible solution is to increase the size of the fiber. The other is to use multiple layers, or layers. An additional advantage of using multiple layers is that some layers may be oriented from the condition that the axis of the warp and weft of different layers were in different directions, thus acting as previously described diagonal fibers. If these layers are stacked individual layers together using a resin, however, ZAT is a problem of delamination. If the layers are sewn together, then after that many of woven fibers can be damaged during the fusion process, and may decrease the full limit of the tensile strength. In addition, as for layering and stitching multiple layers usually necessary operation manual layers to align the layers. Alternatively, these layers can be binded as part of the weaving process. The creation of multiple interwoven layers of fabric, especially with built-diagonal fibers, was a difficult problem.

One example, where composite materials are used for the production of structural elements presented in the production of working compressive and tensile structural elements, that is, posts and ties. Rack and tie usually contain a Central core having connecting elements at each end of the structure. These connecting elements can be either covered or covering (clip) configuration, and are used to attach the rack or tie to the design for its hardening or strengthening. As discussed earlier, in order to achieve increased strength composite structures, multiple layers, or layers, are used for connecting elements and rods struts and ties. Although the use of multiple layers is advantages is owned, since the individual layers can be oriented to provide reinforcement in the directions 0° and 90°, and can be oriented with an inclination to perform reinforcement in additional directions, such as directions of ±45°, if they are formed in a multilayer structure using a resin, the delamination of these layers can be a problem. Alternatively, if the layers are sewn together, then, as discussed earlier, many of woven fibers may be damaged during the fusion process, reducing the overall limit of the tensile strength of the final structure.

There are many examples of multi-layered connecting elements, some of which are of dissimilar materials (i.e. alternating layers of carbon and titanium), but multi-layered connecting elements were not combined with three-dimensional woven core. The viability of the multi-layer composite connecting elements for very highly loaded structures has been demonstrated in several programs, funded by the government. However, according to the Applicant, none of these programs have not considered the use of three-dimensional woven preforms.

Accordingly, there is a need in the three-dimensional workpieces for use in racks and tie, having a multi-layer joints is cnie ends or parts and monolithic three-dimensional woven Central core. The advantages of using three-dimensional structures in the Central part of the billet is that it reduces the manual labor required to cut and organize all of the layers required for thick composite, and that it provides better resistance to damage compared with conventional laminated composites. The advantage of independent layers at the ends is that the layered material may be tailored to have specific properties.

Accordingly, there is a need in woven stocking with woven in one piece of three-dimensional Central part, multi Spigots containing independent woven layers.

The invention

Therefore, the main objective of the invention is to create a three-dimensional woven preform having a twisted rod and a stack of individually woven fabrics for connecting the ends for use in composite structures.

Another aim of the invention is to create a woven preform for thick composite structures, which has quasiisotropic reinforcement, or reinforcement in many directions, on one or two ends, and the reinforcement is approximately in the same direction in all areas.

Another objective of the invention is to create a composite design the products, which can be used for the perception of large concentrated loads.

These and other objectives and advantages are provided by the present invention. In this respect, the present invention is directed to the woven preform, which is used for reinforcement of composite structures and method of manufacture of the workpiece. Woven blank has a Central portion with interwoven layers. The workpiece includes a first end part having an independent woven layers which are woven as one piece with twisted layers in the Central part and along the entire length of the workpiece. Harvesting includes the second end part having an independent woven layers which are woven as one piece with twisted layers in the Central part and along the entire length of the workpiece. Between independent woven layers in the first and second terminal parts are interspersed with diagonal seams. To ensure the gaps between independent woven layers in the first and second terminal parts for the diagonal layers, the layers of fibers or warp threads stretched from the workpiece. In addition, in accordance with any of the described embodiments may be created woven preform having one connecting one end and a rod end.

Another aspect of the present invention is directed to Tr the dimensional reinforced composite structure, created using woven preform described in this document. Reinforced composite structure has a Central portion which has a reinforcement in one direction, and first and second end parts, which reinforced quasiisotropic, or in many areas. Reinforced composite structure can also be created so that it has a rod on one end and a connecting part at the other end.

Various new characteristic features that distinguish the invention, shown in detail in the claims appended to this description and forming a part thereof. For a better understanding of the invention, its functional advantages and the specific objectives achieved when using it, made reference to the accompanying description, in which is illustrated the preferred embodiments of the invention in the accompanying drawings, in which corresponding components are marked with the same number of positions.

Brief description of drawings

The following detailed description, given by way of example and not intended to limit the present invention solely to them, will be best understood in conjunction with the accompanying drawings, in which similar item numbers indicate similar elements and parts, in which:

figure 1 shows a view in plan of a composite structure having a core with Spigots, having covered the configuration.

figure 2 shows a view in plan of a composite structure having a rod connecting ends having a covering, or in the form of staples, configuration;

figure 3 shows a view in plan of the blank, created according to one variant of implementation of the present invention;

on figa shows a view in plan of a blank having a connecting end with a symmetric configuration, created according to one variant of implementation of the present invention;

on FIGU shows a view in plan of a blank having a connecting end with a symmetric configuration, created according to one variant of implementation of the present invention;

on figs shows a view in plan of a blank having a connecting end with an asymmetric configuration is created according to one variant of implementation of the present invention;

on fig.4D shows a view in plan of a blank having a connecting end with an asymmetric configuration is created according to one variant of implementation of the present invention;

figure 5 shows a view in plan of the blank, created according to one variant of implementation of the present invention.

Description of the preferred embodiments

The present invention is described below bleephole with reference to the accompanying drawings, showing preferred embodiments of the invention. However, the invention can be implemented in many different forms and should not be construed as limited to the illustrated execution options proposed in this document. Rather, these illustrated embodiments of the executed so that this description will be thorough and complete, and will fully convey the scope of the invention.

In the following description, the same item numbers indicated similar or corresponding elements in all the drawings. In addition, in the following description, it is clear that terms such as "upper", "lower", "top" and "bottom"and the like are words of convenience and should not be construed as limiting terms.

The present invention represents a General principle blanks for composite structures or beams, which has quasiisotropic reinforcement, or reinforcement in many directions, on one or two ends, and the reinforcement is approximately in the same direction in all other areas. This configuration is desirable for structures that need to transfer significant concentrated loads, such as structural elements, working in compression and in tension, that is, the rack and the wall is key. Ends with quasiisotropic reinforcement, or reinforcement in many areas, provide good support properties, and more balanced strength in tension, compression and shear deformation, making them a good election for spigot design. These connecting ends can be either covered or covering (in brackets), configuration. Unidirectional part provides a high axial stiffness, which is good to prevent buckling or deformation of the rod, making it a good choice for the main stem of the rack or tie. Figure 1 shows a rack or plate 2 having connecting ends 4 and three-dimensional main core portion 6. The connecting ends 4 in figure 1 are covered configuration. Figure 2 shows a rack or plate 8 with three-dimensional main rod part 10 and the Spigots 12, having a covering configuration, or the configuration of the brackets.

The advantages of using three-dimensional structures in the Central part of the billet are that it reduces the manual labor required to cut and organize all of the layers required for thick composite, and that it provides better resistance to damage than traditional laminated composites. The advantage of independent layers at the ends of the design is stolovy material can be adapted so to have special properties. As described, the connecting ends are treated as reinforced quasiisotropic, or reinforced in many areas, but they can have almost any multi-layer configuration.

Proposed procurement contains three-dimensional woven part, which consists of a number of layers and the same number of independent diagonal layers. In the Central, or core, part of a three-dimensional woven details all the layers are twisted, or woven together as one unit with the formation of a monolithic block of woven material. Fibrous structure used in this part, may be of any conventional figure for thick workpieces, including, but not limited to: "layer on layer", "thickness", "angle vzaimoperehoda" or "rectangular" structure. At the ends of the structures of the individual layers are woven independently of one another to form a pile fabric with reinforcement in the directions 0° and 90°, where 0° is the direction along the length of the structure. Diagonal layers, or strata, which are created separately, provide reinforcement in more directions relative to the direction of 0°/90°, such as the direction of ±45°, interspersed between layers of tissue "0°/90°for the formation of a more traditional multi-layered material. Diagonal the layers, or the layers may be woven using fibers or threads of the warp and weft, or they can be non-woven, bound, or to represent an array or fibers, or filaments of the machine or transverse directions. In the subsequent drawings, the direction of the warp is along the direction of 0°, or along the length of the structure, and is indicated by an arrow 100.

All the layers that make up the workpiece, including the Central, or core, part, woven from fibers or threads of the base and the fibers or filaments of the weft or filling, using jacquard looms and captured Shuttle weaving machine; however, for weaving layers may be used any conventional weaving. The fibers or filaments can be from both synthetic and natural materials, such as carbon, nylon, rayon, polyester, fiberglass, cotton, glass, ceramic, aramid ("KEVLAR®") and polyethylene, but not limited to. Finished woven preform is then processed with the formation of woven/laminated composite structures by introducing a binder material, such as, but not limited to: epoxy, polyester, vinyl ester, ceramics, carbon and/or other materials, which also have the necessary physical, thermal, chemical and/or other NWO is STV, using traditional techniques such as transfer molding resin or chemical vapor infiltration, but not limited to.

In accordance with one implementation of the present invention, figure 3 shows part of the structure 14 having a thick Central portion 16, which is made as one unit with two thinner covered Spigots 18, which are located on each side of the Central part 16. As can be seen in figure 3, the thick Central part 16 is a monolithic three-dimensional woven rod containing multiple woven layers 50, which are twisted or woven together. In order to form a more delicate covered connecting ends 18, the layers of fibers basics from a thick Central stem 16 vyplitayutsya of the workpiece to provide a tapered transition 22 from the terminal 16 to the thinner connecting ends 18.

As soon as the required number of layers of fibers basics weave of the presets for sharpening rod to the desired thickness of the connecting elements, additional layers of fibers vyplitayutsya of the workpiece on a more subtle connecting ends 18 to provide a gap, or space, for the diagonal layers of fabric. The remaining fiber basis for thinner connecting ends 18 that are woven as one whole is with many layers 50 in the core or Central part 16, and are continuous along the length of the structure, form individual layers of the layers 24, which are woven independently from one another. This stack of layers or tissues provides reinforcement in a thinner connecting ends 18 in the directions 0° and 90°. As the reservoir 24 with the values 0°/90° are not entangled with each other, in between layers 24 with 0°/90° can be disseminated diagonal layers 26, which provide reinforcement in additional areas, such as the direction of ±45°, forming a stack of tissues, which, when added to the binder material, to form a multilayer structure, which provides quasiisotropic reinforcement, or reinforcement in many ways, more subtle connecting ends 18. In addition, as shown in figure 3, the design has a continuous surface fiber 28, which is formed furthest from the center of the fiber framework thick rod 16.

If necessary, unlike the previously described designs for this option, perform, which has a Central portion 16 with two more thin Spigots 18 on each side of the Central part 16, in accordance with the described variant of execution can be created in design, having only one more thin connecting end 18. In this case, the structure will contain one who once, similar monolithic three-dimensional woven Central part 16, and one more thin connecting end 18, as described above. Design created in this way will have a close resemblance to what is shown in figure 3.

Another embodiment of the present invention shown in figa-4D, which illustrates part of the structure 30, containing two spigot 32, thicker than a monolithic three-dimensional woven a Central core portion 34 of the structure 30. As in the previous embodiment, the Central portion 34 contains multiple woven layers 35, twisted, or woven together. In this configuration, however, there is no need to vyplatit fiber 36 fundamentals of part 34 to create a thicker spigot 32. Instead, all of the fibers 36 of the basis used to create the parts 34 are also used to build thicker spigot 32. Fiber 36 basics of the rod part 34, however, is not entangled with each other in thicker connecting ends 32. This allows you to intersperse diagonal layers 38 between the fibers 40 bases in thicker connecting ends 32, which provides reinforcement in the direction of 0°/90°. As a result, thicker connecting ends 32 have a pile fabrics consisting of layers or tissues, oriented at 0°/90°, and delno created layers, oriented in directions different from the directions of 0°/90°, for example, layers or tissues, oriented at an angle of ±45°, which, when injected binder, results in a multi-layered connecting element having quasiisotropic reinforcement, or reinforcement in many areas. In addition, as can be seen in figa-4D, designs created under this option, perform, will have a stepped passage 42 from the multi-layer, thicker, spigot 32 to the monolithic part 34, thereby improving the transfer of load from one part to another.

As you can see in figa-4D, the length and location of diagonal layers 38 on all the various drawings. On figa and 4B shows the connection end 32 having a symmetrical configuration. That is, the length and location of diagonal layers 38 in the connecting end 32 symmetric about the center line or longitudinal axis A-A. In figa shows a symmetric configuration where the length of the subsequent diagonal seams 38 increases in the upper half 39 and in the lower half 41 spigot 32, if you move from the center line a-a toward the upper surface 43 and the bottom surface 45 a connecting end 32. On FIGU shows a symmetric configuration where the length of the successive diagonal layer 38 is reduced in both halves 9 and 41 of the spigot 32, if you move from the center line a-a toward the upper surface 43 and the bottom surface 45 spigot 32.

On figs and fig.4D shows the connection end 32 having an asymmetric configuration. That is, the length of the subsequent diagonal layers 38 in the connecting end 32 only increases or decreases, if we move from the lower surface 45 of the upper surface 43 of the mating end 32. On figs shows an asymmetric configuration where the length of the subsequent diagonal layers 38 in the connecting end 32 is increased, if we move from the lower surface 45 of the upper surface 43 of the mating end 32. As shown in fig.4D can also be created asymmetric connecting end 32, where the length of the subsequent diagonal layers 38 decreases if we move from the lower surface 45 of the upper surface 43 of the mating end 32.

If necessary, unlike the previously described constructions, for this option, perform, which has a Central portion 34 with two thicker the Spigots 32 on each side of the Central part 34 according to the described embodiment may be created by design, having only one thicker connecting end 32. In this case, the structure will contain one end, similar to the monolithic three-dimensional woven Central part 34, and Odie is thicker connecting end 32, as explained above. Design created in this way will correspond to the structures shown in figa-4D.

In another embodiment, the present invention figure 5 shows part of the structure 44 having a monolithic three-dimensional woven Central rod portion 46 with two covering the connecting elements or connecting brackets 48. As can be seen in figure 5, covering the connecting ends 48 are angled relative to the Central portion 46 so that the ends 48 does not lie on the same line with the Central part 46 or not collinear with it. Similarly to the previous variants of execution, the Central portion 46 consists of multiple woven layers 50, which are twisted, or woven together. In order to form the covering connecting the ends, or staples, 48, monolithic piece 46 are woven so that it forks in place 52 with the formation of the two halves of the connecting straps. Layers 54, passing under an angle of 0°/90°, in the first, or angled, part 56 of each half of the connecting straps remain bound together.

To ensure the gap between passing at angles of 0°/90° reinforcing layer 58 for the diagonal layers 60 of the frame in parallel, or limit, the parts 62 of the bracket, fiber basics vyplitayutsya of the angled portions 56 of the workpiece. OST the present fiber basics for connecting the ends 48, which are woven as a single unit with multiple woven layers 50 in the Central part 46 and angled portions 54 form separate layers that are woven independently from each other and provide reinforcement to the bracket 48 in the directions 0° and 90°. As the layers 58 at angles of 0°/90° are not entangled with each other, the reinforcement in directions other than the directions of 0°/90°, for example, in the direction of ±45°, is provided with diagonal seams 60, which are interspersed between layers 58 direction 0°/90°, forming a stack of tissues in the connecting brackets that provides quasiisotropic reinforcement, or reinforcement in many areas, when the workpiece is added to the binder.

If necessary, unlike the previously described designs, to use this method of execution, which has a Central portion 46 with two covering the Spigots, or staples, 48, on each side of the Central portion 46 according to the described embodiment may be created by design, having only one covering the connecting end 48. In this case, the structure will contain one end, similar to the monolithic three-dimensional woven Central part 46, and one covering the connecting end or bracket 48, as described above. Design created in this way will be more closely resemble the structure shown in figure 5.

In all described embodiments, execution, after the introduction of diagonal seams in connecting the ends of the woven blank may be wrapped with a layer of glass material in order to improve the abrasion resistance of the workpiece.

As it is obvious for specialists, constructions, described above, can take many forms, except those described in this document. For example, design can have a thick monolithic three-dimensional woven core with the covering docking configuration, or from a connecting configuration in the form of a connecting bracket. The design may also have a thick monolithic three-dimensional woven rod covered with the connecting element at one end and covering the connecting element at the other end. Furthermore, the design may have a thin monolithic three-dimensional woven core with the covering connecting elements at each end, or covered by the connecting element at one end, and covering the connecting element at the other end. Finally, all configurations can have both a connecting element on the same line with the main part of the rod or collinear with her; both connecting element located at an angle relative to the main part of the rod; or one connecting element may be collinear with the main part, and one docking ale the HT can be positioned at an angle relative to the main part. Although, as described above, the connecting ends are treated as reinforced quasiisotropic, or reinforced in many areas, these connecting ends can have almost any multi-layer configuration. Therefore, the proposed design, for example, working in compression or crimping structural elements can have various configurations to provide various types of reinforcement or bracing, based on the specific needs of the design or the required use.

Although herein described in detail a preferred embodiment of the present invention and its modifications, it should be understood that the invention is not limited to this particular case execution and modifications, and that professionals may implement other modifications and variations without departure from the essence and scope of the invention installed in the attached claims.

1. Woven preform used to reinforce a composite structure containing:
the Central part, with interwoven layers
the first end part having an independent woven layers
the second end part having an independent woven layers and layers of these independent woven layers are continuous over the entire length of the workpiece specified in the Central part with the formation of three-dimensional woven structure,
moreover, these layers of woven independently from one another in said terminal parts with the formation of the pile woven fabrics,
and between these independent woven layers in the first and second terminal parts interspersed with diagonal seams.

2. Woven preform according to claim 1, in which the Central part contains layers that run along the entire length of the specified workpiece, and the layers that are partially along the length of the specified preset.

3. Woven preform according to claim 2, in which the mentioned partially passing layers formed of fibers or filaments bases that Russian from the specified woven preform and form a transition from the Central part of the workpiece to the first and second end parts.

4. Woven preform according to claim 2, in which the intervals for the specified diagonal seams between independent woven layers in the first and second terminal parts formed as a result of vyplatenia fibers or filaments basis of the aforesaid bar.

5. Woven preform according to any one of claims 1 to 4, in which the first end part and/or the second end portion is a connecting element having covered or covering configuration.

6. Woven preform according to claim 1, in which the first end part and/or the second end portion collinear with the Central part, or is located at an angle to it.

7. Dana the workpiece according to claim 3, in which the specified transition between the Central part and first and second end portions is smooth tapered transition or step transition.

8. Woven preform according to claim 1, in which the Central part of the forks on your end.

9. Woven preform of claim 8, in which the specified forked end forms two halves covering the docking element or bracket.

10. Woven preform according to claim 1, in which the Central portion is thicker or thinner than the first and second end parts.

11. Woven preform according to claim 1, in which the Central part is reinforced in one direction.

12. Woven preform according to claim 1, in which the mentioned first and second end parts reinforced quasiisotropic or in many areas.

13. Woven preform according to claim 1, in which a Central portion and first and second end pieces woven from fibers or threads of the warp and weft.

14. Woven preform according to claim 1, in which the Central part has a structure of fibers selected from the group consisting of structures layer by layer", "thickness", "right angle" and "angle vzaimoperehoda".

15. Woven procurement item 13, in which the said fibers or filaments of the warp and weft selected from the group of synthetic or natural materials consisting of carbon, nylon, rayon, Polia the tera, fiberglass, cotton, glass, ceramic, aramid, and polyethylene.

16. Woven preform according to claim 1, which is wrapped with a layer of glass.

17. A method of manufacturing a woven preform used to reinforce a composite structure, including:
interlacing the layers with the formation of the Central part,
the interweaving of independent layers with the formation of the first end part,
the interweaving of these independent layers with the formation of the second end part,
moreover, the layers of these independent woven layers are continuous over the entire length of the workpiece, and in the Central part of these layers are woven as one piece with the formation of three-dimensional woven structure, and the terminal parts of these layers are woven independently of one another with the formation of the pile woven fabrics,
the inclusion of diagonal seams between these independent woven layers in the first and second terminal parts.

18. Three-dimensional composite structure, reinforced woven preform containing:
the Central part, with interwoven layers
the first end part having an independent woven layers, which are intertwined to form one whole with the specified intertwined layers in the Central part and along the entire length of a woven preform, and
the second end part having an independent woven layers that are interwoven with the image is of one whole with the specified intertwined layers in the Central part and along the entire length of a woven preform, and between these independent woven layers in the first and second terminal parts interspersed with diagonal seams, and
binder material.

19. Composite design p, which is formed using a process selected from the group consisting of the transfer molding resin and chemical filtration of steam.

20. Composite design p or 19, in which the specified binder material selected from the group consisting of epoxy, polyester, vinylester, ceramics, and carbon.

21. Woven preform used to reinforce a composite structure containing:
a core part having interwoven layers
the connecting end part having an independent woven layers, which are intertwined to form one whole with the specified intertwined layers in the core part and pass along the length of the woven preform,
and between these independent woven layers in the connecting end portion of disseminated diagonal seams.

22. Woven procurement item 21, further containing a binder material.



 

Same patents:

FIELD: textile, paper.

SUBSTANCE: when forming face fabric, only weft overlaps are formed in threads of chain warp, and when back cloth is formed, only weft overlaps are formed on threads of face warp, and diversion of face and back fabrics produced as a result of weaving from edging is done by value specified by a ratio. Face fabric on face surface forms relief in the form of crease along width of surface with subsequent repetition in at least two threads of face weft.

EFFECT: expansion of products assortment due to production of single and double sided fabrics with relief surface using warp and weft threads, differing both in linear density and by type and colour with preservation of properties set for furniture-decorative fabrics, ie required surface density, strength and change of linear dimensions after wet treatment.

2 cl, 8 dwg, 2 tbl

FIELD: electric engineering.

SUBSTANCE: invention is related to method for manufacturing of electrolysis bag, inside of which an electrode may be placed. Electrolysis bag is made by method of cloth formation with hollow core at single loom. Bag has hollow section with two separate layers of cloth. Further, at bag edges, layers of cloth are fixed together with the help of weaving sections. Bags are cut from cloth after formation. Open upper part provides for the possibility of electrode insertion inside bag.

EFFECT: simplification and cheapening of electrolysis bag manufacturing.

12 cl, 22 dwg

The invention relates to the field of the textile industry and relates to a multilayer fabric, made of weft threads and the two systems of the main threads, one of which is used to create folds with the upper and lower cuffs, fastened with the second main system along the lower flap with locking weft threads

FIELD: roof.

SUBSTANCE: invention is related to roll roofing materials. Roll roofing material contains upper protective layer, substrate and polymer reinforcing mesh arranged in between. Protective layer is made of composition that consists of polyvinyl chloride, dioctyl phthalate, chalk, titanium dioxide and thermal stabilisers. Substrate is made of composition made of polyvinyl chloride, dioctyl phthalate, chalk, thermal stabilisers and wastes of roll roofing material production.

EFFECT: invention provides for lower level of linear dimensions variation in process of material heating and high quality of material with increase of its thickness.

2 ex

FIELD: engineering procedures.

SUBSTANCE: one version of the method consists that the cloth is placed on porous substrate movable on the straight or rotating about the axis. At least one side of the cloth is processed with some water jets rowed perpendicularly to cloth moving direction. Herewith a row is formed with one-section jets and at least other section jets different from the first one.

EFFECT: improved surface properties of the product.

33 cl, 17 dwg

FIELD: technological processes.

SUBSTANCE: proposal is given of a sheet with at least, two monolayers, each of which contains unidirectional oriented fibres, binding substance and parting film with porosity of 40-90% on both outer surfaces. The unidirectional oriented fibres in the monolayer have breaking stress of approximately 1.2GPa, and Young's modulus of at least 40 GPa. The direction of fibres in each monolayer is opposite the direction of fibres in the adjacent monolayer. The invention also pertains to assembling of at least, two such sheets and a flexible object, resistant to ballistic effects, with such a structure.

EFFECT: increased ballistic stability.

11 cl, 1 tbl, 3 ex

The invention relates to a method of manufacturing a composite multi-layered material, preferably a material with cross-orientation of reinforcing fibers, whereby parallel spaced fibers covered with a matrix substance and together with the pre-formed non-leaking tracks arranged in parallel fibers or overlapping systems arranged in parallel, the fibers are passed through a zone of overlap, and the orientation of the fibers in the joined layers has at least two directions

The invention relates to chemical engineering and can be used in capacitive equipment in contact with corrosive environments of various chemical, petrochemical, electronic, textile and related industries

FIELD: technological processes.

SUBSTANCE: proposal is given of a sheet with at least, two monolayers, each of which contains unidirectional oriented fibres, binding substance and parting film with porosity of 40-90% on both outer surfaces. The unidirectional oriented fibres in the monolayer have breaking stress of approximately 1.2GPa, and Young's modulus of at least 40 GPa. The direction of fibres in each monolayer is opposite the direction of fibres in the adjacent monolayer. The invention also pertains to assembling of at least, two such sheets and a flexible object, resistant to ballistic effects, with such a structure.

EFFECT: increased ballistic stability.

11 cl, 1 tbl, 3 ex

FIELD: engineering procedures.

SUBSTANCE: one version of the method consists that the cloth is placed on porous substrate movable on the straight or rotating about the axis. At least one side of the cloth is processed with some water jets rowed perpendicularly to cloth moving direction. Herewith a row is formed with one-section jets and at least other section jets different from the first one.

EFFECT: improved surface properties of the product.

33 cl, 17 dwg

FIELD: roof.

SUBSTANCE: invention is related to roll roofing materials. Roll roofing material contains upper protective layer, substrate and polymer reinforcing mesh arranged in between. Protective layer is made of composition that consists of polyvinyl chloride, dioctyl phthalate, chalk, titanium dioxide and thermal stabilisers. Substrate is made of composition made of polyvinyl chloride, dioctyl phthalate, chalk, thermal stabilisers and wastes of roll roofing material production.

EFFECT: invention provides for lower level of linear dimensions variation in process of material heating and high quality of material with increase of its thickness.

2 ex

FIELD: textile, paper.

SUBSTANCE: stock comprises a central part with interwoven layers, the first and second end parts with independent woven layers. Layers of the independent woven layers pass along whole length of the stock in the central part to form a 3D woven structure. The layers are woven independently from each other in the end parts to form a pile of woven fabrics. Diagonal layers are added between independent woven layers in the first and second end parts. The 3D composite structure reinforced with a woven stock comprises a central part, the first and second end parts, and also a binding material.

EFFECT: invention provides for the possibility of the structure to perceive high concentrated loads.

22 cl, 8 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly to production of structural parts from composite materials. Window composite ring with multilayer reinforcing material has ring-shape closed contour and nonstandard profile. It comprises inner and outer flanges and ribs made from laid textile reinforcing materials bent from flange into rib and embedded into stiff polymer binder. Ring layers are made up of braided and woven hose-shaped clothes with diagonal braiding of threads. Layering is performed by horse-shaped cloth bending over inner and outer edges of flanges and rib so that every next layer makes an extension of previous layer to allow a smooth continuous seamless transition of layers from flanges to rib and vice versa.

EFFECT: lower labour input and costs.

16 cl, 21 dwg

FIELD: chemistry.

SUBSTANCE: carbon fibre reinforcement frame for producing carbon-carbon composite material, which is resistant to oxidation and erosion under high temperature and pressure, for example, for the tip of a rocket head, comprises a central unidirectional cylindrical bundle of a given diameter made of carbon fibre bonded with binder - aqueous polyvinyl alcohol solution, on which, like an arbour, a cocoon of carbon fibre is wound by honeycomb winding. The workpiece for making a reinforcement frame of carbon fibre is in the form of a unidirectional cylindrical bundle of a given diameter arranged centrally along an axis and made of carbon fibre which is bonded with aqueous polyvinyl alcohol, on which, at a distance equal to the height of a workpiece of the tip of a rocket head by ring winding, polar barriers are applied in the form of a spherical surface made of carbon fibre soaked with the binder - aqueous polyvinyl alcohol solution. The method of making a reinforcement frame from carbon fibre for producing carbon-carbon composite material, which is resistant to oxidation and erosion under high temperature and pressure, is carried out in the following sequence: winding a cocoon of carbon fibre soaked with aqueous polyvinyl alcohol on a workpiece, having a bundle of unidirectional carbon fibre with two polar barriers by honeycomb winding, as on an arbour. After drying the frame and cutting off the ends of the cocoon with polar barriers, the frame is taken for saturation with a carbon matrix.

EFFECT: making a high-density reinforcement frame which, after saturation with a carbon matrix, is used to produce carbon-carbon heat-protective material, which is resistant to erosion under the effect of high temperatures and pressure, for example, the tip of a rocket head.

4 cl, 4 dwg

Rotor blade and fan // 2592156

FIELD: machine building.

SUBSTANCE: rotor blade comprises rotor blade housing and rotor blade root section, made integral with rotor blade housing. Housing of rotor blade is formed by stacking of multiple composite sheets, each of which is made of fibres and matrix resin, and includes multiple first sets of composite sheets and multiple second groups of composite sheets located in direction of thickness of blade. Each first group of composite sheets comprises multiple composite sheets laid one on another from centre of thickness of blade towards blade back and which differ from each other by orientation angle of fibres. Each second group of composite sheets comprises one or more composite sheets laid one on another from centre of thickness of blade towards blade pressure surface and which differ from each other by orientation angle of fibres. Layouts of multiple composite sheets in first and in second group of composite sheets are identical. Resultant direction of orientation of fibres directions in multiple composite sheets in each of first group of composite sheets and second group of composite sheets is inclined to rear edge at acute angle from direction of span, passing from central end of rotor blade housing to upper end of rotor blade housing. Another invention of group refers to fan, which includes rotor blade installed in mounting groove of its disk.

EFFECT: group of inventions provides resistance to vibrations of rotor blades at reduction of weight.

4 cl, 14 dwg

FIELD: space.

SUBSTANCE: invention can be used in aerospace industry, in production of sports goods and leisure products. Prepreg with formability comprises a base material from a stitched carbon fibre. Multiple sheet materials 1 are arranged in layers and then stitched and joined together in a stitched base material using stitch thread 2 interlaced when passing through sheet materials 1. Each sheet material 1 is formed by arranging lines 11 of the carbon fibre parallel to each other. Direction of arranging lines 11 of the carbon fibre of each sheet material 1 forms an angle ranging from ±30° to ±60° to the direction of movement of interlacing stitch thread 2. Degree of the stitched base material tension in its longitudinal direction in case when a specific load per inch of width of the stitched base material is applied in the direction of movement of interlacing stitch thread 2 is equal to or below 4 % when the load is equal to 5N and is equal to or higher than 10 % when the load is 25N. Prepreg is formed by impregnation of the base material from the stitched carbon fiber, in which multiple sheet materials 1 are arranged in layers and then stitched and joined together using stitch thread 2 interlaced when passing through sheet materials 1 by a thermosetting resin within the range from 30 wt% to 50 wt%.

EFFECT: invention enables to obtain a base material from a stitched carbon fibre, which has high shape stability and moldability and provides for convenience in processing a wet prepreg, facilitates production of a 3D shape.

9 cl, 6 dwg, 1 tbl, 4 ex

FIELD: textile, paper.

SUBSTANCE: sheet includes the first nonwoven web and the second nonwoven web, each of them is the nonwoven web in which the mesh made from the long fibers and it is bonded by thermally connected sections by fusion. Each of the long fibers is the monocomponent fiber, made in the process of uniform spinning of melted thermoplastic polymer. The sections connected by fusion forming the sheet, forms by partial connection by fusion of the first nonwoven web and the second nonwoven web, and each section connected by fusion forming the sheet has on the inner side of its contour the through hole in which the outer peripheral edge has the shape similar to the shape of the contour. The first nonwoven web and the second nonwoven web are connected in the section between the contour of sections connected by fusion forming the sheet and the outer peripheral edge of the through hole.

EFFECT: invention allows to reduce the liquid residue in the absorbent product and reduce its rewetting.

26 cl, 7 dwg, 1 tbl, 3 ex

Up!