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Fiber bundle, three-dimensional woven structure, three-dimensional fabric composite material and technological method

A composite material, three-dimensional fabric technology, applied in the direction of fabrics, textiles, textiles and papermaking, can solve the problems of low fracture toughness, low shear modulus, shear failure and other problems of fibers

Active Publication Date: 2021-03-12
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a fiber bundle, a three-dimensional woven structure, a three-dimensional fabric composite material and a process method to solve the problem that the shear modulus in the G12 direction of the three-dimensional fabric composite material is low and the fracture of the fiber occurs when the three-dimensional fabric composite material is sheared and deformed. Low toughness, prone to shear failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Fiber bundle, three-dimensional woven structure, three-dimensional fabric composite material and technological method
  • Fiber bundle, three-dimensional woven structure, three-dimensional fabric composite material and technological method
  • Fiber bundle, three-dimensional woven structure, three-dimensional fabric composite material and technological method

Examples

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Effect test

Embodiment 1

[0067] Such as figure 2 As shown, the fiber bundle is used to weave a three-dimensional fabric composite material. The fiber bundle is composed of several strands, and several strands are twisted together. The strands are carbon fibers. The model of the carbon fiber is T800H, and the specification of the carbon fiber is 6K. Yarn twists are: 5 twists / m, 10 twists / m, 20 twists / m, 40 twists / m, 60 twists / m.

[0068] In order to meet the final size requirements of the parts during the forming process, the three-dimensional fabric often undergoes large deformation during the forming process, among which shear deformation is the most important form of deformation, and the shear resistance of the three-dimensional fabric is affected by the interweaving points of the yarns. The limitation of the friction force between yarns and the effect of the relative spatial relationship between the yarns, the shear modulus is generally lower in the G12 direction. In order to solve the poor shear...

Embodiment 2

[0076] The structure of the fiber bundle of embodiment two is identical with embodiment one, and difference is: the model of the carbon fiber of embodiment two is CCF800H, and the specification of carbon fiber is 6K, and the single yarn twist of fiber bundle is respectively: 5 twist / m, 10 Twist / m, 20 twist / m, 40 twist / m, 60 twist / m.

[0077] Using the test method identical with embodiment one, the fiber bundle of embodiment two is tested, and test result is as follows Figure 6 It can be seen. The twisted fiber bundle of the present invention is compared with the fiber bundle without twisting treatment, and its elongation at break along with the increase of twist presents the trend that first increases and then decreases, and the shear modulus is at a twist of 20 twists / m reached the maximum. Considering the influence of twisting on the properties of both, it is recommended that the fiber twisting degree be 20 twists / m.

Embodiment 3

[0079] Such as Figure 7 As shown, according to the relationship curve between G12 and fiber bundle twist angle simulated according to classical laminate theory (the data has been regularized), it can be seen that when the fiber bundle twist angle reaches 45°, the shear modulus of G12 is the largest.

[0080] Such as Figure 8 As shown, the present invention also provides a three-dimensional woven structure. The three-dimensional woven structure is composed of six layers of fiber cloth layers and several Z-direction fibers. Fiber cloth laying, the warp and weft yarns are fiber bundles, the fiber bundles are composed of several strands, and several strands are plyed and twisted. Among them, the strands are carbon fibers, the number of strands is 2, the specifications of the carbon fibers are 6K or 12K, the twist of the fiber bundle is 60 twists / m, and the twist angle of the fiber bundle is less than 23°.

[0081] Specifically, the six layers of fiber cloth layers are respecti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a fiber bundle, a three-dimensional woven structure, a three-dimensional fabric composite material and a technological method. The fiber bundle is composed of a plurality of plied yarns, the plied yarns are stranded and twisted, the plied yarns are carbon fibers, and the single-yarn twist of the fiber bundle is 5-60 twists / m. By twisting the fiber bundles and designing thearrangement mode of the twisted fiber bundles, the longitudinal and transverse shear modulus and fracture toughness of the three-dimensional fabric composite material can be improved, and the application space of the three-dimensional fabric composite material on aviation parts is enlarged; and the fiber bundles are twisted, so that the overall performance of the fiber bundles can be improved, thedegree of twist and the twist angle can influence the performance of the twisted three-dimensional fabric composite material, the binding force between the fiber bundles and resin is increased, and the out-of-plane shearing performance is improved.

Description

technical field [0001] The invention relates to a fiber bundle and a three-dimensional woven structure. [0002] The invention also relates to a three-dimensional fabric composite material and a process method. Background technique [0003] As a high-performance fiber, carbon fiber has many excellent properties, not only low volume mass, high specific strength, high specific modulus, but also good heat resistance and chemical stability. It is generally added to resin, metal, ceramics, concrete, etc. as a reinforcing material. Materials constitute composite materials. At present, the most widely used structural composite material is fiber-reinforced composite material. The processing method is to stack multiple layers of single-layer fiber cloth, soak the fiber cloth with a resin matrix, and obtain a composite material laminate after curing and molding. Compared with metal materials, composite laminates have better in-plane strength and stiffness. However, compared with tr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D03D25/00D03D15/275D02G3/02B29C70/24
CPCD03D25/005D03D15/00D02G3/02B29C70/24D10B2101/12
Inventor 张婷李向前徐焱
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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