TWI894004B - Fiber-reinforced structure - Google Patents

Abstract

A fiber-reinforced structure has a first fiber and a second fiber, where the second fiber has less rigidity than the first fiber. The second fiber is combined with the first fiber to form a continuous fiber bundle, and the second fiber is unevenly distributed within the first fiber and unevenly distributed across the cross-section of the continuous fiber bundle. The second fiber enhances the impact resistance, fatigue resistance, moldability, and design flexibility of the fiber bundle reinforcement structure, while also reducing the likelihood of direct stress-induced failure of the first fiber.

Description

Fiber bundle reinforced structure

A reinforcement structure, especially a fiber bundle reinforcement structure.

Fiber bundles are used in a wide range of applications due to their excellent mechanical properties and lightweight characteristics. However, these rigid fiber bundles often cannot effectively absorb and disperse the impact force when subjected to external shocks. This causes stress to concentrate in certain parts of the fiber bundle, increasing the risk of structural damage or rupture. This lack of shock absorption makes the structure more vulnerable to high-intensity external forces.

Furthermore, unreinforced fiber bundle structures are prone to accumulating fatigue stress over long periods of use or repeated loading, leading to gradual structural damage or failure. Due to the lack of flexible material to distribute fatigue stress, the durability of these fiber bundle structures is significantly reduced when subjected to long-term use or repeated loading.

In view of this, developing a fiber bundle reinforced structure is the goal of research in related fields.

To address the problem of rigid fiber bundles lacking flexibility, the present invention provides a fiber bundle reinforcement structure comprising: a first fiber, comprising a plurality of continuous fibers forming a continuous fiber bundle; and a second fiber, comprising a continuous fiber having less rigidity than the first fiber, bonded to the first fiber, and unevenly distributed throughout the cross-section of the continuous fiber bundle.

The density of the second fiber is distributed in a gradient manner on the first fiber.

The density of the second fiber is gradually distributed within the first fiber, with the density of the second fiber increasing on the surface of the first fiber and decreasing within the first fiber.

Furthermore, the first fiber includes a side A and a side B, wherein the side A and the side B are both single sides of the first fiber, wherein the side A and the side B are located on opposite sides of the first fiber.

Furthermore, the second fiber is concentratedly distributed on the A side of the first fiber, and the second fiber is exposed on a portion of the surface of the A side.

Furthermore, the second fiber is concentratedly distributed on the A side and the B side of the first fiber, and the second fiber is exposed on two partial surfaces of the first fiber.

Furthermore, the second fibers are concentratedly distributed on four opposite sides of the first fiber, and the second fibers are exposed on four partial surfaces of the first fiber, wherein the four partial surfaces of the first fiber are non-adjacent and are evenly and equidistantly distributed.

The first fiber includes a continuous ceramic fiber bundle, a continuous silicon carbide fiber bundle, or a continuous carbon fiber bundle.

Wherein, the second fiber includes aramid fiber, polymer fiber, metal fiber or glass fiber.

Furthermore, the first fiber and the second fiber are combined by thermal fusion, co-extrusion, bonding or impregnation.

Based on the above content, this invention provides the following effects:

1. The second fibers enhance the impact resistance of the fiber bundle reinforced structure. The flexibility of the second fibers 12 enables the fiber bundle reinforced structure to effectively absorb and disperse the impact when subjected to external forces, thereby reducing the concentration of stress on the first fibers and extending the service life of the fiber bundle reinforced structure. Furthermore, the distribution of the second fibers can provide impact absorption effects in different locations according to the different application requirements of the fiber bundle reinforced structure.

2. The second fiber improves the fatigue resistance of the fiber bundle reinforced structure. The second fiber can effectively disperse the stress generated under repeated loading, thereby increasing the durability of the fiber bundle reinforced structure under long-term use, further enabling the fiber bundle reinforced structure to maintain stable performance in a repeated loading environment.

3. The second fiber improves the formability and processability of the fiber bundle-reinforced structure. This is particularly true when manufacturing complex shapes, or when conforming to curved surfaces or requiring impact resistance. The second fiber provides greater flexibility and adaptability, thereby enhancing the structural consistency and performance of the fiber bundle-reinforced structure.

10: Fiber bundle reinforcement structure

11: First fiber

111:A side

112: Side B

12: Second fiber

N: Stress

Figure 1 is a schematic diagram of the fracture of the present invention.

Figure 2 is a schematic diagram of the preferred first embodiment of the present invention.

Figure 3 is a schematic diagram of the second preferred embodiment of the present invention.

Figure 4 is a cross-sectional view of the third preferred embodiment of the present invention.

The present invention provides a fiber bundle reinforcement structure 10, which includes a first fiber 11 and a second fiber 12 that reinforces the first fiber 11.

The fiber bundle reinforcement structure 10 is further formed by combining the first fiber 11 and the second fiber 12, and then curing the first fiber 11 containing the second fiber 12 through a curing method to form the fiber bundle reinforcement structure 10.

Preferably, a method of combining the first fiber 11 and the second fiber 12 includes thermal fusion, co-extrusion, bonding, or impregnation.

Preferably, the curing method includes resin infiltration curing, prepreg curing, thermal curing, cold press curing, chemical curing or light curing.

The first fiber 11 comprises a plurality of continuous fibers, which are formed into a continuous fiber bundle. The continuous fibers 11 can be formed by a physical or chemical method. The physical method includes winding, braiding, binding, spinning, melting, or extrusion, and the chemical method includes bonding, polymerization, curing, or impregnation. Furthermore, the continuous fiber can be made of a relatively rigid carbon fiber, ceramic fiber, or silicon carbide fiber. In a preferred embodiment of the present invention, the continuous fiber is a continuous carbon fiber, and the first fiber 11 is a continuous carbon fiber bundle.

Referring to Figure 1, the first fiber 11 includes a side A 111 and a side B 112. Side A 111 and side B 112 are both single sides of the first fiber 11. Side A 111 and side B 112 are located on opposite sides of the first fiber 11. When a stress N is applied to side A 111 of the first fiber 11, the stress N is transmitted along the first fiber. The stress N is transmitted to the B-side 112. Since the first fiber 11 has greater rigidity, it exhibits a greater resistance to deformation when subjected to the stress N. This results in a lower degree of deformation of the first fiber 11, concentrating the stress N on the B-side 112. When the stress N exceeds the strength limit of the first fiber 11, the B-side 112 fractures.

The second fibers 12 are continuous fibers, having lower rigidity than the first fibers 11 and exhibiting flexibility. The second fibers 12 are concentrated in at least one portion of the first fibers 11 and unevenly distributed toward an axis of the first fibers 11. Together with the first fibers 11, they form the fiber bundle reinforcement structure 10. The distribution of the second fibers 12 enhances the impact resistance and fatigue resistance of the first fibers 11, as well as improves stress distribution.

Furthermore, the second fibers 12 are concentrated on at least one side of the first fibers 11, but are unevenly distributed on the first fibers 11. Preferably, the density of the second fibers 12 is distributed on the side of the first fibers 11 in a gradient, wherein the density of the second fibers 12 is distributed on the first fibers 11 in a gradually decreasing manner, with the density of the second fibers 12 increasing on the surface of the first fibers 11 and decreasing in the interior of the first fibers 11.

Preferably, the material of the second fiber 12 includes aramid fiber, polymer fiber or metal fiber. In a preferred embodiment of the present invention, the second fiber 12 is glass fiber.

Preferably, referring to FIG. 2 , the second fibers 12 are concentrated on the A-side 111 of the first fiber 11, with at least a portion of the second fibers 12 exposed on a portion of the surface of the A-side 111. A plurality of the second fibers 12 are coupled to the first fiber 11 along a length direction of the first fiber 11, wherein the second fibers 12 are concentrated on the A-side 111. In this way, when stress N is applied to one surface of side A 111, the second fiber 12 effectively disperses the stress N while also absorbing a portion of it. This reduces the concentration of stress N on side A 111 of the first fiber 11 and effectively disperses the stress N within the first fiber 11, reducing the concentration of stress N on side B 112. This further delays or reduces the risk of fracture of the first fiber 11.

Furthermore, the second fibers 12 protrude from the surface of the A-side 111, further enhancing the impact resistance and fatigue resistance of the surface of the A-side 111 of the first fibers 11. When stress N acts on the A-side, the flexibility of the second fibers 12 enhances the first fibers 11's additional protection and deformation capacity, making the first fibers 11 more adaptable to the stress N. Furthermore, the flexibility of the second fibers 12 can withstand the deformation caused by the stress N. While dispersing the stress N, the second fibers 12 significantly reduce the concentration of stress N on the surface of the A-side 111, thereby improving the durability and reliability of the overall structure of the first fibers 11 and further extending the life of the first fibers 11.

Furthermore, the placement of the second fibers 12 within the first fibers 11 enhances the formability of the fiber bundle reinforcement structure 10, making it more resilient to unidirectional bending and stress during the manufacturing process, thereby ensuring consistency and enhanced structural performance.

Preferably, the fiber bundle reinforcement structure 10 is suitable for use in sports equipment, protective gear, or supporting components.

Preferably, referring to FIG. 3 , the second fibers 12 are concentrated on opposite sides of the first fiber 11, with at least two portions of the second fibers 12 exposed on two surfaces of the first fiber 11. A plurality of the second fibers 12 are bonded to the first fiber 11 along the length of the first fiber 11, with the second fibers 12 concentrated on the A side 111 and the B side 112. Thus, when the surfaces of the A side 111 and the B side 112 are subjected to the stress N, the stress N forms a balanced stress distribution structure between the A side 111 and the B side 112. When stress N acts on the A side 111 and the B side 112, the second fiber 12 will simultaneously absorb and disperse part of the stress, thereby reducing the concentration of the stress N.

By dispersing the stress N through the second fiber 12, the stress N is more evenly transmitted throughout the entire structure of the first fiber 11, effectively reducing the concentration of stress N on the first fiber 11. Furthermore, during the application of stress N, the elasticity of the second fiber 12 partially absorbs the stress, thereby reducing the direct impact of stress N on the first fiber 11. This further mitigates the direct effect of stress N on the first fiber 11, allowing the first fiber 11 to withstand repeated loads and improving the durability and performance of the overall structure of the first fiber 11.

Furthermore, the placement of the second fibers 12 within the first fibers 11 enhances the formability and processability of the fiber bundle reinforcement structure 10, making it more adaptable to repeated bending during the manufacturing process and making the fiber bundle reinforcement structure 10 more resilient.

Preferably, the fiber bundle reinforcement structure 10 is suitable for use in sports poles, building seismic systems, or vehicle body support structures.

Preferably, referring to Figure 4 , the second fibers 12 are concentrated and evenly distributed on four opposite sides of the first fiber 11, with at least four portions of the second fibers 12 exposed on four surfaces of the first fiber 11. These four surfaces are not adjacent and are evenly and equidistantly distributed. This arrangement of the second fibers 12 allows the first fiber 11 to be subjected to an irregular stress N, allowing the second fibers 12 in each of the four sections to uniformly absorb and disperse the stress N. Simultaneously, the stress N is directed toward the center of the more rigid first fiber 11 and then dispersed in any direction within the first fiber 11.

The second fiber 12 acts together to resist the stress N on the first fiber 11 and distributes the stress N throughout the first fiber 11, thereby improving the first fiber 11's resistance to external impact and reducing damage caused by the concentration of stress N. Furthermore, through the flexibility of the second fiber 12, a deformation force is applied to the surface of the first fiber 11. When the first fiber 11 faces higher stress N, the second fiber 12 significantly reduces the risk of instantaneous fracture of the first fiber 11, thereby improving the safety performance of the first fiber 11 and extending its service life.

Furthermore, the second fiber 12 enables the first fiber 11 to better conform to complex shapes and curved surfaces, enhancing the toughness and reliability of the first fiber 11 and making it more resistant to shock during the manufacturing process.

Preferably, the fiber bundle reinforced structure 10 is suitable for use in brackets and bases for precision instruments, support structures for large machinery, or plate-shaped sports equipment.

Furthermore, a self-repairing agent or microcapsule can be added to the second fiber 12. When the fiber bundle reinforcement structure 10 is locally damaged, the second fiber 12 can release the self-repairing agent or microcapsule through heating or chemical means, thereby increasing the service life of the fiber bundle reinforcement structure 10.

According to the present invention, the fiber bundle reinforcement structure 10 has the following effects through the distribution of the second fiber 12 in the first fiber 11:

1. The second fibers 12 enhance the impact resistance of the fiber bundle reinforced structure 10. The flexibility of the second fibers 12 enables the fiber bundle reinforced structure 10 to effectively absorb and disperse the impact force when subjected to external forces, thereby reducing the concentration of stress on the first fibers 11 and extending the service life of the fiber bundle reinforced structure 10. Furthermore, the distribution of the second fibers 12 can provide impact absorption effects in different locations according to the different application requirements of the fiber bundle reinforced structure 10.

2. The second fibers 12 improve the fatigue resistance of the fiber bundle reinforced structure 10. The second fibers 12 can effectively disperse the stress generated under repeated loading, thereby increasing the durability of the fiber bundle reinforced structure 10 under long-term use and further enabling the fiber bundle reinforced structure 10 to maintain stable performance in a repeated loading environment.

3. The second fibers 12 enhance the formability and processability of the fiber bundle-reinforced structure 10. This is particularly true when manufacturing complex shapes, or when conforming to curved surfaces or requiring impact resistance. The second fibers 12 provide greater flexibility and adaptability, thereby enhancing the structural consistency and performance of the fiber bundle-reinforced structure 10.

10: Fiber bundle reinforcement structure

11: First fiber

111:A side

112: Side B

N: Stress

Claims (10)

A fiber bundle reinforcement structure comprises: a first fiber, which is a continuous fiber bundle formed by arranging a plurality of continuous fibers along a length direction; and a second fiber, which is a continuous fiber arranged along the length direction and bonded to at least a portion of the surface of the first fiber, wherein the rigidity of the second fiber is less than that of the first fiber, the second fiber is unevenly distributed toward an axis of the first fiber, and together with the first fiber forms the fiber bundle reinforcement structure, and the second fiber is unevenly distributed in the cross section of the fiber bundle reinforcement structure. In the fiber bundle reinforced structure as described in claim 1, the density of the second fiber is distributed in a gradient manner in the first fiber. In the fiber bundle reinforced structure as described in claim 2, the density of the second fiber is distributed gradually from large to small in the first fiber, wherein the density of the second fiber is greater on the surface of the first fiber and is smaller in the interior of the first fiber. In the fiber bundle reinforced structure as described in claim 3, the first fiber includes an A side and a B side, and the A side and the B side are both single sides of the first fiber, wherein the A side and the B side are located on opposite sides of the first fiber. In the fiber bundle reinforced structure as described in claim 4, the second fiber is concentratedly distributed on the A side of the first fiber, and the second fiber is exposed on a portion of the surface of the A side. In the fiber bundle reinforced structure as described in claim 4, the second fiber is concentratedly distributed on the A side and the B side of the first fiber, and the second fiber is exposed on two partial surfaces of the first fiber. In the fiber bundle reinforced structure as described in claim 3, the second fiber is concentratedly distributed on four opposite sides of the first fiber, and the second fiber is exposed on four partial surfaces of the first fiber, wherein the four partial surfaces of the first fiber are not adjacent to each other and are evenly and equidistantly distributed. In the fiber bundle reinforced structure as described in any one of claims 1 to 7, the first fiber comprises a continuous ceramic fiber bundle, a continuous silicon carbide fiber bundle, or a continuous carbon fiber bundle. In the fiber bundle reinforced structure as described in claim 8, the second fiber comprises aramid fiber, metal fiber or glass fiber. In the fiber bundle reinforced structure as described in claim 9, the bonding method of the first fiber and the second fiber includes thermal fusion, co-extrusion, bonding or impregnation.