Hedgehog-thorn-imitating three-dimensional fiber three-dimensional woven composite material and preparation method thereof

Abstract

The invention discloses a hedgehog-like thorn three-dimensional fiber three-dimensional woven composite material and a preparation method thereof. The composite material comprises at least two resin layers, at least two woven fiber layers and at least one connecting fiber layer, the connecting fiber layer comprises a plurality of strip-shaped attaching fibers; the winding part of the strip-shaped attaching fiber is positioned between the one-way strip-shaped fiber and the one-way fiber; and the non-winding part of the strip-shaped attaching fiber is attached to the other non-winding part of the strip-shaped attaching fiber. The woven fiber layer and the resin layer are of a rigid structure, the connecting fiber layer is of a flexible structure, and the woven fiber layer and the connecting fiber layer cooperate with each other and have excellent performance in the aspects of force bearing, load resistance, bending resistance, specific strength, specific buckling strength and the like. In addition, the one-way ribbon fibers and the one-way fibers are interwoven to form a woven fiber layer; the strip-shaped attaching fibers are interwoven on the one-way fibers of the two woven fiber layers to form the connecting fiber layer, and the strip-shaped attaching fibers are attached to each other, so that the effects of toughening and delaying buckling are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of fiber composite materials, and in particular to a three-dimensional fiber stereoscopic woven composite material imitating hedgehog thorns and a preparation method thereof. Background Art

[0002] Fiber reinforced composite materials have wide and diverse applications in many fields. Their advantages are high specific strength and modulus, easy preparation, high design flexibility, good fatigue and corrosion resistance, good thermal expansion performance, and good economic benefits.

[0003] With the expansion of the application fields of fiber reinforced composite materials, higher requirements are put forward for the specific buckling strength, buckling load, etc. of fiber reinforced composite materials. The specific buckling strength and buckling load of fiber reinforced composite materials in the prior art need to be improved.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a three-dimensional fiber woven composite material imitating hedgehog thorns and a preparation method thereof are provided, aiming to solve the problem that the specific buckling strength and buckling load of the fiber reinforced composite materials in the prior art need to be improved.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] A three-dimensional fiber woven composite material imitating hedgehog thorns, comprising: at least two resin layers, at least two woven fiber layers and at least one connecting fiber layer; the woven fiber layer is embedded in the resin layer; the woven fiber layer is interwoven by unidirectional ribbon fibers and unidirectional fibers; wherein the connecting fiber layer comprises:

[0008] A plurality of band-shaped adjacent fibers are respectively wound around the unidirectional fibers of two adjacent woven fiber layers along the extending direction of the unidirectional band-shaped fibers;

[0009] Wherein, the winding portion of the band-shaped abutting fiber is located between the unidirectional band-shaped fiber and the unidirectional fiber;

[0010] The non-twisted portion of the strip-shaped abutting fiber abuts against another non-twisted portion.

[0011] The hedgehog spine-imitating three-dimensional fiber stereoscopic woven composite material, wherein the floating and sinking states of two adjacent unidirectional ribbon fibers in the woven fiber layer are different.

[0012] The three-dimensional fiber woven composite material imitating hedgehog thorns, wherein the winding part comprises: a first winding part and a second winding part;

[0013] The non-winding portion includes: a first non-winding portion and a second non-winding portion;

[0014] Wherein, the first winding part and the second winding part respectively wind the unidirectional fibers of two adjacent woven fiber layers;

[0015] The first winding portion, the first non-winding portion, the second non-winding portion and the second winding portion are connected in sequence;

[0016] Two adjacent first non-wrapped portions are in contact with each other, and two adjacent second non-wrapped portions are in contact with each other.

[0017] The three-dimensional fiber stereoscopic woven composite material imitating hedgehog thorns, wherein the unidirectional fibers are in a straight line shape, and the unidirectional ribbon fibers are in a corrugated shape.

[0018] The three-dimensional fiber stereoscopic woven composite material imitating hedgehog thorns, wherein the unidirectional ribbon fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber;

[0019] The unidirectional fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber;

[0020] The strip-shaped adjacent fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber.

[0021] A method for preparing a three-dimensional fiber woven composite material imitating hedgehog spines as described in any one of the above, comprising the steps of:

[0022] Provide fiber, ribbon fiber and resin materials;

[0023] A layer of fibers is fixed as a first layer of unidirectional fibers, and ribbon fibers are woven on the basis of the first layer of unidirectional fibers to form a first layer of unidirectional ribbon fibers and a first layer of ribbon-shaped adjacent fibers;

[0024] Applying a resin material on the woven fiber layer formed by the first layer of unidirectional fibers and the first layer of unidirectional ribbon fibers and curing the resin material;

[0025] A layer of fibers is fixed on the basis of the previous layer of band-shaped adjacent fibers as the next layer of unidirectional fibers, and band-shaped fibers are woven on the basis of the next layer of unidirectional fibers to form the next layer of unidirectional band-shaped fibers and the next layer of band-shaped adjacent fibers;

[0026] coating a resin material on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and curing the resin material;

[0027] A layer of fibers is fixed on the basis of the previous layer of ribbon-shaped adjacent fibers as the last layer of unidirectional fibers, and ribbon-shaped fibers are woven on the basis of the last layer of unidirectional fibers to form the last layer of unidirectional ribbon fibers;

[0028] A resin material is coated on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and cured to obtain a three-dimensional fiber woven composite material imitating hedgehog thorns.

[0029] The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines, wherein a layer of fibers is fixed as the first layer of unidirectional fibers, and ribbon fibers are woven on the basis of the first layer of unidirectional fibers to form the first layer of unidirectional ribbon fibers and the first layer of ribbon-shaped adjacent fibers, comprises:

[0030] A layer of fibers is fixed as the first layer of unidirectional fibers;

[0031] On the basis of the first layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving steps of the second band-shaped fibers and the third band-shaped fibers are formed to form the first layer of unidirectional band-shaped fibers and the first layer of band-shaped adjacent fibers; wherein the first band-shaped fibers and the second band-shaped fibers are both closely attached to the first layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the first layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked.

[0032] The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines, wherein a layer of fibers is fixed on the basis of the previous layer of strip-shaped adjacent fibers as the next layer of unidirectional fibers, and strip-shaped fibers are woven on the basis of the next layer of unidirectional fibers to form the next layer of unidirectional strip-shaped fibers and the next layer of strip-shaped adjacent fibers, comprising:

[0033] Pass the fiber through the third ribbon fiber of the previous layer and fix it to serve as the unidirectional fiber of the next layer;

[0034] On the basis of the latter layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving steps of the second band-shaped fibers and the third band-shaped fibers are formed to form the latter layer of unidirectional band-shaped fibers and the latter layer of band-shaped adjacent fibers; wherein, in the latter layer, the first band-shaped fibers and the second band-shaped fibers are both closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked; the floating and sinking states of the first band-shaped fibers of the latter layer and the third band-shaped fibers of the previous layer are the same and are stacked.

[0035] The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines, wherein a layer of fibers is fixed on the basis of the previous layer of strip-shaped adjacent fibers as the last layer of unidirectional fibers, and strip-shaped fibers are woven on the basis of the last layer of unidirectional fibers to form the last layer of unidirectional strip-shaped fibers, comprising:

[0036] The fiber is passed through the third ribbon fiber of the previous layer and fixed to form the final layer of unidirectional fiber;

[0037] On the basis of the last layer of unidirectional fibers, after repeating the floating and sinking interweaving of the first ribbon fibers, the floating and sinking interweaving of the second ribbon fibers is formed to form the last layer of unidirectional ribbon fibers; wherein, in the last layer, the first ribbon fibers and the second ribbon fibers are both close to the latter layer of unidirectional fibers, and the floating and sinking states of the first ribbon fibers and the second ribbon fibers are different; the floating and sinking states of the first ribbon fibers of the last layer and the third ribbon fibers of the previous layer are the same and are stacked.

[0038] The method for preparing the three-dimensional fiber stereoscopic woven composite material imitating hedgehog thorns, wherein the resin material is cured by heating.

[0039] Beneficial effects: The woven fiber layer and the resin layer are rigid structures, and the connecting fiber layer is flexible. The two work together to have excellent performance in terms of load bearing, load resistance, bending resistance, specific strength, specific buckling strength, etc. In addition, the unidirectional ribbon fibers and the unidirectional fibers are interwoven to form a woven fiber layer; the ribbon-shaped adjacent fibers are interwoven on the unidirectional fibers of the two woven fiber layers to form a connecting fiber layer, and the ribbon-shaped adjacent fibers are adjacent to each other, thereby having the effect of toughening and delaying buckling. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a scanning electron microscope image of the internal microscopic structure of a hedgehog spine.

[0041] Figure 2 It is a schematic structural diagram of a three-dimensional woven composite material of imitating hedgehog spines in an embodiment of the present invention.

[0042] Figure 3 It is a side view of the woven fiber layer and the connecting fiber layer in the embodiment of the present invention.

[0043] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0044] Figure 5 Schematic diagram of the first layer prepared in an embodiment of the present invention.

[0045] Figure 6 It is a schematic diagram of fixing a subsequent layer of unidirectional fibers after the first layer is prepared in an embodiment of the present invention.

[0046] Figure 7 Schematic diagram of the preparation of the first layer and the second layer in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 10. Resin layer; 20. Braided fiber layer; 21. Unidirectional ribbon fibers; 22. Unidirectional fibers; 30. Connecting fiber layer; 31. Ribbon-shaped adjacent fibers; 311. Wrapped portion; 3111. First wrapped portion; 3112. Second wrapped portion; 312. Non-wrapped portion; 3121. First non-wrapped portion; 3122. Second non-wrapped portion. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] Please also see Figure 1-Figure 4 The present invention provides some embodiments of a three-dimensional fiber woven composite material imitating hedgehog thorns.

[0051] Natural materials have complex designs, including nanofiber arrangement and fine gradient construction, and these structural organizations can largely meet the functional requirements of the living environment for biomaterials. There are significant advantages in manufacturing new functional structural parts that imitate natural tissues. New functional structural parts prepared by imitating natural tissues are expected to have high strength, high toughness, and lightweight synergistic properties.

[0052] After a long period of evolution, the hedgehog has developed light and strong spines through cruel natural selection. Although a single spine weighs about 4 mg, the external load it can withstand is 5 to 6 orders of magnitude of its own gravity. Its specific strength (0.94 N / mg) is greater than that of a 201 stainless steel rod of the same diameter (0.53 N / mg), and it has excellent light weight and high strength properties. In particular, the hedgehog spines demonstrate extraordinary mechanical efficiency through ingenious and efficient material structure design, and have higher specific stiffness and specific buckling strength.

[0053] like Figure 2 As shown, the hedgehog thorn-like three-dimensional fiber stereoscopic woven composite material of the present invention comprises: at least two resin layers 10, at least two woven fiber layers 20 and at least one connecting fiber layer 30; the woven fiber layer 20 is embedded in the resin layer 10; the woven fiber layer 20 is formed by floating and sinking interweaving of unidirectional ribbon fibers 21 and unidirectional fibers 22; the connecting fiber layer 30 comprises:

[0054] A plurality of band-shaped adjacent fibers 31 are respectively wound around the unidirectional fibers 22 of two adjacent woven fiber layers 20 along the extending direction of the unidirectional band-shaped fibers 21;

[0055] The winding portion 311 of the band-shaped abutting fiber 31 is located between the unidirectional band-shaped fiber 21 and the unidirectional fiber 22 ; the non-winding portion 312 of the band-shaped abutting fiber 31 is abutted against another non-winding portion 312 .

[0056] Specifically, the composite material of the present application is made by imitating the thorns of a hedgehog, and the thorns of a hedgehog are cylindrical, and their cross-section is as follows: Figure 1 As shown, Figure 1 The middle scale is 250 μm. The outer layer of hedgehog spines has axial and radial structures, while the inner layer of hedgehog spines has radial structures, and the radial structures are close to each other. Figure 2 As shown, the dotted line represents the resin layer 10. The woven fiber layer 20 and the resin layer 10 of the present application imitate the outer layer of hedgehog spines, the unidirectional fibers 22 imitate the axial structure of the outer layer, and the unidirectional ribbon fibers 21 imitate the radial structure of the outer layer; the connecting fiber layer 30 imitates the inner layer of hedgehog spines, and the ribbon-shaped adjacent fibers 31 imitate the radial structure of the inner layer.

[0057] The woven fiber layer 20 and the resin layer 10 are rigid structures, and the connecting fiber layer 30 is flexible. The two work together to have excellent performance in terms of load bearing, load resistance, bending resistance, specific strength, specific buckling strength, etc. The unidirectional ribbon fibers 21 and the unidirectional fibers 22 are interwoven to form the woven fiber layer 20; the ribbon-shaped abutting fibers 31 are interwoven on the unidirectional fibers 22 of the two layers of the woven fiber layers 20 to form the connecting fiber layer 30, and the ribbon-shaped abutting fibers 31 are abutted against each other, thereby having the effect of toughening and delaying buckling.

[0058] The unidirectional fibers 22 extend along a first direction, and the unidirectional ribbon fibers 21 extend along a second direction. The first direction and the second direction are different directions, for example, the first direction and the second direction are perpendicular to each other. The ribbon-shaped abutting fibers 31 extend along the second direction, and are alternately wound between the unidirectional fibers 22 of two adjacent woven fiber layers 20. The winding portion 311 of the ribbon-shaped abutting fibers 31 is located between the unidirectional fibers 22 and the unidirectional ribbon-shaped fibers 21, and is clamped and fixed by the unidirectional fibers 22 and the unidirectional ribbon-shaped fibers 21. The non-winding portions 312 of the ribbon-shaped abutting fibers 31 can abut against each other, so that the entire ribbon-shaped abutting fibers 31 have a supporting effect on the woven fiber layer 20 and the resin layer 10.

[0059] In the hedgehog thorn-like three-dimensional fiber stereo woven composite material of the present application, the woven fiber layer and resin layer of the outer cortex of the hedgehog thorn are tightly connected with the internal connecting fiber layer, so that the resin layer can transfer most of the stress to produce higher buckling load and greater elastic strain, thereby enhancing toughness; when subjected to external force, compression-dominated deformation and asymmetric fracture of the wall surface can be generated, while achieving high stiffness and high energy absorption; in addition, the three-dimensional integrated fiber distribution morphology reduces the internal stress concentration effect of the porous structure, promotes greater chamber pressure stress and more significant densification, and provides a strategy for the design of low-density, high-rigidity and damage-resistant three-dimensional fiber composite material structures.

[0060] In a preferred implementation of the embodiment of the present invention, Figure 2 As shown, the floating and sinking states of two adjacent unidirectional ribbon fibers 21 in the woven fiber layer 20 are different.

[0061] Specifically, the floating and sinking states of two adjacent unidirectional ribbon fibers 21 are different, and the floating and sinking states of two alternate unidirectional ribbon fibers 21 are the same. The floating and sinking state of the first unidirectional ribbon fiber 21 is different from the floating and sinking state of the second unidirectional ribbon fiber 21, and the floating and sinking state of the first unidirectional ribbon fiber 21 is the same as the floating and sinking state of the third unidirectional ribbon fiber 21. Other floating and sinking interlacing methods can also be used, for example, the floating and sinking state of the first unidirectional ribbon fiber 21 is the same as the floating and sinking state of the second unidirectional ribbon fiber 21, the floating and sinking state of the third unidirectional ribbon fiber 21 is the same as the floating and sinking state of the fourth unidirectional ribbon fiber 21, and the floating and sinking state of the second unidirectional ribbon fiber 21 is different from the floating and sinking state of the third unidirectional ribbon fiber 21.

[0062] In a preferred implementation of the embodiment of the present invention, Figure 2-Figure 4 As shown, the winding portion 311 includes: a first winding portion 3111 and a second winding portion 3112; the non-winding portion 312 includes: a first non-winding portion 3121 and a second non-winding portion 3122;

[0063] Among them, the first winding portion 3111 and the second winding portion 3112 are respectively wound around the unidirectional fibers 22 of two adjacent woven fiber layers 20; the first winding portion 3111, the first non-winding portion 3121, the second non-winding portion 3122 and the second winding portion 3112 are connected in sequence; two adjacent first non-winding portions 3121 are in contact with each other, and two adjacent second non-winding portions 3122 are in contact with each other.

[0064] Specifically, the band-shaped adjacent fiber 31 has a winding portion 311 and a non-winding portion 312, the winding portion 311 is wound on the single-phase fiber, and the non-winding portions 312 are mutually adjacent. The winding portion 311 has a first winding portion 3111 and a second winding portion 3112. The first winding portion 3111 is wound around the unidirectional fiber 22 of one woven fiber layer 20, and the second winding portion 3112 is wound around the unidirectional fiber 22 of another woven fiber layer 20. The non-winding portion 312 has a first non-winding portion 3121 and a second non-winding portion 3122, the first non-winding portion 3121 is close to the first winding portion 3111, and the second non-winding portion 3122 is close to the second winding portion 3112. In the band-shaped adjacent fiber 31, the first winding portion 3111, the first non-winding portion 3121, the second non-winding portion 3122, the second winding portion 3112, the second non-winding portion 3122, the first non-winding portion 3121, and the first winding portion 3111 are connected in sequence. Two adjacent first non-wrapped portions 3121 are in contact with each other, and the two first non-wrapped portions 3121 are not close to the same first wrapped portion 3111. A first non-wrapped portion 3121 close to a first wrapped portion 3111 and a first non-wrapped portion 3121 close to another adjacent first wrapped portion 3111 are in contact with each other. Two adjacent second non-wrapped portions 3122 are in contact with each other, and the two second non-wrapped portions 3122 are not close to the same second wrapped portion 3112. A second non-wrapped portion 3122 close to a second wrapped portion 3112 and a second non-wrapped portion 3122 close to another adjacent second wrapped portion 3112 are in contact with each other.

[0065] In a preferred implementation of the embodiment of the present invention, Figure 2-Figure 3 As shown, the unidirectional fiber 22 is in a straight line shape, and the unidirectional ribbon fiber 21 is in a corrugated shape.

[0066] Specifically, the unidirectional fibers 22 may be in a straight line shape, and the unidirectional ribbon fibers 21 may be in a corrugated shape. The unidirectional ribbon fibers 21 float and sink relative to the unidirectional fibers 22 and present a corrugated shape.

[0067] In a preferred implementation of an embodiment of the present invention, the unidirectional ribbon fiber 21 is one of carbon fiber, basalt fiber, aramid fiber, and Kevlar fiber; the unidirectional fiber 22 is one of carbon fiber, basalt fiber, aramid fiber, and Kevlar fiber; the ribbon-shaped adjacent fiber 31 is one of carbon fiber, basalt fiber, aramid fiber, and Kevlar fiber.

[0068] Specifically, the unidirectional fibers 22, the unidirectional ribbon fibers 21, and the ribbon-shaped adjacent fibers 31 may be the same fibers or different fibers. The unidirectional ribbon fibers 21 and the ribbon-shaped adjacent fibers 31 are both ribbon fibers, which may be shaped by fiber bundles to obtain ribbon fibers.

[0069] Based on any one of the above embodiments of the three-dimensional fiber woven composite material imitating hedgehog thorns, the present invention also provides a preferred embodiment of a method for preparing the three-dimensional fiber woven composite material imitating hedgehog thorns:

[0070] The method for preparing the hedgehog spines-imitating three-dimensional fiber stereoscopic woven composite material according to the embodiment of the present invention comprises the following steps:

[0071] Step S100, providing fibers, ribbon fibers and resin materials;

[0072] Step S200, fixing a layer of fibers as a first layer of unidirectional fibers, and weaving ribbon fibers on the basis of the first layer of unidirectional fibers to form a first layer of unidirectional ribbon fibers and a first layer of ribbon-shaped adjacent fibers;

[0073] Step S300, coating a resin material on the woven fiber layer formed by the first layer of unidirectional fibers and the first layer of unidirectional ribbon fibers and curing the resin material;

[0074] Step S400, fixing a layer of fibers on the basis of the previous layer of strip-shaped adjacent fibers as the next layer of unidirectional fibers, and weaving strip-shaped fibers on the basis of the next layer of unidirectional fibers to form the next layer of unidirectional strip-shaped fibers and the next layer of strip-shaped adjacent fibers;

[0075] Step S500, coating a resin material on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and curing the resin material;

[0076] Step S600, fixing a layer of fibers on the basis of the previous layer of strip-shaped adjacent fibers as the last layer of unidirectional fibers, and weaving strip-shaped fibers on the basis of the last layer of unidirectional fibers to form the last layer of unidirectional strip-shaped fibers;

[0077] Step S700: coating a resin material on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and curing the resin material to obtain a three-dimensional fiber woven composite material imitating hedgehog thorns.

[0078] Specifically, a composite material is prepared layer by layer. After weaving a woven fiber layer and a connecting fiber layer, a resin material is coated on the woven fiber layer and cured to form a resin layer; then after weaving the next woven fiber layer and the connecting fiber layer, a resin material is coated on the next woven fiber layer and cured to form the next resin layer, until the last woven fiber layer and the last resin layer are completed, and a three-dimensional fiber stereoscopic woven composite material imitating hedgehog thorns is obtained. The number of woven fiber layers and the number of connecting fiber layers can be adjusted as needed. The resin material is cured by heating, and the heating temperature is determined according to the resin material. When coating the resin material, the strip-shaped adjacent fibers can be pushed aside and then coated with the resin material.

[0079] The entire composite material has at least two layers. If the composite material has two layers, namely the first layer and the last layer, after executing step S100 and step S200, executing step S600 and step S700, a two-layer composite material can be obtained. If the composite material has three or more layers, executing steps S100 to step S700 can obtain a three-layer or more composite material. The preparation process of each intermediate layer is the same, and they are all prepared by step S400 and step S500.

[0080] The preparation process of the first layer, the preparation process of the middle layer, and the preparation process of the last layer are slightly different. In the preparation process of the first layer, the first layer of unidirectional fibers is directly fixed. In the preparation process of the middle layer and the last layer, the middle layer unidirectional fibers and the last layer of unidirectional fibers are fixed on the basis of the previous layer of ribbon-like adjacent fibers to form unidirectional fibers, and the unidirectional fibers pass through the previous layer of ribbon-like adjacent fibers. In the preparation process of the last layer, it is not necessary to weave the last layer of ribbon-like adjacent fibers. In the preparation process of the first and middle layers, it is necessary to weave the first layer of ribbon-like adjacent fibers and the middle layer of ribbon-like adjacent fibers.

[0081] Step S200 specifically includes:

[0082] Step S210, fixing a layer of fibers as a first layer of unidirectional fibers;

[0083] Step S220, on the basis of the first layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving of the second band-shaped fibers and the third band-shaped fibers are performed to form a first layer of unidirectional band-shaped fibers and a first layer of band-shaped adjacent fibers; wherein the first band-shaped fibers and the second band-shaped fibers are both closely attached to the first layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the first layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked.

[0084] Specifically, Figure 5As shown, in the process of preparing the first layer, a layer of fibers is first fixed as the first layer of unidirectional fibers, and then the first layer of unidirectional ribbon fibers and the first layer of ribbon-shaped adjacent fibers are woven on the basis of the first layer of unidirectional fibers, and the resin material is coated and cured to complete the preparation of the first layer. In the process of preparing the first layer, the ribbon fibers can be used as the first layer of unidirectional ribbon fibers or as the first layer of ribbon-shaped adjacent fibers. The ribbon fibers are divided into three types, which are respectively recorded as the first ribbon fibers, the second ribbon fibers and the third ribbon fibers. The first ribbon fibers are used as a single first layer of unidirectional ribbon fibers and are not stacked with the third ribbon fibers. The second ribbon fibers are used as the first layer of stacked unidirectional ribbon fibers, and the third ribbon fibers are used as the first layer of ribbon-shaped adjacent fibers. The second ribbon fibers and the third ribbon fibers are stacked with each other. The number of the first ribbon fibers and the number of the second ribbon fibers can be the same or different. The number of the second ribbon fibers and the number of the third ribbon fibers are equal. For example, when it is necessary to reduce weight, the number of the first ribbon fibers can be increased, and the number of the second ribbon fibers can be reduced, and the number of the third ribbon fibers can also be reduced accordingly, the number of ribbon fibers used in the composite material as a whole is reduced, and the weight is reduced. When it is necessary to provide greater support, the number of the first ribbon fibers can be reduced, and the number of the second ribbon fibers can be increased, and the number of the third ribbon fibers can also be increased accordingly, the number of ribbon fibers used in the composite material as a whole is increased, the number of ribbon-shaped fibers formed by the third ribbon fibers is increased, and the support is increased.

[0085] Step S400 specifically includes:

[0086] Step S410, passing the fiber through the third ribbon fiber of the previous layer and fixing it to serve as the unidirectional fiber of the next layer;

[0087] Step S420, on the basis of the latter layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving of the second band-shaped fibers and the third band-shaped fibers are performed to form the latter layer of unidirectional band-shaped fibers and the latter layer of band-shaped abutting fibers; wherein, in the latter layer, the first band-shaped fibers and the second band-shaped fibers are both closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked; the floating and sinking states of the first band-shaped fibers of the latter layer and the third band-shaped fibers of the previous layer are the same and are stacked.

[0088] Specifically, Figure 6 and Figure 7As shown, in the process of preparing the middle layer, a layer of fibers is first fixed on the basis of the third ribbon fibers of the previous layer to serve as the unidirectional fibers of the next layer. The first ribbon fibers, the second ribbon fibers, and the third ribbon fibers are woven on the basis of the unidirectional fibers of the next layer. The first ribbon fibers, as the unidirectional ribbon fibers of the middle layer, are not stacked with the third ribbon fibers of this layer, but are stacked with the third ribbon fibers of the previous layer. The second ribbon fibers serve as the unidirectional ribbon fibers of the middle layer, and the third ribbon fibers serve as the ribbon-shaped contact fibers of the middle layer, and the second ribbon fibers and the third ribbon fibers are stacked on each other. For the middle layer, the first ribbon fibers and the second ribbon fibers are stacked with the third ribbon fibers of the previous layer and the next layer, respectively, to form a more uniform supporting force.

[0089] Step S600 specifically includes:

[0090] Step S610, passing the fiber through the third ribbon fiber of the previous layer and fixing it to serve as the last layer of unidirectional fiber;

[0091] Step S620, on the basis of the last layer of unidirectional fibers, after repeating the floating and sinking interweaving of the first ribbon fibers, the floating and sinking interweaving of the second ribbon fibers is performed to form the last layer of unidirectional ribbon fibers; wherein, in the last layer, the first ribbon fibers and the second ribbon fibers are both close to the last layer of unidirectional fibers, and the floating and sinking states of the first ribbon fibers and the second ribbon fibers are different; the floating and sinking states of the first ribbon fibers of the last layer and the third ribbon fibers of the previous layer are the same and are stacked.

[0092] Specifically, Figure 7 and Figure 1 As shown, in the process of preparing the last layer, a layer of fibers is now fixed on the basis of the third ribbon fibers of the previous layer to serve as the last layer of unidirectional fibers. Then the first ribbon fibers and the second ribbon fibers are woven on the last layer of unidirectional fibers. The first ribbon fibers and the second ribbon fibers are both used as the last layer of unidirectional ribbon fibers, but the difference is that the first ribbon fibers are stacked with the third ribbon fibers of the previous layer, and the second ribbon fibers are the last layer of unidirectional ribbon fibers alone.

[0093] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A three-dimensional fiber woven composite material imitating hedgehog thorns, comprising: at least two resin layers, at least two woven fiber layers, and at least one connecting fiber layer; The woven fiber layer is embedded in the resin layer; The woven fiber layer is formed by interweaving unidirectional ribbon fibers and unidirectional fibers; characterized in that the connecting fiber layer comprises: A plurality of band-shaped adjacent fibers are respectively wound around the unidirectional fibers of two adjacent woven fiber layers along the extending direction of the unidirectional band-shaped fibers; Wherein, the winding portion of the band-shaped abutting fiber is located between the unidirectional band-shaped fiber and the unidirectional fiber; The non-twisted portion of the strip-shaped abutting fiber abuts against another non-twisted portion.

2. The hedgehog thorn-like three-dimensional fiber stereoscopic woven composite material according to claim 1, characterized in that: The floating and sinking states of two adjacent unidirectional ribbon fibers in the woven fiber layer are different.

3. The hedgehog thorn-like three-dimensional fiber stereoscopic woven composite material according to claim 1, characterized in that: The winding part includes: a first winding part and a second winding part; The non-winding portion includes: a first non-winding portion and a second non-winding portion; Wherein, the first winding part and the second winding part respectively wind the unidirectional fibers of two adjacent woven fiber layers; The first winding portion, the first non-winding portion, the second non-winding portion and the second winding portion are connected in sequence; Two adjacent first non-wrapped portions are in contact with each other, and two adjacent second non-wrapped portions are in contact with each other.

4. The hedgehog thorn-like three-dimensional fiber stereoscopic woven composite material according to claim 1, characterized in that: The unidirectional fibers are in a straight line shape, and the unidirectional ribbon fibers are in a corrugated shape.

5. The hedgehog thorn-like three-dimensional fiber stereoscopic woven composite material according to claim 1, characterized in that: The unidirectional ribbon fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber; The unidirectional fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber; The strip-shaped adjacent fiber is one of carbon fiber, basalt fiber, aramid fiber and Kevlar fiber.

6. A method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines as claimed in any one of claims 1 to 5, characterized in that: Includes steps: Provide fiber, ribbon fiber and resin materials; A layer of fibers is fixed as a first layer of unidirectional fibers, and ribbon fibers are woven on the basis of the first layer of unidirectional fibers to form a first layer of unidirectional ribbon fibers and a first layer of ribbon-shaped adjacent fibers; Applying a resin material on the woven fiber layer formed by the first layer of unidirectional fibers and the first layer of unidirectional ribbon fibers and curing the resin material; A layer of fibers is fixed on the basis of the previous layer of band-shaped adjacent fibers as the next layer of unidirectional fibers, and band-shaped fibers are woven on the basis of the next layer of unidirectional fibers to form the next layer of unidirectional band-shaped fibers and the next layer of band-shaped adjacent fibers; coating a resin material on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and curing the resin material; A layer of fibers is fixed on the basis of the previous layer of ribbon-shaped adjacent fibers as the last layer of unidirectional fibers, and ribbon-shaped fibers are woven on the basis of the last layer of unidirectional fibers to form the last layer of unidirectional ribbon fibers; A resin material is coated on the woven fiber layer formed by the last layer of unidirectional fibers and the last layer of unidirectional ribbon fibers and cured to obtain a three-dimensional fiber woven composite material imitating hedgehog thorns.

7. The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines according to claim 6, characterized in that: The method of fixing a layer of fibers as the first layer of unidirectional fibers and weaving ribbon fibers on the basis of the first layer of unidirectional fibers to form the first layer of unidirectional ribbon fibers and the first layer of ribbon-shaped adjacent fibers comprises: A layer of fibers is fixed as the first layer of unidirectional fibers; On the basis of the first layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving steps of the second band-shaped fibers and the third band-shaped fibers are formed to form the first layer of unidirectional band-shaped fibers and the first layer of band-shaped adjacent fibers; wherein the first band-shaped fibers and the second band-shaped fibers are both closely attached to the first layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the first layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked.

8. The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines according to claim 7, characterized in that: The method of fixing a layer of fibers on the basis of the previous layer of band-shaped adjacent fibers as the next layer of unidirectional fibers, and weaving band-shaped fibers on the basis of the next layer of unidirectional fibers to form the next layer of unidirectional band-shaped fibers and the next layer of band-shaped adjacent fibers comprises: Pass the fiber through the third ribbon fiber of the previous layer and fix it to serve as the unidirectional fiber of the next layer; On the basis of the latter layer of unidirectional fibers, after repeatedly performing the floating and sinking interweaving of the first band-shaped fibers, the floating and sinking interweaving steps of the second band-shaped fibers and the third band-shaped fibers are formed to form the latter layer of unidirectional band-shaped fibers and the latter layer of band-shaped adjacent fibers; wherein, in the latter layer, the first band-shaped fibers and the second band-shaped fibers are both closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the first band-shaped fibers and the second band-shaped fibers are different, the third band-shaped fibers are partially closely attached to the latter layer of unidirectional fibers, the floating and sinking states of the second band-shaped fibers and the third band-shaped fibers are the same and are stacked; the floating and sinking states of the first band-shaped fibers of the latter layer and the third band-shaped fibers of the previous layer are the same and are stacked.

9. The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines according to claim 7, characterized in that: The method of fixing a layer of fibers on the basis of the previous layer of band-shaped adjacent fibers as the last layer of unidirectional fibers, and weaving band-shaped fibers on the basis of the last layer of unidirectional fibers to form the last layer of unidirectional band-shaped fibers, comprises: The fiber is passed through the third ribbon fiber of the previous layer and fixed to form the final layer of unidirectional fiber; On the basis of the last layer of unidirectional fibers, after repeating the floating and sinking interweaving of the first ribbon fibers, the floating and sinking interweaving of the second ribbon fibers is formed to form the last layer of unidirectional ribbon fibers; wherein, in the last layer, the first ribbon fibers and the second ribbon fibers are both close to the latter layer of unidirectional fibers, and the floating and sinking states of the first ribbon fibers and the second ribbon fibers are different; the floating and sinking states of the first ribbon fibers of the last layer and the third ribbon fibers of the previous layer are the same and are stacked.

10. The method for preparing the three-dimensional fiber woven composite material imitating hedgehog spines according to claim 6, characterized in that: The resin material is cured by heating.

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