Three-dimensional fabric laminated needled composite material and preparation method thereof

A three-dimensional fabric and composite material technology, applied in the field of fiber-reinforced composite materials, can solve the problems of poor designability of single-layer two-dimensional fabric structure, poor interlayer performance of composite materials, low interlayer shear strength, etc. The effect of high shear strength, good interlayer performance and few layers

Inactive Publication Date: 2020-10-09
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the following problems still exist in the application process of laminated composite materials: 1) The designability of the single-layer two-dimensional fabric structure is poor, and the thickness is thin. When preparing laminated composite materials, multiple layers are often required, so the production efficiency is low and the cost is high. High, and the prepared laminated composite material has no fiber connection between layers, and the interlayer shear strength is low; 2) Although the laminated composite material prepared by using multi-layer three-dimensional fabric can reduce the number of layers, it still cannot solve the interlayer performance of the composite material. bad question

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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  • Three-dimensional fabric laminated needled composite material and preparation method thereof
  • Three-dimensional fabric laminated needled composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The three-dimensional fabric laminated needle-punched composite material includes 10 layers of carbon fiber three-dimensional woven fabrics with a thickness of 0.3 mm and 9 layers with a density of 10 g / m 2 Carbon fiber staple felt. Firstly, the three-dimensional woven fabric and short fiber mat are laminated alternately, and then the front and back sides of the preform are needled at a density of 5 needles / cm 2 , using the RTM process to solidify the three-dimensional fabric laminated needle-punched preform to obtain a three-dimensional fabric laminated needle-punched composite material. Concrete preparation method is as follows:

[0028] (1) Alternately laminate 10 layers of carbon fiber three-dimensional woven fabrics and nine layers of carbon fiber short fiber mats, and lay a layer of short fiber mats between adjacent three-dimensional woven fabric layers;

[0029] (2) Place the alternately laminated three-dimensional woven fabric and short-fiber mat on a double-s...

Embodiment 2

[0034] The three-dimensional fabric laminated needle-punched composite material comprises 3 layers of glass fiber multi-axial warp knitted fabric with a thickness of 2 mm and 4 layers with a density of 50 g / m 2 Fiberglass staple fiber mat. First, the multi-axial warp knitted fabric and short fiber mat are alternately laminated, and then needle punched on the front and back of the preform at a needle punching density of 20 needles / cm 2 , using the VARI process to cure the three-dimensional fabric laminated needle-punched preform to obtain a three-dimensional fabric laminated needle-punched composite material. Concrete preparation method is as follows:

[0035] (1) 3 layers of glass fiber multiaxial warp knitted fabrics and 4 layers of glass fiber short fiber mats are alternately laminated, and 2 layers of short fiber mats are laid between adjacent three-dimensional woven fabric layers;

[0036] (2) Place the alternately laminated three-dimensional woven fabric and short fiber...

Embodiment 3

[0041] The three-dimensional fabric laminated needle-punched composite material comprises three layers of glass fiber three-dimensional woven fabrics with a thickness of 1.3 mm and two layers with a density of 80 g / m 2 Carbon fiber staple felt. Firstly, the three-dimensional woven fabric and short fiber mat are laminated alternately, and then needle punched on the front and back of the preform with a needle punching density of 30 needles / cm 2 , using the RTM process to solidify the three-dimensional fabric laminated needle-punched preform to obtain a three-dimensional fabric laminated needle-punched composite material. Concrete preparation method is as follows:

[0042](1) 3 layers of glass fiber three-dimensional woven fabrics and two layers of carbon fiber short fiber mats are alternately laminated, and a layer of short fiber mats is laid between adjacent three-dimensional woven fabric layers;

[0043] (2) Place the alternately laminated three-dimensional woven fabric and ...

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 three-dimensional fabric laminated needled composite material and a preparation method thereof. The three-dimensional fabric laminated needled composite material is formed bycompounding a three-dimensional fabric laminated needled prefabricated body and a base material, wherein the three-dimensional fabric laminated needled prefabricated body is a three-dimensional structure material obtained by paving staple fiber felt between three-dimensional fabric layers and then utilizing a needling process. According to the composite material obtained by laminating and needling according to a specific process, the interlayer performance of the composite material is improved, the number of layers laid in the production process is reduced, the production efficiency is improved, the production period is shortened, the production cost is reduced, and the composite material is suitable for large-scale production and application.

Description

technical field [0001] The invention belongs to the field of fiber-reinforced composite materials, and in particular relates to a three-dimensional fabric laminated needle-punched composite material and a preparation method thereof. Background technique [0002] Fiber-reinforced composite materials have high specific strength, large specific modulus, strong designability, good fatigue resistance, excellent corrosion resistance and easy large-area integral molding, which can significantly reduce the weight of structural parts while meeting performance requirements. These advantages It has superior overall performance than traditional steel and aluminum alloy structural materials, and has been widely used in the aerospace field. [0003] As the main structural form of fiber reinforced composites, laminated composites are mainly made of two-dimensional fabrics and then cured. application bottleneck; at the same time, the thickness of two-dimensional fabrics is generally 0.1mm ...

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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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B5/02B32B5/06B32B5/10B32B5/26B32B5/28B32B17/04B32B17/12B32B27/04B32B27/38B32B7/09B32B33/00B32B38/00B32B38/18
CPCB32B5/02B32B5/06B32B5/10B32B5/26B32B7/08B32B33/00B32B38/00B32B38/1858B32B2038/008B32B2260/023B32B2260/046B32B2262/101B32B2262/106B32B2307/50
Inventor 宋磊磊祝颖丹郭启涛吕东喜
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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