Warp-knitted cloth with three axial carbon fiber yarn layers

Abstract

The invention relates to warp-knitted cloth with three axial carbon fiber yarn layers, belonging to the field of carbon fiber composite materials. The warp-knitted cloth consists of three layers of parallel and straightened carbon fiber rovings which are warp-knitted together by warp knitting yarns, wherein the upper layer of parallel and straightened carbon fiber rovings is evenly arranged in the direction of an 0-degree angle, the lower layer of parallel and straightened carbon fiber rovings is evenly arranged in the direction of a -45-degree angle, the middle layer of parallel and straightened carbon fiber rovings is evenly arranged in the direction of a +45-degree angle, the model of carbon fiber rovings is 3K-50K, the mass per unit area of the parallel and straightened carbon fiber rovings evenly arranged in the direction of an 0-degree angle is larger than or equal to 150g / m<2> and less than or equal to 1000g / m<2>, the mass per unit area of the parallel and straightened carbon fiber rovings evenly arranged in the directions of + / -45-degree angles is larger than or equal to 75g / m<2> and less than or equal to 400g / m<2>, the laying density of the warp knitting yarns is 5 pieces per inch, and the mass per unit area of the laid warp knitting yarns is larger than or equal to 5g / m<2> and less than or equal to 12g / m<2>.

Description

technical field [0001] The invention relates to the field of carbon fiber knitted composite materials, specifically a triaxial carbon fiber warp knitted fabric. Background technique [0002] As we all know, at present, the application of carbon fiber in many aspects such as aerospace, military industry, sports equipment, etc., mostly appears in the structure of unidirectional carbon fiber or carbon fiber woven fabric. Due to the anisotropy of the structure, the composite materials made of unidirectional carbon fibers make the tensile properties along the fiber direction much higher than the tensile properties perpendicular to the fiber direction, and the application range is limited. In addition, the thickness of unidirectional carbon fiber composite material is small, and the operation is complicated in the production of large and thick parts. [0003] The warp and weft yarns in the traditional carbon fiber woven structure are in a bending state. When the load is applied, ...

AI Technical Summary

Problems solved by technology

Composite materials made of unidirectional carbon fibers, due to the anisotropy of their structure, make the tensile properties along the fiber direction much higher than the tensile properties perpendicular to the fiber direction, and the application range is limited

In addition, the thickness of unidirectional carbon fiber composite material is small, and the operation is complicated in the production of large thick parts.

[0003] The warp and weft yarns in the traditional carbon fiber woven structure are in a bending state. When the load is applied, the warp and weft yarns bend first and then straighten. The product has large deformation, low strength, low elastic modulus, poor shear performance, and poor interlayer performance. When the tearing force is applied, the single yarn is continuously stressed, the tear resistance is poor, and the fiber performance in the carbon fiber woven fabric cannot be fully exerted

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