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Fiber fabric with high buckling resistance and method for preparing fiber composite material part with high buckling resistance

A technology of fiber composite materials and fiber fabrics, which is applied in the field of fiber composite materials, can solve the problems that the buckling resistance has not been optimized to the maximum, the fiber bearing capacity has not been fully utilized, and buckling damage has achieved strong designability and is beneficial to Mass production, the effect of improving buckling resistance

Active Publication Date: 2012-07-11
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

[0003] Traditional fiber composite parts are prepared by fiber fabrics formed by laying parallel and straight fibers, and in order to simplify the workload of design and construction, engineering often uses 0°, ±45°, and 90° ply directions, the fiber composite product is prone to buckling failure when subjected to in-plane compression and shearing
Through reasonable layup design, the traditional fiber composite parts with parallel and straight fiber tracks have certain buckling resistance, but the fiber load-bearing capacity of the fiber composite parts has not been fully exerted, and the buckling resistance has not yet been fully realized. get the most optimized

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 fabric with high buckling resistance and method for preparing fiber composite material part with high buckling resistance
  • Fiber fabric with high buckling resistance and method for preparing fiber composite material part with high buckling resistance
  • Fiber fabric with high buckling resistance and method for preparing fiber composite material part with high buckling resistance

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Experimental program
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Effect test

Embodiment 1

[0044]In this implementation, the shape, size and raw materials of the carbon fiber / epoxy resin composite laminate are exactly the same as those of Comparative Example 1. The difference is that in the carbon fiber / epoxy resin composite laminate, the carbon fiber fabric formed by the carbon fiber prepreg tape under the action of the adhesive has a certain shape of the fiber track, which is composed of a series of fiber tracks along a certain direction (y Axes) translation of the sinusoidal curve, its function equation expression is:

[0045] the y n =asinbx+K n (1)

[0046] Where a and b are both positive real numbers, n is a positive integer, and K n is a positive real number and K n ≠ K n+1 .

[0047] The preparation method of the above-mentioned carbon fiber / epoxy resin composite laminate is as follows:

[0048] Step 1: According to the shape and size of the rectangular carbon fiber / epoxy resin composite laminate with a size of 400mm×200mm, design a rec...

Embodiment 2

[0083] In this implementation, the shape and size of the carbon fiber / epoxy resin composite laminate is exactly the same as that of Comparative Example 2. The difference is that in the carbon fiber / epoxy resin composite laminate, the carbon fiber fabric formed by the carbon fiber prepreg tape under the action of the adhesive has a certain shape of the fiber track, which is composed of a series of fibers along a certain direction (y axis) translation obtained cosine curve, its function equation expression is:

[0084] the y n =acosbx+K n (1)

[0085] Where a and b are both positive real numbers, n is a positive integer, and K n is a positive real number and K n ≠ K n+1 .

[0086] The preparation method of the above-mentioned carbon fiber / epoxy resin composite laminate is as follows:

[0087] Step 1: prepare pre-impregnated epoxy resin, the pre-impregnated epoxy resin formula is: (1) resin: epoxy resin E-20 and epoxy resin E-54 mass ratio is 1: 1; (2) curing a...

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 fabric with high buckling resistance. The fiber track of the fiber fabric is a sine curve or a cosine curve which is obtained by offsetting the fiber fabric along a certain direction (y axle), and a functional equation of the fiber track is shown as yn=asibx+Kn or yn=acosbx+Kn, wherein the a and the b are positive real numbers, the n is a positive integer, and the Kn is a positive real number and is not equal to Kn+1. Compared with a fiber fabric with a parallel and smooth fiber track in the prior art, the fiber fabric has the advantages of parameterized fiber directions, high designability, capability of obviously improving the buckling resistance, suitability for mass production and the like; and a fiber composite material part prepared by the fiber fabric has high buckling resistance and a simple preparation method, and fiber materials are not wasted nearly, so that the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of fiber composite materials, in particular to a fiber fabric with high buckling resistance and a method for preparing fiber composite parts with high buckling resistance. Background technique [0002] As a structural, functional or structural / functional integrated material, high-performance fiber composite materials play an irreplaceable role in aerospace, transportation, new energy, marine engineering, construction and other high-end and civilian fields. A large number of fiber composite laminates are used in modern aeronautical structures, such as the grille in the upper frame of the fuselage, the skin between the longitudinal member and the frame, the rib web on the wing surface, and the skin between the girder and the rib. Skins can be handled as fiber composite flat sheets. When it is subjected to compression and shearing, it may buckle or even cause damage. In order to ensure the safety of the struct...

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): B32B5/08B32B5/26D04H1/44C08L63/00C08K7/06
Inventor 秦永利祝颖丹李晓拓张希平王志坚徐腾辉范欣愉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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