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Fiber fabric with open pore structure and manufacturing method for fiber composite material part with open pore structure

A fiber composite material and open-pore structure technology, applied in non-woven fabrics, textiles and papermaking, can solve the problems of stress concentration and reduce the strength of fiber composite material parts, reduce stress concentration, facilitate mass production, cost reduction effect

Active Publication Date: 2014-06-11
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

[0013] This form of fiber trajectory is prone to stress concentration at the junction of the near-hole part and the far-hole part due to the large angle change of the fiber direction, which greatly reduces the strength of the fiber composite part.

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 open pore structure and manufacturing method for fiber composite material part with open pore structure
  • Fiber fabric with open pore structure and manufacturing method for fiber composite material part with open pore structure
  • Fiber fabric with open pore structure and manufacturing method for fiber composite material part with open pore structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] In this implementation, the raw materials and the hole structure of the carbon fiber / epoxy resin composite laminate with the open structure are exactly the same as those of Comparative Example 1. The difference is that in the carbon fiber / epoxy resin composite laminate with an open structure, the carbon fiber fabric with an open structure formed by the carbon fiber prepreg tape under the action of the adhesive has a certain shape of fiber tracks. The trajectory is represented by the following elliptic curve family equation (1):

[0072] x 2 ( r + vt ) 2 + y 2 ( r + t ) 2 = 1 ...

Embodiment 2

[0084] In this implementation, the raw materials and the hole structure of the carbon fiber / epoxy resin composite laminate with the open structure are exactly the same as those of Comparative Example 1. The difference is that in the carbon fiber / epoxy resin composite laminate with an open structure, the carbon fiber fabric with an open structure formed by fixing the dry carbon fiber with a suture has a fiber track of a certain shape, which is composed of the following The elliptic curve family equation (3) expresses:

[0085] x 2 ( r + vt ) 2 + y 2 ( r + t ) 2 = 1 - ...

Embodiment 3

[0096] In this implementation, the raw material and opening structure of the carbon fiber / unsaturated polyester resin composite laminate with an open structure are exactly the same as those in Comparative Example 2. The difference is that in the carbon fiber / unsaturated polyester resin composite laminate with an open structure, the carbon fiber fabric with an open structure formed by fixing the dry carbon fiber with a suture has a fiber track of a certain shape. The elliptic curve after the overall rotation of 15° by the above elliptic curve family equation (4).

[0097] Figure 5 It is a schematic diagram of laying the elliptical curve family fiber track of the carbon fiber fabric. The dotted lines in the figure are the major axis and the minor axis of the ellipse trajectory, respectively, and the solid lines are some fiber trajectories in the carbon fiber fabric.

[0098] The preparation method of the above-mentioned open-pore structure carbon fiber / unsaturated polyester r...

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 fiber fabric with an open pore structure and a manufacturing method for a fiber composite material part with the open pore structure. The fiber track of the fiber fabric belongs to an elliptic curve family, and the lengths of a long axis and a short axis are changed progressively from an open pore part to the edge of the fiber fabric. Compared with the prior art, the fiber fabric has the advantages of fiber continuity, fiber direction parametrization, curvature radius controllability, capability of effectively reducing stress concentration, and applicability to batch production. The fiber composite material part which is made from the fiber fabric and has the open pore structure has the advantages of low cost, strong strength, convenience and easiness for manufacture and little fiber material waste.

Description

technical field [0001] The invention relates to the technical field of fiber composite materials, in particular to a fiber fabric with an open-pore structure and a method for preparing a fiber composite material product with an open-pore structure. Background technique [0002] Due to its high specific strength, high specific stiffness, excellent shock absorption, fatigue resistance, corrosion resistance and other advantages, fiber composite materials have been widely used in aerospace, sporting goods, automobiles, wind power generation and other fields. Due to the requirements of material connection, weight reduction and viewing windows, holes (openings) are often required on fiber composite parts. However, opening holes (openings) on the fiber composite material will inevitably lead to stress concentration at the edge of the hole (mouth), which greatly reduces the mechanical properties of the fiber composite material. [0003] The existing methods for enhancing the openin...

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 Patents(China)
IPC IPC(8): D04H1/74B29C70/30
Inventor 李晓拓祝颖丹秦永利张笑晴徐腾辉颜春范欣愉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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