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Method for preparing longitudinally reinforced composite preform, and composite

A composite material and prefabricated technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve problems such as poor longitudinal mechanical properties, and achieve the effect of improving mechanical properties and increasing longitudinal mechanical properties.

Active Publication Date: 2015-04-15
BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a method for preparing longitudinally reinforced composite material preforms and composite materials to solve the technical problem of poor longitudinal mechanical properties of composite material preforms in the prior art

Method used

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  • Method for preparing longitudinally reinforced composite preform, and composite
  • Method for preparing longitudinally reinforced composite preform, and composite
  • Method for preparing longitudinally reinforced composite preform, and composite

Examples

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preparation example Construction

[0036] According to a typical embodiment of the present invention, a method for preparing a composite material preform is provided. The preparation method includes the following steps: a plurality of guide sleeves 10 are fixed in parallel on the guide template to form a predetermined shape; according to the cross-sectional area of ​​the guide sleeves 10, the arrangement density of the guide sleeves, the selection of fiber bundles, and the predetermined winding path of the fibers, the fibers are determined. The position of the gap; the corresponding fiber will form the position of the gap on the guide template to set the filling sleeve 30 parallel to the guide sleeve 10; the fiber 20 is wound between a plurality of guide sleeves 10 and the filling sleeve 30; Ten fibers 20 are compacted to obtain a composite material preform. Since the filling sleeves parallel to the guide sleeves are also arranged in the gaps of the fibers, the longitudinal mechanical properties of the composit...

Embodiment

[0043] A weaving method for a hexahedron preform with a size of 100mm×100mm×50mm is listed.

[0044] 1) Select a guide sleeve 10 with a diameter of 10mm, a height of 50mm, and a carbon rod as the material, select 6k carbon fiber, and measure the cross-sectional area of ​​the 6k fiber 20 to be 2mm; select the optimal one according to the structural shape and performance requirements of the prefabricated part The laying path, in the present embodiment, the laying path of 60°, 120°, and 180° is selected; then layered modeling is carried out along the Z direction to obtain a three-dimensional CAD model of the prefabricated part as a whole;

[0045] 2) According to the size of the guide sleeves 10, arrange 10×10 guide sleeves 10 at equal intervals on the digital guide template. Tangent; the guide sleeve 10 and the filling sleeve 30 are arranged on the guide sleeve 10 template of the geometric array layout according to the CAD model information; supported by the guide sleeve 10 and ...

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Abstract

The invention discloses a method for preparing a longitudinally reinforced composite preform, and a composite. The composite preform comprises a plurality of guide sleeves and fibers wound among a plurality of guide sleeves, wherein a plurality of guide sleeves are arranged according to a predetermined path to form a predetermined shape; and filling sleeves are arranged among gaps formed by a fiber laying path. Through the technical scheme, the filling sleeves parallel to the guide sleeves are arranged among the gaps of the fibers, so that the longitudinal mechanical property of the composite preform is greatly improved; and the filling sleeves are parallel to the guide sleeves, so that the composite preform can be processed by the original mechanical equipment, and the mechanical property of the composite preform is greatly improved on the basis of not increasing production cost.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a method for preparing a longitudinally reinforced composite material preform and a composite material. Background technique [0002] Three-dimensional woven prefabrication is a composite material with integral fabric as reinforcement, which is a new type of composite material weaving forming technology developed in the 1980s. Using this technology can directly weave whole shaped prefabricated parts of various shapes and sizes. The three-dimensional woven composite parts made of these prefabricated parts do not need to be processed again, which avoids the damage of fibers caused by processing. Moreover, the three-dimensional woven composite material prepared by this method has unique advantages such as high strength, difficult expansion of matrix damage, high impact resistance and comprehensive mechanical properties, as well as ablation resistance, high te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/05B29C70/02
Inventor 单忠德陈思思刘丰
Owner BEIJING NAT INNOVATION INST OF LIGHTWEIGHT LTD
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