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Method for determining preset mode of resin film in RFI process

A technology of preset method and determination method, which is applied in the low-cost field of high-performance resin-based composite materials to achieve the effect of improving penetration efficiency, meeting quality requirements and shortening penetration distance.

Active Publication Date: 2021-03-09
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a method for determining the resin film preset mode of the RFI process, by classifying the resin film preset modes of the RFI process, and analyzing the structural characteristics and resin properties of the fiber preform of the product formed by the RFI process. According to the applicability of the film specifications, the appropriate resin film preset method is selected according to the structural characteristics of the fiber preform and the surface density of the resin film, and the problem of how to improve the quality reliability and molding efficiency of the resin infiltration molding of the complex structure fiber preform is solved. question

Method used

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  • Method for determining preset mode of resin film in RFI process
  • Method for determining preset mode of resin film in RFI process
  • Method for determining preset mode of resin film in RFI process

Examples

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Embodiment 1

[0106] A panel structure with six T-shaped ribs, the flange of the T-shaped ribs 6 is stitched to the skin 7, formed by the RFI process, and the fiber preform adopts an area density of 160g / m 2 The fiber fabric 3 is laid up, the number of layers of the skin 7 is twenty-five layers, the number of layers of the fiber fabric 3 of the T-shaped rib 6 is sixteen layers, and the fiber density is 1.76g / cm 3 , resin density 1.24g / cm 3 , the fiber volume content requirement is 57%, the tolerance is ±3%, and the surface density is 620g / m 2 A resin film of one specification. The selection method of the resin film preset method is as follows:

[0107] (a) Classification of RFI process resin film preset methods and factors to be considered in choosing a preset method

[0108] There are two commonly used resin film preset methods in the RFI process: the interlayer preset method and the centralized preset method. Firstly, the specific structural characteristics of the fiber preform are an...

Embodiment 2

[0132] The wall panel structure with four hat-shaped ribs, the periphery of the skin and the 8 flanges of the hat-shaped ribs are stitched with the skin 7, formed by the RFI process, and the fiber preform adopts an area density of 190g / m 2 The fiber fabric 3 is laid up, the number of layers of the fiber fabric 3 of the skin is twenty layers, the number of layers of the fiber fabric 3 of the cap rib 8 is twelve layers, and the fiber density is 1.8g / cm 3 , resin density 1.24g / cm 3 , the fiber volume content requirement is 58%, the tolerance is ±3%, and the surface density is 620g / m 2 and 105g / m 2 Two specifications of resin film. The selection method of the resin film preset method is as follows:

[0133] (a) Classification of RFI process resin film preset methods and factors to be considered in choosing a preset method

[0134] There are two resin film preset methods in the RFI process: the interlayer preset method and the centralized preset method. Firstly, the specific s...

Embodiment 3

[0172] Combination structure composed of glass fiber fabric and three-dimensional weaving body, the thickness direction consists of fifty-six layers of glass fiber fabric 3 and surface density 35kg / m 2 The three-dimensional weaving body is combined, and it is formed by RFI process. The three-dimensional density of the fiber fabric is 100g / m 2 , fiber density 2.2g / cm 3 , resin density 1.24g / cm 3 , the fiber volume content requirement is 56.5%, the tolerance is ±2%, and the surface density is 125g / m 2 and 1240g / m 2 Two specifications of resin film. The selection method of the resin film preset method is as follows:

[0173] (a) Classification of RFI process resin film preset methods and factors to be considered in choosing a preset method

[0174] For the selection of the two resin film preset methods of the interlayer preset method and the centralized preset method in the RFI process, it is necessary to consider the specific structural characteristics of the fiber preform ...

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Abstract

The invention relates to a method for determining a preset mode of a resin film in a RFI process. The method comprises the following steps of classifying the preset mode of the resin film in the RFI process and determining consideration factors of the preset mode of the resin film in the RFI process; analyzing the structural characteristics of a fiber preform of a part formed by the RFI process; and determining a preset mode of a target resin film according to the structural characteristics of the fiber preform and the surface density of the resin film. The method for determining the preset mode of the resin film in the RFI process aims to solve the problem of how to improve the quality reliability and the forming efficiency of resin permeation forming of the fiber preform with a complex structure.

Description

technical field [0001] The invention relates to the low-cost technical field of high-performance resin-based composite materials, in particular to a method for determining a preset mode of a resin film in an RFI process. Background technique [0002] Resin Film Infusion (Resin Film Infusion for short RFI) is a liquid forming technology that can combine stitching, weaving, etc. to three-dimensionally reinforce the traditional laminate structure. The formed composite material has good structural integrity, strong impact resistance, and has It is suitable for the advantages of integral forming of large-scale wall panel components, so it has been more and more used in recent years. The remarkable feature of the RFI process is that the dry fiber is used to prepare the preform. The resin film is combined with the dry fiber preform in a preset way. Infiltration, heating and curing to obtain composite parts. The preset method of the resin film in the RFI process is an important li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/68
CPCB29C70/681B29C70/68
Inventor 高艳秋赵龙
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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