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Resin-based composite material curing online monitoring method

A technology for composite materials and composite material components, which is applied in the field of online self-monitoring of resin-based composite materials curing, which can solve problems such as difficulty in accurate online monitoring of curing degree, and achieve the effect of ensuring integrity, good reliability and high precision

Active Publication Date: 2019-05-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an online self-monitoring method for the curing degree of resin-based composite materials in order to solve the problem that the curing degree of resin-based composite materials is difficult to monitor accurately on-line in the process of electric loss heating and curing.

Method used

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  • Resin-based composite material curing online monitoring method

Examples

Experimental program
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Embodiment 1

[0028] In this embodiment, the solidification degree of the composite material component is monitored in real time by the online solidification degree monitoring method of the present invention in the microwave heating process of the composite material. The composite material to be tested is formed by laying up glass bismaleimide resin-based composite material prepreg, and the layup method is [0° / 90°] 10s , a total of 20 layers, the thickness of the single-layer prepreg is 0.25mm; the mold is a glass mold, the projection size of the mold surface is 4500mm×4500mm, and the thickness is 3mm; Gel felt. The concrete steps of this embodiment are as follows:

[0029] Step 1: Arrange the mold temperature sensor: clean the surface of the mold with a cleaning solvent, and attach an optical fiber fluorescent temperature sensor in a dot matrix on the lower surface of the mold to obtain real-time average temperature data of the mold;

[0030]Step 2: Place the material: Lay a release clot...

Embodiment 2

[0037] In this embodiment, the solidification degree of the composite material member is monitored in real time by using the solidification degree online monitoring method of the present invention in the composite material induction heating process. The composite material to be tested is formed by laying up multidirectional carbon bismaleimide resin-based composite material prepreg T700 / QY9611, and the layup method is [0° / 90°] 10s , a total of 20 layers, the thickness of the single-layer prepreg is 0.25mm; the mold is a glass mold, the projection size of the mold surface is 4500mm×4500mm, and the thickness is 3mm; Gel felt. The concrete steps of this embodiment are as follows:

[0038] Step 1: Arrange the mold temperature sensor: clean the surface of the mold with a cleaning solvent, and attach an optical fiber fluorescent temperature sensor in a dot matrix on the lower surface of the mold to obtain real-time mold temperature information;

[0039] Step 2: Lay the material: L...

Embodiment 3

[0046] In this embodiment, the solidification degree of the carbon fiber composite material component is monitored in real time by using the solidification degree online monitoring method of the present invention in the carbon fiber composite material self-resistance electrothermal process. The composite material to be tested is formed by laying up multidirectional carbon bismaleimide resin-based composite material prepreg T700 / QY9611, and the layup method is [0° / 90°] 10s , a total of 20 layers, the thickness of the single-layer prepreg is 0.25mm; the mold is a metal mold, the projection size of the mold surface is 4500mm×4500mm, and the thickness is 3mm; according to the process requirements, apply a pair of sheets on the edge of the material Shaped copper electrodes, the thickness of the electrodes is 0.25mm; the heat insulation barrier is made of aluminum silicate fiber heat insulation felt. The concrete steps of this embodiment are as follows:

[0047] Step 1: Arrange the...

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Abstract

The invention relates to a resin-based composite material curing online monitoring method, belonging to the technical field of composite material curing online monitoring, and particularly relates toa curing degree monitoring method for a composite material electric energy loss heating curing process. For the curing technology of accurately measuring the electric energy transmitted into a composite material member, the electric power value and an average temperature change amount of a whole member are monitored and input on line, according to the law of conservation of energy, the chemical energy released by the composite material member is calculated in real time, and finally the degree of the cross-linking and solidity reaction of the whole member is obtained in real time. The method does not need to embed a curing sensor generating influences on the material performances, the composite material can be taken as a heating source and as a sensor, and the composite material member electric power and temperature change are input to represent the average curing degree of the material. The method can greatly enhance the implementability of on-line monitoring of the curing degree of composite materials, can significantly improve the curing quality of composite members, and can achieve high-efficiency adaptive regulation of the curing process.

Description

technical field [0001] The invention relates to a composite material curing technology, in particular to a method for monitoring the curing degree of the composite material under the electric energy loss heating curing process, in particular to an on-line self-monitoring method for the curing of the resin-based composite material. Background technique [0002] Resin-based composite materials have the advantages of light weight, high specific strength, and high specific stiffness, and have become key materials in the field of aerospace manufacturing. higher. The manufacturing process of composite materials is divided into three steps: laying, curing and processing. Among them, the curing process is the key step that takes the longest time, consumes the most energy, and has the greatest impact on the performance of the final part. During the curing process, the composite material is placed under a high temperature and high pressure system, the resin undergoes a chemical cross...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/48G01R21/06
Inventor 李迎光刘舒霆沈艳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS