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Fiber grating intelligent composite material structure based on 3D printing and preparation method thereof

A composite material, 3D printing technology, applied in the direction of fiber mechanical structure, grating fiber, cladding fiber, etc., can solve the problems of difficult adaptation and real-time monitoring of composite material structural parts, achieve simple manufacturing process, realize real-time health monitoring, The effect of easy layout process

Active Publication Date: 2016-04-06
绍兴市上虞区武汉理工大学高等研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, fiber Bragg gratings have been used for health monitoring of composite material structures, but they are mainly limited to laminated composite boards. It is very good to embed fiber optic grating sensors in the lamination process of laminated composite boards. The health monitoring of composite material plates has been realized, but it is difficult to adapt to the composite material structural parts with complex spatial structure, so it is impossible to monitor the health of composite material structural parts with complex spatial structure through fiber grating

Method used

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  • Fiber grating intelligent composite material structure based on 3D printing and preparation method thereof
  • Fiber grating intelligent composite material structure based on 3D printing and preparation method thereof
  • Fiber grating intelligent composite material structure based on 3D printing and preparation method thereof

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Effect test

Embodiment 1

[0031] A 3D printing based fiber grating smart composite structure, such as figure 1 and figure 2 As shown, it includes a composite material matrix 5 and an optical fiber 1 located in the composite material matrix 5, the optical fiber 1 includes a grating and a signal transmission pigtail, and the signal transmission pigtail is drawn from the composite material matrix 5; the composite material matrix 5 is printed by 3D A part is produced by adding the optical fiber 1 and then continuing to 3D print the rest.

[0032] In this embodiment, the grating includes a strain measurement grating 2 and a temperature measurement grating 4, wherein the strain measurement grating 2 is integrally fixed after applying a pretightening force, and the two ends of the temperature measurement grating 4 are connected to the interior of the composite material matrix 5 in a relaxed state. Fixed, its fixing method is the adhesive 3 connection.

[0033] Preferably, the signal transmission pigtail is...

Embodiment 2

[0048] The structure and method of this embodiment are basically the same as those of Embodiment 1, the difference in structure is that the signal transmission pigtail 6 is covered with a fiber protection sleeve 7, and the fiber protection sleeve 7 and the strain measurement grating 2 are integrated , and both ends of the temperature measuring grating 4 are respectively fixed by fused deposition 3D printing of composite materials.

[0049] The method is different in that: the fiber protection sleeve 7 , the entirety of the strain measurement grating 2 , and both ends of the temperature measurement grating 4 are directly fixed by the composite material fused and deposited during the 3D printing process.

Embodiment 3

[0051]The structure and method of this embodiment are basically the same as those of Embodiment 1. The difference is that the structure of the composite material matrix itself is relatively complex, and the grating is a plurality of distributed gratings. Determined in places affected by high temperatures.

[0052] The traditional laminated composite material smart board embeds the fiber grating into the interlayer, fixes the fiber grating with an adhesive, and reinforces the composite material board through a lamination process. This method cannot ensure the installation position of the fiber grating. It is more free to control, and it is difficult to realize the intelligence of composite material parts with complex spatial structures. Using 3D printing technology, fiber gratings can be embedded in any position that needs to be detected in composite parts with complex spatial structures, so as to realize the health monitoring of complex structural parts of composite materials....

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Abstract

The invention provides a fiber grating intelligent composite material structure based on 3D printing, and the intelligent composite material structure comprises a composite material matrix and a fiber inside the composite material matrix; the fiber comprises a grating and a signal transmission tail fiber; the signal transmission tail fiber is lead out from the composite material matrix; part of the composite material matrix is printed through 3D printing and the rest of the composite material matrix is printed after adding the fiber through 3D printing. The composite material structure is printed through 3D printing; the intelligent healthy monitoring of the composite material structure that has a complex structure is realized by embedding the fiber grating in the material printing process; the installation position and the installation state of the fiber grating can be controlled because the 3D printing process can be interrupted at any time; the temperature and strain at any position of a composite material member can be monitored, and therefore the healthy real time monitoring of the composite material structure that has a complex structure is realized.

Description

technical field [0001] The invention relates to the technical fields of optical fiber sensing and 3D printing, in particular to a 3D printing-based fiber grating intelligent composite material structure and a preparation method thereof. Background technique [0002] Composite materials are widely used in high-tech fields such as aerospace, ships, automobiles and wind power generation, such as F-22 fighter wings, Visby-class corvette hulls and wind turbine blades. During the long-term work of these composite structures, due to unfavorable factors such as fatigue, corrosion, and material aging, damage accumulation will inevitably occur, and even cause serious safety accidents and economic losses. Therefore, it is very important to monitor the health of composite structures. [0003] Fiber Bragg Grating is an optical sensing element sensitive to temperature and strain. It has the advantages of small size, light weight, high precision, corrosion resistance, explosion-proof, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B6/44
CPCG02B6/02057G02B6/44
Inventor 谭跃刚李瑞亚周祖德陈宜炀马国锋方亮严才根
Owner 绍兴市上虞区武汉理工大学高等研究院
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