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Method for repairing fiber-reinforced resin-based composite material

A fiber-reinforced resin and composite material technology, applied in the field of sustainable application of advanced composite materials, can solve the problems of high heating temperature, poor compactness of the repair layer, complicated operation process, etc., and achieve high degree of bonding, good compactness, and simple operation Effect

Active Publication Date: 2021-06-22
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few researches on the repair of fiber-reinforced resin-based composite materials in China. The existing repair methods have problems such as complex process, poor compactness of the repair layer, uneven surface after repair, weak repair parts, and low safety of repair work.
Invention application (CN111844818A) discloses a repair method and pressurized repair device for resin-based fiber reinforced composite material damage. Before repair, heating blankets and vacuum bags need to be laid on the damaged area. The operation process is complicated and the efficiency is low. Due to the influence of bag shape and laying method, it is difficult to repair complex curved surface structures, and the repair surface is uneven.
During the repair process, the heating temperature is high and the energy consumption is high. The repair area will generate large thermal stress and reduce the mechanical properties of the repair part.

Method used

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  • Method for repairing fiber-reinforced resin-based composite material
  • Method for repairing fiber-reinforced resin-based composite material
  • Method for repairing fiber-reinforced resin-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example provides a fiber-reinforced resin-based composite material repair method for the type of cracking and damage to the PEEK resin matrix during the use of carbon fiber-reinforced PEEK composite materials, such as figure 1 As shown, it specifically includes the following steps:

[0034] Step 1. Use an ultrasonic detection device to detect the carbon fiber reinforced PEEK composite material 4, determine the type and distribution of the damaged area, and mark the damaged area; prepare PEEK powder with a particle size of 20 μm according to the damage type of the PEEK resin matrix cracking 1 Body 2.

[0035] Step 2: Use a high-pressure air gun to clean the cracked 1 area of ​​the PEEK resin matrix to remove debris and dust in the cracked 1 area of ​​the PEEK resin matrix.

[0036]Step 3: Spray a small amount of quartz sand on the crack 1 area of ​​the PEEK resin matrix to enhance the bonding strength of the interface between the PEEK powder 2 and the carbon fiber ...

Embodiment 2

[0040] This example provides a fiber-reinforced resin-based composite material repair method for the type of notch damage in the use of carbon fiber-reinforced PEEK composite materials, such as figure 2 As shown, it specifically includes the following steps:

[0041] Step 1. Use an ultrasonic detection device to detect the carbon fiber reinforced PEEK composite material 8, determine the type and distribution of the damaged area, and mark the damaged area; for the damage type of the gap 5, prepare a fiber reinforced resin-based composite material powder; The preparation method of the reinforced resin-based composite material powder is as follows: carbon fiber, PEEK, and ethyl silicate are mixed and granulated, and then finely pulverized to form a carbon fiber-reinforced PEEK composite material powder 6 with a particle size of 25 μm.

[0042] Among them, other preparation methods of fiber-reinforced resin-based composite material powder can be selected according to repair requi...

Embodiment 3

[0048] This embodiment provides a method for repairing fiber-reinforced resin-based composite materials for the type of carbon fiber fracture damage during the use of carbon fiber-reinforced PEEK composite materials, which specifically includes the following steps:

[0049] Step 1. Use an ultrasonic testing device to detect the carbon fiber reinforced PEEK composite material, determine the type and distribution of the damaged area, and mark the damaged area; prepare carbon fiber powder with a particle size of 25 μm according to the type of carbon fiber fracture damage.

[0050] Step 2: Use a high-pressure air gun to clean the carbon fiber fracture area to remove debris and dust in the carbon fiber fracture area.

[0051] Step 3: Spray a small amount of quartz sand in the carbon fiber fracture damage area to enhance the bonding strength of the interface between the carbon fiber powder and the carbon fiber reinforced PEEK composite material.

[0052] Step 4. When the gas tempera...

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Abstract

The invention discloses a method for repairing a fiber-reinforced resin-based composite material. The method comprises the following steps of: 1, preparing corresponding powder according to damage and defect types of the fiber-reinforced resin-based composite material; 2, cleaning and removing dust, chippings, dirt and other impurities in damage and defect areas of the fiber-reinforced resin-based composite material; 3, carrying out texturing treatment on the damage and defect areas of the fiber-reinforced resin-based composite material; and 4, spraying the prepared powder to the damage and defect areas through a supersonic cold spraying technology, depositing the powder to form a surface repairing layer, and completing repairing of the damage and defect areas. The method has the advantages of high efficiency, low energy consumption, environmental friendliness and the like, the surface of a repaired part is smooth, and the mechanical property is restored to a certain extent.

Description

technical field [0001] The invention belongs to the field of sustainable application of advanced composite materials, and relates to a method for repairing composite materials, in particular to a method for repairing fiber-reinforced resin-based composite materials. Background technique [0002] Because of its high specific strength, specific modulus, and good fatigue resistance, fiber-reinforced resin-based composites are widely used in various cutting-edge fields such as aerospace, automobile industry, and energy. Fiber-reinforced resin-based composites are a complex multiphase system, and the production process is greatly affected by process parameters, which are prone to defects such as voids, weak interfacial bonding, and delamination. In the process of use and maintenance, it may suffer from various structural damages such as tool drop, runway gravel, hail, bird strikes, etc., and it is easy to cause matrix cracks, gaps, holes, fiber breakage and other damage types. T...

Claims

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Application Information

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IPC IPC(8): B29C73/00B29C73/26
CPCB29C73/00B29C73/26
Inventor 成焕波郭立军钱正春冯勇苏松飞
Owner NANJING INST OF TECH
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