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Repair method for delamination damage of composite laminated plate

A composite material layer and composite material technology, which is applied in the field of repairing delamination damage of composite material laminates, can solve the problems of low reliability, complex process, influence on the aerodynamic surface of the structure, etc. Effect

Inactive Publication Date: 2016-01-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two methods are relatively complex, have low reliability, and may affect the aerodynamic surface of the structure

Method used

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  • Repair method for delamination damage of composite laminated plate
  • Repair method for delamination damage of composite laminated plate
  • Repair method for delamination damage of composite laminated plate

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0025] A method for repairing delamination damage of a composite material laminate, the composite material may be a solid composite material or a thermoplastic composite material, and the repair steps are as follows:

[0026] First, use non-destructive testing tools such as ultrasonic scanners to measure the delamination damage position 2 and its range inside the composite laminate 1, as shown in figure 1 and figure 2 shown. Wherein, the delamination damage location 2 may be one or more in the thickness direction of the composite laminate 1 , and the ranges of the multiple delamination damages may be the same or different.

[0027] Secondly, a number of small holes 3 with a diameter of 0.1-1 mm are processed at the delamination damage position 2 of the composite material laminate 1 and its surroundings. The small holes 3 can be distributed paral...

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Abstract

The invention relates to a repair method for delamination damage of a composite laminated plate, and belongs to the field of laminated plate repair. The repair method includes the steps that firstly, a plurality of small holes are machined in the delamination damage area of the composite laminated plate and the portion around the delamination damage area; secondly, making threads dipped with adhesives sequentially penetrate the small holes to be tightly pulled; and thirdly, the adhesives are solidified so that the threads and composites around the threads can be bonded into a whole. According to the repair method, the diameter of the machined small holes is small, less fiber is cut off, the influences on the performance in the face of the composite laminated plate are low, the lamination prevention capacity of the laminated plate can be greatly improved through the threads and bonding with the surrounding composites, the purpose of enhancing delamination damage of the composite laminated plate is effectively achieved, the repair result of the composite laminated plate can be improved, and wider application of the composites is promoted.

Description

technical field [0001] The invention relates to the field of repairing laminated boards, in particular to a method for repairing delamination damage of composite material laminated boards. Background technique [0002] Resin-based fiber reinforced composite laminates have the advantages of high specific strength, high specific modulus, anisotropy, fatigue resistance, high temperature resistance, corrosion resistance and performance design, and have been widely used in engineering fields. Composite laminates rely on resin bonding between different single layers, and the interlayer strength and toughness are low, especially the impact resistance is poor. During use and maintenance, impacts such as tool drop, runway gravel, hail, and bird strikes may be encountered, causing delamination damage in the impacted area, and further reducing the stiffness and strength of the composite laminate. [0003] In order to solve the problem that composite material laminates are sensitive to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/02B29C73/24B29C73/26
Inventor 刘龙权
Owner SHANGHAI JIAO TONG UNIV
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