Solidified composite and enhancing method of repairing structure and connecting structure of solidified composite

A composite material and connecting structure technology, applied in chemical instruments and methods, lamination devices, lamination, etc., can solve problems such as inability to apply, and achieve enhanced out-of-plane strength and toughness, improved mechanical properties, and enhanced anti-delamination capabilities. and anti-cracking effect

Inactive Publication Date: 2015-12-23
刘龙权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiency that various Z-direction reinforcement technologies cannot be applied to cured composite laminates and their repair structures and connection structures, and provide a repair structure for cured composite laminates and their patches. The method of strengthening the connection structure makes the composite material and its repair structure and connection structure have higher load-bearing capacity

Method used

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  • Solidified composite and enhancing method of repairing structure and connecting structure of solidified composite
  • Solidified composite and enhancing method of repairing structure and connecting structure of solidified composite
  • Solidified composite and enhancing method of repairing structure and connecting structure of solidified composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Application of the proposed method to reinforce 2 mm thick composite laminates with delamination damage, such as figure 1 or 2, the steps are as follows:

[0043](1) The position and degree of delamination damage of the cured composite laminate (11 or 21) are measured by the ultrasonic C-scan method, and the reinforcement range is determined, such as figure 1 shown;

[0044] (2) According to the damage situation, it is determined to use a titanium alloy rod impregnated with the room temperature curing adhesive SY-23B, which has a diameter of 1 mm and a length of 2 mm. The arrangement is as follows figure 1 shown;

[0045] (3) Apply a micro-diamond drill to process a number of small holes with a diameter of 1.2 mm in and around the layered part;

[0046] (4) Insert the thin titanium alloy rod (12 or 22) soaked in adhesive into the processed small hole, such as figure 1 or 2;

[0047] (5) According to the curing requirements of the adhesive SY-23B used, the adhesive ...

Embodiment 2

[0050] Larger delamination or fiber fracture damage inside the composite material can be repaired by patching (the thickness of the composite laminate is 2 mm, and the thickness of the patch is 1 mm), such as image 3 and 4 shown. image 3 The method shown is to apply a composite patch directly on the outer surface of the damaged area. Figure 4 The method shown is that after the material in the damaged area is excavated, a patch of composite material is pasted on the outer surface. Applying the proposed method, the steps to enhance the above two subsidized repair structures are as follows:

[0051] (1) Determine the reinforcement position as the patch repair site;

[0052] (2) According to the shape and size of the external patch (32 or 42) and its damage repair plan for the composite laminate (31 or 41), determine the use of carbon fiber rods impregnated with high-temperature curing adhesive J-116, with a diameter of 0.5 mm, The length is 3 mm (the length of the thin rod...

Embodiment 3

[0058] The proposed method was applied to reinforce the composite excavation repair structure with a thickness of 4 mm, such as Figure 5 As shown, the enhancement steps are as follows:

[0059] (1) Determine the enhanced position as the embedded patch site;

[0060] (2) According to the shape and size of the external patch (52) and its damage repair plan for the composite laminate (51), determine the use of carbon fiber rods impregnated with high-temperature curing adhesive J-116, with a diameter of 1.5 mm and a length of 4 mm , the arrangement is as Figure 5 shown;

[0061] (3) According to the enhanced process parameters, a number of small holes with a diameter of 1.8 mm are processed with a TruMicro5050 laser in the area of ​​the patch (52), and the small holes penetrate the patch and the composite laminate overlapping the patch;

[0062] (4) Insert the thin stick (54) soaked in adhesive into the processed small hole;

[0063] (5) According to the curing requirements ...

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Abstract

The invention discloses a solidified composite and an enhancing method of a repairing structure and a connecting structure of the solidified composite, and belongs to the composite enhancing method. The method specifically includes the steps of manufacturing a certain number of small holes in a damaged part of a solidified composite laminated board, a repaired part of a repairing piece and a connecting part of the laminated board and the repairing piece, embedding thin bars soaked with adhesives in the small holes, and solidifying the adhesives to make the thin bars adhere to surrounding materials. By means of the method, the machined small holes are small in diameter, little fiber is cut off, and the performance in the surface of the composite laminated board is little influenced; through the adhesion between the thin bars and the surrounding materials, the interlayer strength and toughness of the composite laminated board can be greatly improved, the problem that in the prior art, the specific part and structure of the solidified composite laminated board can not be enhanced is effectively solved, the mechanical performance of the structure of the composite and the mechanical performance of the repairing structure and the connecting structure of the composite are improved, the bearing efficiency of the structure of the composite is improved, and the composite is promoted to be more widely applied.

Description

technical field [0001] The invention relates to a cured composite material and a method for strengthening its repair structure and connection structure, in particular to processing a number of small holes in and around the part of the composite material laminate that needs to be strengthened after curing, and embedding an adhesive impregnated into the holes. Thin rods, cured adhesives bond the thin rods with the surrounding materials to achieve interlayer reinforcement and toughening of laminated composites, as well as the improvement of the repair effect of composite materials and the improvement of the load-carrying capacity of composite material connection structures. . Background technique [0002] Compared with traditional metal materials, resin-based fiber-reinforced composite materials have high specific strength, high specific modulus, anisotropy, fatigue resistance, high temperature resistance, corrosion resistance, good damping and shock absorption, performance can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B5/02B32B3/24
CPCB32B37/12B32B3/266B32B5/02
Inventor 不公告发明人
Owner 刘龙权
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