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Self-induction repairing resin matrix composite structure and preparing repairing method

A composite material and repairing resin technology, which is applied in the field of self-induction repairing resin-based composite material structure and preparation and repair, can solve the problems of multiple additional weight gain and complex system interface, and achieves reduction of system complexity, small decrease in mechanical properties, and structural Simple and reliable effects

Active Publication Date: 2017-05-10
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, various principle schemes proposed use separate damage sensing system and repair agent supply system, the system interface is complicated, and the additional weight is much increased.

Method used

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  • Self-induction repairing resin matrix composite structure and preparing repairing method
  • Self-induction repairing resin matrix composite structure and preparing repairing method
  • Self-induction repairing resin matrix composite structure and preparing repairing method

Examples

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preparation example Construction

[0036] A method for preparing a self-inductively repairing resin-based composite material structure as described above, the method comprising the following steps:

[0037] Step 1. Formation of hollow vessels without heterogeneous walls

[0038] Put the sacrificial wire 2 into the dry fiber fabric or prepreg layup, the resin of the composite material is cured and formed, and then the sacrificial wire is removed by chemical or physical methods and the vascular network between the composite material units is cut off. Each composite material unit of 1 forms a hollow vessel 3 that is sensitive to cracks and has no heterogeneous walls;

[0039] Step 2. Install the restoration agent delivery pipeline

[0040] On the surface of the resin-based composite material 1, a repairing agent delivery pipeline 4 is installed, and the repairing agent delivery pipeline 4 communicates with each composite material unit through a number of connecting pipes, and a check valve 6 is installed in the c...

Embodiment 1

[0048]Embodiment 1 Preparation of glass fiber reinforced resin-based composite material GFRP containing hollow vessels

[0049] Lay the prepreg according to the layup sequence set as follows: the position of the pre-embedded line PSL [0 / 0 / 0 / 0 / PSL / 0 / 0 / 0 / 0], the diameter of the pre-embedded line is 100- 500 μm. Add pre-embedded lines between the set layers, with an interval of 1-20mm between the pre-embedded lines, and then continue to lay the glass fabric reinforced epoxy resin SW280 / 3218 prepreg of the set layer, and use the autoclave process to form composite materials. The autoclave curing process is: vacuumize at room temperature, the vacuum degree is not less than -0.095MPa, heat to 60°C, hold for 0.5h, pressurize 0.3MPa, raise the temperature to 130°C at a heating rate of 1.5°C / min, keep the temperature for 2h, and naturally Cool to below 60°C and leave the tank. The pre-embedded thread was pulled out from the composite material to obtain a GFRP composite material conta...

Embodiment 2

[0050] Example 2 Preparation of GFRP composites containing hollow vessels

[0051] Lay the prepreg according to the layup sequence set as follows: the position of the pre-embedded line PSL [45 / 0 / -45 / 90 / PSL / 45 / 0 / -45 / 90]s, the diameter of the pre-embedded line 100-500μm. Add pre-embedded lines between the set layers, the interval between the pre-embedded lines is 1-20mm, and the two layers of pre-embedded lines are staggered by 2-10mm, and continue to lay the glass fabric reinforced epoxy resin SW280 / 3218 prepreg of the set layer, Composite materials are molded by autoclave process. The autoclave curing process is: vacuumize at room temperature, the vacuum degree is not less than -0.095MPa, heat to 60°C, hold for 0.5h, pressurize 0.3MPa, heat up to 130°C at a heating rate of 1.5°C / min, keep the temperature for 2h, and naturally Cool to below 60°C and leave the tank. The pre-embedded thread was pulled out from the composite material to obtain a GFRP composite material containi...

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Abstract

The invention belongs to the field of intelligent composites and particularly relates to a self-induction repairing resin matrix composite structure and a preparing repairing method. Currently, an impairment awareness sensing system and a repairing agent supply system which are separated are adopted in various principle schemes currently proposed. System connectors are complex, and the additional weight increment is large. The resin matrix composite comprises multiple composite units, hollow vessel pipes which communicate with one another are arranged in each composite unit. The structure further comprises a repairing agent conveying pipeline arranged on the surface of the resin matrix composite, and the repairing agent conveying pipeline is filled with a repairing agent. The repairing agent conveying pipeline communicates with the hollow vessel pipes in all the composite units, and a connecting pipeline is internally provided with a one-way check valve and a flow detection element. Two sets of separated systems which are the impairment awareness sensing system and the repairing agent supply system are not needed, repairing agent supplying and impairment sensing are integrated, the system complexity is greatly lowered, the mechanical performance of a material body is slightly reduced, and the structure is simple and reliable.

Description

technical field [0001] The invention belongs to the field of intelligent composite materials, and in particular relates to a self-induction repairing resin-based composite material structure and a preparation and repairing method. Background technique [0002] In the living system in nature, there are many composite material structures, such as bone and ivory, which are composite materials composed of collagen fibers and hydroxyapatite nanocrystals. They are not only light and high-strength, but also have good environmental adaptability, and can self-sensing and self-repairing for small damages. Studies have shown that if the human tibia has no self-repair ability, its fatigue life will not exceed 3 years. It can be seen that the self-repair function can significantly improve the environmental survival ability of organisms and greatly prolong life. [0003] In contrast, fiber reinforced resin matrix composites (Fiber reinforced polymer composites), which are widely used in ...

Claims

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Application Information

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IPC IPC(8): B29C73/22
CPCB29C73/166B29C73/22
Inventor 李斌太赵大方
Owner AVIC BASIC TECH RES INST
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