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Self-diagnosing system for damage of composite material

A self-diagnosis system and composite material technology, applied in the field of new materials, can solve the problems of not being able to intuitively reflect the material condition, not establishing a self-diagnosis system for composite material damage, etc., and achieving the effect of accurate diagnosis

Inactive Publication Date: 2012-05-30
DALIAN CHUANGDA TECH TRADE MARKET
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These current research methods have not established a self-diagnosis system for composite material damage, nor can they intuitively reflect the material condition through computer graphics.

Method used

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  • Self-diagnosing system for damage of composite material

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Embodiment Construction

[0017] Such as figure 1 As shown, the present invention is realized in this way, and the method steps are: (1) the composite material 3 adopts commercialized (G803 / 5224) carbon fiber cloth / epoxy resin prepreg as raw material, and lays layers (8 layers) according to the warp direction ), and lay out tiny copper electrodes (diameter 6mm, thickness 0.2mm, half of the electrode is exposed on the surface of the material) between the 1st and 2nd layers in a matrix equidistant (60mm spacing), and then put them into a hot press for curing and molding , prepare a composite material plate, the plate thickness is about 2.0mm, and the carbon fiber volume content is about 70%. Remove the burrs and flying burrs, cut the plate into a sample with a length*width of 200mm*150mm, polish the surface of each copper sheet electrode with fine sandpaper, and solder the wires with solder, connect the resistance measuring instrument 2 and the computer 1, and pass the resistance measuring instrument...

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Abstract

The invention relates to a self-diagnosing system for the damage of a composite material. The system is characterized in that a method comprises the following steps of: firstly, measuring resistance values of composite materials in different types before and after external forces of stretching, impacting and bending are applied, with a resistance measuring instrument, establishing a stress-resistance database of the composite material, detecting the damage of the composite material in an ultrasonic scan manner and establishing a corresponding relation of damage-resistance variation; and secondly, analyzing and processing the resistance variations of the composite material with a computer to diagnose if the damage exists in the composite material in real time and automatically generate a condition schematic diagram of the composite material. The self-diagnosing system for the damage of the composite material disclosed by the invention has the advantage that the composite material per se can be used as an induction element for mechanical and electrical performances of the composite material based on an electric conducting characteristic of the composite material so as to achieve a self-diagnosing purpose for the damage of the composite material, and the self-diagnosing system is characterized by capability of monitoring in real time, preciseness in diagnosis, direct viewing property and clearness.

Description

technical field [0001] The invention belongs to the field of novel materials, and relates to a composite material damage self-diagnosis system. Background technique [0002] The research on smart materials and structures originated in the aerospace industry in the 1980s. Composite materials with self-diagnostic functions are also smart materials. The intelligent composite material system is mainly composed of composite materials, sensing elements, and information processors. The main function of the composite material is to carry; the main function of the sensing element is to perceive the change of the internal or external conditions of the material and convert it into a corresponding signal; the information processor is the core part, which processes the output signal of the sensing element, so that the composite The condition of the material is judged. [0003] Carbon fiber reinforced resin-based composite materials have the advantages of high specific strength and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/20
Inventor 王爽
Owner DALIAN CHUANGDA TECH TRADE MARKET
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