Method of establishing damnification self-diagnosis system for carbon fiber enhancement resin base composite material

A resin-based, self-diagnostic system technology that is applied in the direction of testing material strength and material resistance using a single impact force, testing material strength using a stable bending force, etc., can solve the problem of not being able to intuitively reflect the status of materials and not building composite materials Damage self-diagnosis system and other issues to achieve accurate diagnosis

Inactive Publication Date: 2009-10-07
NANCHANG HANGKONG UNIVERSITY +1
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Problems solved by technology

These current research methods have not established a self-diagnosis system for composite mate

Method used

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  • Method of establishing damnification self-diagnosis system for carbon fiber enhancement resin base composite material

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Embodiment Construction

[0017] Such as figure 1 Shown, the present invention is realized like this, and method step is: (1) composite material 3 adopts commercialization (G803 / 5224) carbon fiber cloth / epoxy resin prepreg as raw material, lays up (8 layers) according to warp direction ), and arrange tiny copper sheet 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 , to prepare a composite material sheet, the thickness of the sheet is about 2.0mm, and the volume content of carbon fiber 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 2 Measu...

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Abstract

A method of establishing a damnification self-diagnosis system for carbon fiber enhancement resin base composite material is characterized in that the steps includes: (1) measuring the front and the rear electrical resistances of different type composite materials with epigene actions of stretching, impacting and bending by a electrical resistance measuring instrument, building a stress-electrical resistance database of the composite material, determining the damnification of the composite material by using a ultrasound scanning method, and determining the corresponding relation of damnification-electrical resistance variation; (2) analyzing and processing the composite material electrical resistance variation by a computer, diagnosing whether the composite material having damnification or not real time, and generating automatically a abridged general view of the composite material status. The advantage of the invention is that by means of using the conductivity characteristics of the composite material, the composite material is taken as an inductive element for its mechanics and electrology performance, so as to self-diagnosing the damnification of the composite material. The system has the characteristics of real time monitoring, accurate diagnosis, and the system is visual and intelligible.

Description

technical field [0001] The invention relates to a method for establishing a damage self-diagnosis system for carbon fiber reinforced resin matrix composite materials. 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 spe...

Claims

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Application Information

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IPC IPC(8): G01N27/04G01N3/08G01N3/30G01N3/20
Inventor 谢小林李志鹏权红英王高潮张恒锋李薇黄领才杨楠楠
Owner NANCHANG HANGKONG UNIVERSITY
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