Surface treatment method of damage below machining face of carbon-fiber-reinforced composite material

A technology of reinforced composite materials and surface treatment, which is applied in the fields of analyzing materials, using wave/particle radiation for material analysis, and using measurement of secondary emissions for material analysis, etc. It can solve the problems of damage expansion and failure under the surface, and achieve a clean surface The effect of complete, simple and easy-to-operate surface treatment method

Active Publication Date: 2016-08-10
DALIAN UNIV OF TECH
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Problems solved by technology

At present, there is no report on the method of preparing damaged samples of carbon fiber reinforced resin matrix composite materials; Wang Hai, Fan Yajun, etc. invented the "Preparation Method of Large-scale Titanium and Titanium Alloy Metallographic Samples", Patent Application No. 201310260852.X, It involves the pr

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  • Surface treatment method of damage below machining face of carbon-fiber-reinforced composite material
  • Surface treatment method of damage below machining face of carbon-fiber-reinforced composite material

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Embodiment Construction

[0014] The specific implementation of the embodiments of the present invention will be described in detail below in conjunction with the technical solutions and drawings.

[0015] attached figure 1 It is a schematic diagram of the grinding mechanism of the present invention, a surface treatment method for under-surface damage observation of carbon fiber reinforced composite materials, including the steps of sampling, grinding, cleaning, drying, and observation. Taking the processed unidirectional carbon fiber reinforced composite laminate as an example, the specific steps are as follows:

[0016] The first step: Sampling is to use a sawing machine to cut a processed carbon fiber reinforced composite material sample 1 with a size of about 20mm×20mm, and be careful not to damage the processed surface when sawing. At the same time, use sandpaper to clean the burrs on the edge of the sample 1. If there are protrusions on the edge of the sample 1 during processing, also use sandpa...

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Abstract

The invention relates to a surface treatment method of damage below the machining face of carbon-fiber-reinforced composite material and belongs to the field of composite materials. The treatment method uses micro amount to remove the material layer by layer and includes: sampling; grinding, to be more specific, using a grinding machine to grinding the surface of a sample by using abrasive paper as the medium to expose the damaged surface, wherein the grinding includes coarse grinding, semi-finishing grinding and finishing grinding; cleaning, to be more specific, using an ultrasonic cleaning machine to clean the ground sample so as to remove the impurities on the surface of the material; airing; observing and evaluating. The surface treatment method has the advantages that the method is simple and easy to operate and unlimited by material shape; the surface damage of the obtained sample is clean and complete, and the problem that the damage of the machined observation sample, with the damage below the machining face, of the carbon-fiber-reinforced composite material easily expands to destroy the original shape during machining is solved.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a surface treatment method for under-surface damage observation after carbon fiber reinforced composite materials are processed. Background technique [0002] Most of the carbon fiber reinforced composite parts are laid and solidified at one time and then formed as a whole. In order to meet the assembly requirements, they need to be further processed by cutting holes, cutting edges, etc. However, due to the fact that carbon fiber composites are in a multi-phase state composed of fibers, resins, and interfaces in the microscopic view, they are multi-layered and multi-directional heterogeneous anisotropy in the macroscopic view, and the strength and hardness of the carbon fiber reinforced phase are high, and they are wrapped in The strength of the resin matrix phase and interface phase around the fiber is low, and it is very easy to cause serious mechanical damage such as subsurfac...

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Application Information

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IPC IPC(8): G01N23/22
CPCG01N23/2202G01N2223/646
Inventor 王福吉毕广健宿友亮贾振元王小楠
Owner DALIAN UNIV OF TECH
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