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Nondestructive tracking and evaluation method for quality of antenna housing made of composite material

A composite material and evaluation method technology, which is applied in the field of non-destructive tracking and evaluation of the quality of quartz fiber reinforced silica composite radome, to achieve the effect of improving the yield

Active Publication Date: 2015-01-28
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a method for non-destructive tracking and evaluation of the quality of the radome made of quartz fiber reinforced silica composite material. It provides accurate quantitative analysis of defects such as uneven density of fabrics and density gradients caused by composite processes, which is of great engineering significance for the accurate positioning, qualitative and analysis of internal quality defects of large-scale radome components, and provides a basis for online non-destructive testing and quality of radome. Control provides an important means

Method used

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  • Nondestructive tracking and evaluation method for quality of antenna housing made of composite material
  • Nondestructive tracking and evaluation method for quality of antenna housing made of composite material
  • Nondestructive tracking and evaluation method for quality of antenna housing made of composite material

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Embodiment 1

[0052] (1) Preparation of standard samples of quartz fiber reinforced silica composites

[0053] The density of the finished product radome of quartz fiber reinforced silica-based composite material is 1.70~1.90g / cm 3 Within the range, the density of the reinforcement fabric is 0.90~1.20g / cm 3 , in order to determine the numerical relationship between the density of the radome material (including the reinforcement fabric) and the CT gray value, the same preparation process as that of the radome was adopted, and the density distribution was 0.90-1.90g / cm 3 For the standard samples (including reinforcement fabrics) within the scope, the shape of the samples is a cube with a side length of 20mm.

[0054] (2) Determine the test conditions

[0055] Considering the density distribution of the standard sample, after conducting a large number of tests to optimize the test parameters, the test parameters are selected as follows: voltage 120±20KV, current 200±60mA, reconstruction matr...

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Abstract

The invention relates to a nondestructive tracking and evaluation method for the quality of an antenna housing made of a composite material. In the method, a CT analysis technology is taken as the basis, a function relationship between the density of a quartz fiber reinforced silicon-dioxide-based composite material limited structure unit series and a CT gray value is established, the density distribution and the defect location of the antenna housing can be represented by utilizing the CT test result of the antenna housing in practical detection, and the accurate quantitative analysis can be carried out on defects such as holes in antenna housing components, local serious low-density areas, and density gradient caused by uneven density of fabrics and a compound technology. The method has the great engineering significance for carrying out accurate locating, nature-determining and analyzing on quality defects insides the components of the large-size antenna housing, and provides the important means for on-line nondestructive testing and quality control of the antenna housing.

Description

technical field [0001] The invention belongs to the technical field of composite material analysis and detection, and relates to a method for non-destructive tracking and evaluation of the quality of a composite material radome, in particular to a method for non-destructive tracking and evaluation of the quality of a quartz fiber-reinforced silica composite material radome. Background technique [0002] The radome is a large-scale thick-walled structure of a revolving body, and the radome material is mainly ceramic-based composite materials, such as quartz fiber-reinforced silica-based composite materials (SiO 2f / SiO 2 ). The preparation process of this material includes the weaving of fiber preforms and the densification of composite materials. During the weaving process, metal inclusions may be caused by broken needles, metal debris, etc., or macroscopic holes may appear inside the material due to lack of yarn. In addition, due to the uneven distribution of fabric densi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
Inventor 张大海孙妮娟梅思杨范锦鹏金虎赖文恩刘云轻曹淑伟
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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