Microwave Evaluation of Direction and Bending Defect of Carbon Fiber in Composite Material

By studying the transmission characteristics of microwave in composite material, N5225A network analyzer was used to detect carbon fiber direction and bending defect. The amplitudes and phases of the reflection coefficient are the characteristic parameters to detect carbon fiber in composite materia...

Full description

Saved in:
Bibliographic Details
Published in:Hang kong cai liao xue bao 2015-12, Vol.35 (6), p.91-96
Main Authors: Yang, Yu-E, Yan, Tian-Ting, Ren, Bao-Sheng
Format: Article
Language:Chinese
Subjects:
Amplitudes
Bending
Carbon fibers
Composite materials
Defects
Microwaves
Phases
Reflection coefficient
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:By studying the transmission characteristics of microwave in composite material, N5225A network analyzer was used to detect carbon fiber direction and bending defect. The amplitudes and phases of the reflection coefficient are the characteristic parameters to detect carbon fiber in composite material. The results show that in 30-40GHz, both differences of the reflection coefficient amplitudes and phases increase along with the increase of operating frequency. At 40GHz, the amplitude difference and the phase difference are 48 degree and 0.37 respectively. At 36GHz, the bending defect is characterized by the phase difference, the maximum of which is 2.65 degrees. At 38GHz, the bending defect is characterized by the amplitude difference, the maximum of which is 0.004. The sensitivity to detect fiber direction is far greater than that to detect fiber bending defect.
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2015.6.015