Nondestructive Evaluation of Carbon Fiber Reinforced Polymer Composites Using Reflective Terahertz Imaging

Jin Zhang; Wei Li; Hong-Liang Cui; Changcheng Shi; Xiaohui Han; Yuting Ma; Jiandong Chen; Tianying Chang; Dongshan Wei; Yumin Zhang; Yufeng Zhou

doi:10.3390/s16060875

Sensors (Jun 2016)

Nondestructive Evaluation of Carbon Fiber Reinforced Polymer Composites Using Reflective Terahertz Imaging

Jin Zhang,
Wei Li,
Hong-Liang Cui,
Changcheng Shi,
Xiaohui Han,
Yuting Ma,
Jiandong Chen,
Tianying Chang,
Dongshan Wei,
Yumin Zhang,
Yufeng Zhou

Affiliations

Jin Zhang: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Wei Li: Research Center for Terahertz Technology, Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Hong-Liang Cui: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Changcheng Shi: Research Center for Terahertz Technology, Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Xiaohui Han: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Yuting Ma: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Jiandong Chen: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Tianying Chang: College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China
Dongshan Wei: Research Center for Terahertz Technology, Key Laboratory of Multi-scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Yumin Zhang: National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
Yufeng Zhou: National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China

DOI: https://doi.org/10.3390/s16060875
Journal volume & issue: Vol. 16, no. 6
p. 875

Abstract

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Terahertz (THz) time-domain spectroscopy (TDS) imaging is considered a nondestructive evaluation method for composite materials used for examining various defects of carbon fiber reinforced polymer (CFRP) composites and fire-retardant coatings in the reflective imaging modality. We demonstrate that hidden defects simulated by Teflon artificial inserts are imaged clearly in the perpendicular polarization mode. The THz TDS technique is also used to measure the thickness of thin fire-retardant coatings on CFRP composites with a typical accuracy of about 10 micrometers. In addition, coating debonding is successfully imaged based on the time-delay difference of the time-domain waveforms between closely adhered and debonded sample locations.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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