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Inspection of impact damage on CFRP by lock-in induction thermography
Author(s): Ting Liu; Yu Zhang; Udo Netzelmann; Jianguang Guo; Wang Zhang
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Paper Abstract

In this paper, carbon fiber reinforced polymer (CFRP) is tested using lock-in thermography, which is excited by an induction coil. A impact-damaged CFRP plate was available and measured as a function of the angle between a linear excitation coil and the main fiber directions. The amplitude and phase images of high signal-to-noise ratio (SNR) was obtained by Fast Fourier Transform (FFT). The relationship between angle sensitivity of included angle and crack shape is analyzed. The results show that the circular symmetry is basically maintained when the defect is linear. When the structure of defects is similar to that of bifurcated trees, the angular distribution is quite different, which are consistent with the results of X-ray imaging.

Paper Details

Date Published: 20 December 2019
PDF: 9 pages
Proc. SPIE 11209, Eleventh International Conference on Information Optics and Photonics (CIOP 2019), 1120954 (20 December 2019); doi: 10.1117/12.2549987
Show Author Affiliations
Ting Liu, Southwest Jiaotong Univ. (China)
Yu Zhang, Southwest Jiaotong Univ. (China)
Udo Netzelmann, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP (Germany)
Jianguang Guo, Southwest Jiaotong Univ. (China)
Wang Zhang, Southwest Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 11209:
Eleventh International Conference on Information Optics and Photonics (CIOP 2019)
Hannan Wang, Editor(s)

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