International Journal of Applied Science and Engineering
Published by Chaoyang University of Technology

Muhamad Hidayat1, Chih-Hung Chiang2, 3*, Max Yen2

1 Department of Construction Engineering, Chaoyang University of Technology, 168, Jifeng E. Rd., Wufeng District, Taichung City 413310, Taiwan

2 Department of Aeronautical Engineering, Chaoyang University of Technology, 168, Jifeng E. Rd., Wufeng District, Taichung City 413310, Taiwan

3 Center for NDT, Chaoyang University of Technology, 168, Jifeng E. Rd., Wufeng District, Taichung City 413310, Taiwan


 

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ABSTRACT


Physical phenomena in thin multi-layer carbon fiber reinforced polymer (CFRP) materials with defects are not always easily definable through experimental observations of thermography nondestructive testing (TNDT). The current research focuses on the transient heat distribution of the finite element model of a seven-layer CFRP plate with embedded defects. The simulated heating load is applied at the back surface of the three-dimensional FE model such that the thermal analysis is carried out to characterize the temperature profiles along various observation lines across the front surface. The sizes of the embedded defects at different depths are estimated by the full width half maximum (FWHM) method. The simulation results are verified experimentally against a CFRP specimen based on the same model design using active thermography. The defect sizes can be determined successfully by FWHM only if the surface temperature profiles are pre-processed by the data averaging technique.


Keywords: CFRP materials, TNDT, Finite element method, Simulation, Defect size.


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ARTICLE INFORMATION


Received: 2023-02-07
Revised: 2023-03-31
Accepted: 2023-04-10
Available Online: 2023-05-11


Cite this article:

Hidayat, M., Chiang, C.-H., Yen, M. Determination of the defect’s size of multi-layer woven CFRP based on its temperature profile. International Journal of Applied Science and Engineering, 20, 2023027. https://doi.org/10.6703/IJASE.202309_20(3).003

  Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.