Have a personal or library account? Click to login

Eddy Current Evaluation of Two-Layer Aircraft Structures with Carbon Fiber Reinforced Polymer Layers on Aluminum Alloy Substrates

Transactions on Aerospace Research
Volume 2025 (2025): Issue 3 (September 2025)
By:
Open Access
|Oct 2025

Figures & Tables

Fig. 1.

Two-layer structure consisting of AA (1) and CFRP (2) with EC probe (3): (a) without lift-off; (b) with lift-off hc; (c) with delamination d between the AA substrate and the CFRP layer.
Two-layer structure consisting of AA (1) and CFRP (2) with EC probe (3): (a) without lift-off; (b) with lift-off hc; (c) with delamination d between the AA substrate and the CFRP layer.

Fig. 2.

Characteristic changes in the EC probe impedance in the complex plane: (a,b) as a function of the thickness tc of the CFRP layer on AA substrate and the lift-off h influence for non-magnetic materials; (c) as a function of delamination d.
Characteristic changes in the EC probe impedance in the complex plane: (a,b) as a function of the thickness tc of the CFRP layer on AA substrate and the lift-off h influence for non-magnetic materials; (c) as a function of delamination d.

Fig. 3.

(a) Flat AA specimen (1) with stacked CFRP plates (2) and ferrite core (3) with EC probe winding (4). (b) Scheme of the parallel resonant circuit with EC probe: 1 – driving generator; 2 – power amplifier; 3 – resistor; 4 – inductance of EC probe winding; 5 – capacitance of resonant circuit; 6 – band-pass filter; 7 – voltage indicator.
(a) Flat AA specimen (1) with stacked CFRP plates (2) and ferrite core (3) with EC probe winding (4). (b) Scheme of the parallel resonant circuit with EC probe: 1 – driving generator; 2 – power amplifier; 3 – resistor; 4 – inductance of EC probe winding; 5 – capacitance of resonant circuit; 6 – band-pass filter; 7 – voltage indicator.

Fig. 4.

(a) Changes in the output voltage ΔU for the EC probe with 600 turns and (b) the corresponding dependencies of the sensitivity Stc on the thickness tc of the CFRP layer at operating frequencies of 5.0 and 8.5 kHz.
(a) Changes in the output voltage ΔU for the EC probe with 600 turns and (b) the corresponding dependencies of the sensitivity Stc on the thickness tc of the CFRP layer at operating frequencies of 5.0 and 8.5 kHz.

Fig. 5.

(a) Changes in the output voltage ΔU for the EC probe with 300 turns and (b) the corresponding dependencies of the sensitivity Stc on the thickness tc of the CFRP layer at operating frequencies of 14.0 and 20.5 kHz.
(a) Changes in the output voltage ΔU for the EC probe with 300 turns and (b) the corresponding dependencies of the sensitivity Stc on the thickness tc of the CFRP layer at operating frequencies of 14.0 and 20.5 kHz.
DOI: https://doi.org/10.2478/tar-2025-0014 | Journal eISSN: 2545-2835
Journal RSS Feed
Language: English
Page range: 62 - 74
Submitted on: Jul 14, 2025
Accepted on: Sep 23, 2025
Published on: Oct 31, 2025
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
eddy current,
carbon fiber reinforced polymer (CFRP),
thickness determination,
aluminum alloy,
structural health monitoring,
aerospace structures,
operational frequency
Related subjects:
Engineering,
Introductions and overviews,
Engineering, other,
Geosciences,
Geosciences, other,
Materials sciences,
Materials sciences, other,
Physics,
Physics, other

© 2025 Valentyn Uchanin, Oleksiy Aleschenko, Valeriy Derecha, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Previous articleVolume 2025 (2025): Issue 3 (September 2025)Next article