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Modeling and Experimental Evaluation of Eddy-Current Probes for Prepreg Fiber Waviness Inspection

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Citation Author(s):
Meirbek Mussatayev («Academy of Civil Aviation» JSC, Almaty city)
Submitted by:
Meirbek Mussatayev
Last updated:
DOI:
10.21227/yaeh-5n79
Data Format:
**.mat
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Keywords:
non-destructive testing
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Abstract

This dataset provides experimental validation data supporting the proposed finite element method (FEM) for optimizing a directional eddy current testing (ECT) probe designed to detect in-plane waviness on the surface of carbon fiber prepreg. The study includes the design and evaluation of six ECT probe configurations, varying the angle and aspect ratio of the receiver coils. Sensitivity measurements were conducted to assess the probes' ability to detect fiber-related features. Results indicate that a configuration with rectangular receivers and a 10° relative angle offers effective in-line defect detection, achieving a signal-to-noise ratio (SNR) exceeding 70. Additionally, the influence of lift-off distance (up to 1 mm) on sensitivity was examined, with optimal performance observed at approximately 0.6 mm, where the SNR remained above 6. The dataset also highlights practical challenges associated with applying ECT to carbon fiber prepreg inspection.

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Read-me written by Dr. M. Mussatayev, School of Electrical, Electronic and Mechanical Engineering, University of Bristol - 0000-0001-9563-8805 (ORCID number)
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Six Probe Evaluation Experimental Results: Contains seven subfolders, each with 10 .mat files of experimental eddy-current scan repeats of uncured CFRP inspection using 8-RSQR5, 8-RSQR10 (lift-off study), 8-RSQR15, 8-RRCT5, 8-RRCT10, and 8-RRCT15 probes:

    - 8-RSQR5: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RSQR5 data for both in-plane waviness and non-defective zones at frequency ranges from 1.3 to 2.2 MHz with 0.1 MHz increments for this probe configuration.

    - 8-RSQR10: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RSQR10 data for both in-plane waviness and non-defective zones at frequency ranges from 1.3 to 2.2 MHz with 0.1 MHz increments for this probe configuration.
    
    - 8-RSQR15: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RSQR15 data for both in-plane waviness and non-defective zones at frequency ranges from 1.3 to 2.2 MHz with 0.1 MHz increments for this probe configuration.

    - 8-RRCT5: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RRCT5 data for both in-plane waviness and non-defective zones at frequency ranges from 1.1 to 2.0 MHz with 0.1 MHz increments for this probe configuration.

    - 8-RRCT10: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RRCT10 data for both in-plane waviness and non-defective zones at frequency ranges from 1.1 to 2.0 MHz with 0.1 MHz increments for this probe configuration.

    - 8-RRCT15: Contains four subfolders, each containing 10 .mat files of experimental eddy-current scan repeats using 8-RRCT15 data for both in-plane waviness and non-defective zones at frequency ranges from 1.1 to 2.0 MHz with 0.1 MHz increments for this probe configuration.
 

     - Lift-off Sensitivity Experiments: Contains four subfolders, each with 10 .mat files of experimental eddy-current scan repeat results of uncured CFRP samples obtained with lift-off distances ranging from 0.1 to 1 mm using the 8-RRCT10 probe.

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