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Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites

Joost Segers (UGent) , Saeid Hedayatrasa (UGent) , Gaétan Poelman (UGent) , Wim Van Paepegem (UGent) and Mathias Kersemans (UGent)
Author
Organization
Abstract
A NDT procedure is proposed for damage detection in composites using full wavefield measurement obtained using a laser Doppler vibrometer. Vibrations are excited using two low-power piezoelectric actuators leading to nonlinear elastic wave modulation at the defect. One actuator is supplied with a broadband chirp signal and the other actuator is supplied with a single-frequency sine signal. First, a time-frequency filtering method is proposed to extract specific nonlinear components of interest (e.g. second higher harmonic and first modulation sideband) without the need for multiple excitation sequences. Next, damage maps are constructed using broadband bandpower calculation of the filtered nonlinear components. It is demonstrated that the modulation sidebands provide an exclusive imaging of defect nonlinearity, and are not affected by potential source nonlinearity. The proposed damage map construction procedure is applied for various carbon fiber reinforced polymer test specimens with different damage features: (i) coupon with quasi static indentation damage, (ii) coupon with artificial delaminations, (iii) bicycle frame with impact damage and (iv) stiffened aircraft panel with partially debonded stiffener. The obtained results indicate the high performance of the developed procedure for detection of various defect types in curved and/or stiffened CFRP components.
Keywords
Composites, Nonlinearity, Elastic wave modulation, Bandpower, Scanning laser Doppler vibrometry, Non-destructive testing

Citation

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MLA
Segers, Joost, et al. “Broadband Nonlinear Elastic Wave Modulation Spectroscopy for Damage Detection in Composites.” STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL, 2021.
APA
Segers, J., Hedayatrasa, S., Poelman, G., Van Paepegem, W., & Kersemans, M. (2021). Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL.
Chicago author-date
Segers, Joost, Saeid Hedayatrasa, Gaétan Poelman, Wim Van Paepegem, and Mathias Kersemans. 2021. “Broadband Nonlinear Elastic Wave Modulation Spectroscopy for Damage Detection in Composites.” STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL.
Chicago author-date (all authors)
Segers, Joost, Saeid Hedayatrasa, Gaétan Poelman, Wim Van Paepegem, and Mathias Kersemans. 2021. “Broadband Nonlinear Elastic Wave Modulation Spectroscopy for Damage Detection in Composites.” STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL.
Vancouver
1.
Segers J, Hedayatrasa S, Poelman G, Van Paepegem W, Kersemans M. Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites. STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL. 2021;
IEEE
[1]
J. Segers, S. Hedayatrasa, G. Poelman, W. Van Paepegem, and M. Kersemans, “Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites,” STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL, 2021.
@article{8695630,
  abstract     = {{A NDT procedure is proposed for damage detection in composites using full wavefield measurement obtained using a laser Doppler vibrometer. Vibrations are excited using two low-power piezoelectric actuators leading to nonlinear elastic wave modulation at the defect. One actuator is supplied with a broadband chirp signal and the other actuator is supplied with a single-frequency sine signal. First, a time-frequency filtering method is proposed to extract specific nonlinear components of interest (e.g. second higher harmonic and first modulation sideband) without the need for multiple excitation sequences. Next, damage maps are constructed using broadband bandpower calculation of the filtered nonlinear components. It is demonstrated that the modulation sidebands provide an exclusive imaging of defect nonlinearity, and are not affected by potential source nonlinearity. 
The proposed damage map construction procedure is applied for various carbon fiber reinforced polymer test specimens with different damage features: (i) coupon with quasi static indentation damage, (ii) coupon with artificial delaminations, (iii) bicycle frame with impact damage and (iv) stiffened aircraft panel with partially debonded stiffener.
The obtained results indicate the high performance of the developed procedure for detection of various defect types in curved and/or stiffened CFRP components.}},
  author       = {{Segers, Joost and Hedayatrasa, Saeid and Poelman, Gaétan and Van Paepegem, Wim and Kersemans, Mathias}},
  issn         = {{1475-9217}},
  journal      = {{STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL}},
  keywords     = {{Composites,Nonlinearity,Elastic wave modulation,Bandpower,Scanning laser Doppler vibrometry,Non-destructive testing}},
  language     = {{eng}},
  title        = {{Broadband nonlinear elastic wave modulation spectroscopy for damage detection in composites}},
  year         = {{2021}},
}