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In-plane local defect resonances for efficient vibrothermography of impacted carbon fiber reinforced plastics (CFRP)

Joost Segers (UGent) , Saeid Hedayatrasa (UGent) , Erik Verboven (UGent) , Gaétan Poelman (UGent) , Wim Van Paepegem (UGent) and Mathias Kersemans (UGent)
(2019) NDT & E INTERNATIONAL . 102. p.218-225
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Abstract
It is well known that the efficiency of the vibrothermographic non-destructive testing (NDT) technique can be enhanced by taking advantage of local defect resonance (LDR) frequencies. Recently, the classical out-of-plane local defect resonance was extended towards in-plane LDR for enhanced efficiency of vibrometric NDT. This paper further couples the concept of this in-plane LDR to vibrothermography, on the basis of the promising potential of in-plane LDRs to enhance the rubbing (tangential) interaction and viscoelastic damping of defects. Carbon fiber-reinforced composites (CFRPs) with barely visible impact damage (BVID) are inspected and the significant contribution of in-plane LDRs in vibrational heating is demonstrated. Moreover, it is shown that the defect thermal contrast induced by in-plane LDRs is so high that it allows for easy detection of BVID by live monitoring of infrared thermal images during a single broadband sweep excitation. Thermal and vibrational spectra of the inspected surface are studied and the dominant contribution of in-plane LDR in vibration-induced heating is demonstrated.
Keywords
In-plane local defect resonance (LDR_XY), Vibrothermography, Nondestructive testing (NDT), Composite materials, BVID.

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Chicago
Segers, Joost, Saeid Hedayatrasa, Erik Verboven, Gaétan Poelman, Wim Van Paepegem, and Mathias Kersemans. 2019. “In-plane Local Defect Resonances for Efficient Vibrothermography of Impacted Carbon Fiber Reinforced Plastics (CFRP).” Ndt & E International 102: 218–225.
APA
Segers, J., Hedayatrasa, S., Verboven, E., Poelman, G., Van Paepegem, W., & Kersemans, M. (2019). In-plane local defect resonances for efficient vibrothermography of impacted carbon fiber reinforced plastics (CFRP). NDT & E INTERNATIONAL , 102, 218–225.
Vancouver
1.
Segers J, Hedayatrasa S, Verboven E, Poelman G, Van Paepegem W, Kersemans M. In-plane local defect resonances for efficient vibrothermography of impacted carbon fiber reinforced plastics (CFRP). NDT & E INTERNATIONAL . Elsevier; 2019;102:218–25.
MLA
Segers, Joost et al. “In-plane Local Defect Resonances for Efficient Vibrothermography of Impacted Carbon Fiber Reinforced Plastics (CFRP).” NDT & E INTERNATIONAL 102 (2019): 218–225. Print.
@article{8586420,
  abstract     = {It is well known that the efficiency of the vibrothermographic non-destructive testing (NDT) technique can be enhanced by taking advantage of local defect resonance (LDR) frequencies. Recently, the classical out-of-plane local defect resonance was extended towards in-plane LDR for enhanced efficiency of vibrometric NDT. This paper further couples the concept of this in-plane LDR to vibrothermography, on the basis of the promising potential of in-plane LDRs to enhance the rubbing (tangential) interaction and viscoelastic damping of defects. Carbon fiber-reinforced composites (CFRPs) with barely visible impact damage (BVID) are inspected and the significant contribution of in-plane LDRs in vibrational heating is demonstrated. Moreover, it is shown that the defect thermal contrast induced by in-plane LDRs is so high that it allows for easy detection of BVID by live monitoring of infrared thermal images during a single broadband sweep excitation. Thermal and vibrational spectra of the inspected surface are studied and the dominant contribution of in-plane LDR in vibration-induced heating is demonstrated.},
  author       = {Segers, Joost and Hedayatrasa, Saeid and Verboven, Erik and Poelman, Ga{\'e}tan and Van Paepegem, Wim and Kersemans, Mathias},
  issn         = {0963-8695},
  journal      = {NDT \& E INTERNATIONAL },
  language     = {eng},
  pages        = {218--225},
  publisher    = {Elsevier},
  title        = {In-plane local defect resonances for efficient vibrothermography of impacted carbon fiber reinforced plastics (CFRP)},
  url          = {http://dx.doi.org/10.1016/j.ndteint.2018.12.005},
  volume       = {102},
  year         = {2019},
}

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