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27 April 2023 Damage detection on composite structures with directional wavenumber spectroscopy with steady-state excitations
Hyeonwoo Nam, Jun Young Jeon, Yeseul Kong, Gyuhae Park, Chan-Yik Park
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Proceedings Volume 12487, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVII; 124870L (2023) https://doi.org/10.1117/12.2658248
Event: SPIE Smart Structures + Nondestructive Evaluation, 2023, Long Beach, California, United States
Abstract
This paper presents an improved damage detection technique for composite structures using a steady state excitation based on the use of a laser doppler vibrometer (LDV). Employing a single, fixed frequency excitation from a mounted piezoelectric transducer, the full steady-state wavefield could be obtained using a LDV with a mirror-tilting device. After scanning completed in high speed, a wavenumber filtering is applied to determine the dominant wavenumber components of the measured wavefield, which could be used for a damage sensitive feature. In this process, the directional correction of the wavenumber is performed to minimize the anisotropic characteristic in local wavenumber estimation. For validation of this proposed technique, several experiments were performed on composite structures with delamination damage. The results showed that the proposed technique is very efficient in detecting and quantifying delamination and debonding damage on composite structures.
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Hyeonwoo Nam, Jun Young Jeon, Yeseul Kong, Gyuhae Park, and Chan-Yik Park "Damage detection on composite structures with directional wavenumber spectroscopy with steady-state excitations", Proc. SPIE 12487, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVII, 124870L (27 April 2023); https://doi.org/10.1117/12.2658248
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KEYWORDS
Composites
Damage detection
Spectroscopy
Laser Doppler velocimetry
Doppler effect
Optical filters
Transducers
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