Full wave field signal processing techniques for NDT of composites:A case study | Zendy

Joost Segers | Zendy; Saeid Hedayatrasa | Zendy; Erik Verboven | Zendy; Gaétan Poelman | Zendy; Wim Van Paepegem | Zendy; Mathias Kersemans | Zendy

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Full wave field signal processing techniques for NDT of composites:A case study

Author(s) -

Joost Segers,

Saeid Hedayatrasa,

Erik Verboven,

Gaétan Poelman,

Wim Van Paepegem,

Mathias Kersemans

Publication year - 2019

Publication title -

proceedings of meetings on acoustics

Language(s) - English

Resource type - Conference proceedings

ISSN - 1939-800X

DOI - 10.1121/2.0001067

Subject(s) - nondestructive testing , chirp , acoustics , materials science , narrowband , transducer , ultrasonic sensor , wavenumber , actuator , signal processing , center frequency , signal (programming language) , optics , laser , computer science , engineering , electronic engineering , physics , band pass filter , digital signal processing , quantum mechanics , programming language , artificial intelligence

Non-destructive testing of composites using full wave field analysis of guided waves is illustrated for a CFRP aircraft panel with production defects. The full wave field is measured using 3D scanning laser Doppler vibrometry for broadband chirp excitation through one piezoelectric actuator. First, the A0 mode is extracted through mode filtering in the frequency-wavenumber domain. Next, the measured chirp response is converted to a narrowband burst response. At last, the local wavenumber map is constructed and evaluated. A debonding defect between stiffener and base plate is detected and confirmed by the ultrasonic C-scan time-of-flight map.

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