期刊
SMART MATERIALS AND STRUCTURES
卷 20, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0964-1726/20/4/045017
关键词
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资金
- National Research Foundation of Korea (NRF) under the Ministry of Education, Science Technology [2010-0017456, 2010-0020423]
- US Air Force Summer Faculty
- National Science Foundation (NSF) [0700411]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0700411] Funding Source: National Science Foundation
- Ministry of Education, Science & Technology (MoST), Republic of Korea [N01110016] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The paper presents signal and image processing algorithms to automatically detect delamination and disbond in composite plates from wavefield images obtained using a scanning laser Doppler vibrometer (LDV). Lamb waves are excited by a lead zirconate titanate transducer (PZT) mounted on the surface of a composite plate, and the out-of-plane velocity field is measured using an LDV. From the scanned time signals, wavefield images are constructed and processed to study the interaction of Lamb waves with hidden delaminations and disbonds. In particular, the frequency-wavenumber (f-k) domain filter and the Laplacian image filter are used to enhance the visibility of defects in the scanned images. Thereafter, a statistical cluster detection algorithm is used to identify the defect location and distinguish damaged specimens from undamaged ones.
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