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Kharkovsky, Sergey
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Publications (4/4 displayed)
- 2019Debonding detection in a carbon fibre reinforced concrete structure using guided wavescitations
- 2019Characterization of carbon fiber reinforced polymer strengthened concrete and gap detection with a piezoelectric-based sensory techniquecitations
- 2016Non-contact inspection of construction materials using 3-axis multifunctional imaging system with microwave and laser sensing techniquescitations
- 2011Rapid rotary scanner and portable coherent wideband Q-band transceiver for high-resolution millimeter-wave imaging applicationscitations
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article
Debonding detection in a carbon fibre reinforced concrete structure using guided waves
Abstract
Guided waves are traditionally used in different non-destructive testing applications because of their cost-effectiveness and piezoelectric patches that are easy to incorporate into the structure as transducers. The non-destructive evaluation of interfacial defects such as debonding in a composite structure is critical for safety and long-term use. A new guided wave technique to detect a variety of debondings in carbon fibre reinforced concrete structure has been developed and experimental testing has been carried out to verify the proposed approach. Five composite specimens with different debondings have been prepared. The received guided wave in the specimen with a perfect bonding is taken as a reference. This signal is compared with the received signal under different debonding conditions. The debonding is quantified using three damage indices: correlation coefficient, change in peak-to-peak and root mean square deviation. The results demonstrated that these indices could be a good indicator of the debond conditions as they correlated linearly with the extent of the debonding. The proposed method is effective in detecting interfacial defects in an existing structure without special preparation.