ISSN 3041-1823. Information Extraction and Processing. 2025. Issue 53 (129)
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Detection and identification of internal defects in CFRP-concrete bonded joint using optical-acoustic system
Muravsky L.I.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Dutkiewicz M.
Bydgoszcz University of Sciences and Technology, Bydgoszcz, Poland
Sharabura O.M.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Kuts O.H.
Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, Lviv
Panchenko O.V.
Sika Ukraine, Kyiv

https://doi.org/10.15407/vidbir2025.53.039

Keywords: optical-acoustic system, CFRP-concrete bonded joint, optical-acoustic method, CFRP tape, elliptical debonding defect, dynamic speckle patterns, digital speckle pattern, optical spatial response, orthotropic elliptical plate, fundamental resonance frequency.

Cite as: Muravsky, L. I.; Dutkiewicz, M.; Sharabura, O. M.; Kuts, O. G.; Panchenko O. V. Detection and identification of internal defects in CFRP-concrete bonded joint using optical-acoustic system. Information Extraction and Processing 2025, 53(129), 39-46. DOI:https://doi.org/10.15407/vidbir2025.53.039

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Abstract

The optical-acoustic system (OAS) breadboard for detection and identification of internal defects implementing the developed optical-acoustic method is considered. The CFRP-concrete bonded joint sample containing the CFRP tape Sika CarboDur M514 and two elliptical debonding defects is prepared. The elliptical optical spatial responses from these defects at the OAS output are obtained at the fundamental resonance frequencies. The theoretical fundamental resonance frequencies of debonding defects are calculated using the formula for elliptical orthotropic plate and received orthotropic elastic constants of the CFRP tape. There is a slight deviation of the theoretical resonance frequencies from the experimental ones, which is explained by the small ratio of the sizes of defects to the depth of their occurrence. The subsurface portion of the crack in the test concrete beam was also detected using the OAS breadboard. Based on the developed OAS breadboard, it is possible to create simple and high-speed optical-digital systems for NDT of CFRP-concrete bonded joints used in civil and industrial engineering.

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