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Imaging concrete cracks using Nonlinear Coda Wave Interferometry (INCWI)

Qu, Shilin / Hilloulin, Benoît / Saliba, Jacqueline / Sbartaï, Mehdi / Abraham, Odile / Tournat, Vincent

Abstract Crack imaging in highly heterogeneous materials, such as concrete, plays a great role in structural health monitoring and non-destructive evaluation and testing. Numerous works have shown that Nonlinear Coda Wave Interferometry is a robust tool to assess the overall level of nonlinearity caused by micro or macrocracks in heterogeneous media. This work presents a novel qualitative method for Imaging using NCWI (INCWI) based on the combination of Nonlinear Coda Wave Interferometry (NCWI) and a spatial averaging method. INCWI is used herein to locate cracks generated in a concrete beam subject to three-point bending. Measurements are performed after each loading level, in both pre-peak and post-peak phases, once the beam has been unloaded. The imaging algorithm is described and applied to each stage of beam damage. In the post-peak phase, crack size varies from $10$ $cm$ to $15$ $cm$ in length and from $25$ $μm$ to $200$ $μm$ in width. Also, the INCWI results are compared with acoustic emission measurements and microscopic observations.

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Imaging concrete cracks using Nonlinear Coda Wave Interferometry (INCWI)

Qu, Shilin / Hilloulin, Benoît / Saliba, Jacqueline / Sbartaï, Mehdi / Abraham, Odile / Tournat, Vincent

Abstract Crack imaging in highly heterogeneous materials, such as concrete, plays a great role in structural health monitoring and non-destructive evaluation and testing. Numerous works have shown that Nonlinear Coda Wave Interferometry is a robust tool to assess the overall level of nonlinearity caused by micro or macrocracks in heterogeneous media. This work presents a novel qualitative method for Imaging using NCWI (INCWI) based on the combination of Nonlinear Coda Wave Interferometry (NCWI) and a spatial averaging method. INCWI is used herein to locate cracks generated in a concrete beam subject to three-point bending. Measurements are performed after each loading level, in both pre-peak and post-peak phases, once the beam has been unloaded. The imaging algorithm is described and applied to each stage of beam damage. In the post-peak phase, crack size varies from $10$ $cm$ to $15$ $cm$ in length and from $25$ $μm$ to $200$ $μm$ in width. Also, the INCWI results are compared with acoustic emission measurements and microscopic observations.

Imaging concrete cracks using Nonlinear Coda Wave Interferometry (INCWI)

Qu, Shilin / Hilloulin, Benoît / Saliba, Jacqueline / Sbartaï, Mehdi / Abraham, Odile / Tournat, Vincent

Abstract Crack imaging in highly heterogeneous materials, such as concrete, plays a great role in structural health monitoring and non-destructive evaluation and testing. Numerous works have shown that Nonlinear Coda Wave Interferometry is a robust tool to assess the overall level of nonlinearity caused by micro or macrocracks in heterogeneous media. This work presents a novel qualitative method for Imaging using NCWI (INCWI) based on the combination of Nonlinear Coda Wave Interferometry (NCWI) and a spatial averaging method. INCWI is used herein to locate cracks generated in a concrete beam subject to three-point bending. Measurements are performed after each loading level, in both pre-peak and post-peak phases, once the beam has been unloaded. The imaging algorithm is described and applied to each stage of beam damage. In the post-peak phase, crack size varies from $10$ $cm$ to $15$ $cm$ in length and from $25$ $μm$ to $200$ $μm$ in width. Also, the INCWI results are compared with acoustic emission measurements and microscopic observations.

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Title:

Imaging concrete cracks using Nonlinear Coda Wave Interferometry (INCWI)

Contributors:

Qu, Shilin (author) / Hilloulin, Benoît (author) / Saliba, Jacqueline (author) / Sbartaï, Mehdi (author) / Abraham, Odile (author) / Tournat, Vincent (author)

Published in:

Construction and Building Materials ; 391

Publication date:

2023-05-10

ISSN:

DOI:

https://doi.org/10.1016/j.conbuildmat.2023.131772

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Concrete , Coda , Nonlinear acoustics , Crack breathing , Ultrasound , Acoustic emission , NCWI

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