Use of a non-collinear wave mixing technique to image internal microscale damage in concrete

This research demonstrates the feasibility of using a non-collinear wave mixing technique to image internal microscale damage throughout the interior volume of a relatively large (28 cm thick) concrete component. By exploiting the underlying mechanics of nonlinear wave mixing, it is possible to mix...

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Bibliographic Details
Published in:Journal of applied physics 2022-04, Vol.131 (14)
Main Authors: Kim, Jin-Yeon, Bellotti, Aurelio, Alapati, Prasanth, Kurtis, Kimberly E., Qu, Jianmin, Jacobs, Laurence J.
Format: Article
Language:English
Subjects:
Damage
Incident waves
Specific volume
Synchronism
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Summary:This research demonstrates the feasibility of using a non-collinear wave mixing technique to image internal microscale damage throughout the interior volume of a relatively large (28 cm thick) concrete component. By exploiting the underlying mechanics of nonlinear wave mixing, it is possible to mix two incident waves with frequencies low enough to propagate without being scattered by the inherently heterogenous, concrete microstructure, while still being sensitive to damage features with length scales well below these incident wavelengths. For this study, scanning and imaging is accomplished by manually adjusting the locations of the two incident waves, while a knowledge of the wave speeds in concrete plus synchronization identifies the location of the mixing zone—the specific volume of concrete being imaged. The viability of the proposed technique is demonstrated by examining a concrete prism specimen with known, embedded internal microscale damage.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0086194