3D photothermal imaging of real subsurface defects in anisotropic media

In this paper, we present a 3D photothermal imaging tool to detect subsurface defects in anisotropic media using the virtual wave concept. In addition, we propose a novel approach to compute the temperature contrast using a virtual wave signal, which enables a temporal noise-free representation of t...

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Bibliographic Details
Published in:Journal of applied physics 2021-12, Vol.130 (22)
Main Authors: Thummerer, G., Gahleitner, L., Mayr, G., Burgholzer, P.
Format: Article
Language:English
Subjects:
Anisotropic media
Anisotropy
Carbon fiber reinforced plastics
Computed tomography
Defects
Fiber reinforced polymers
Image reconstruction
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Summary:In this paper, we present a 3D photothermal imaging tool to detect subsurface defects in anisotropic media using the virtual wave concept. In addition, we propose a novel approach to compute the temperature contrast using a virtual wave signal, which enables a temporal noise-free representation of the contrast temperature signal. The results obtained with the proposed imaging tool are compared with those obtained using computed tomography for a carbon fiber-reinforced polymer sample containing a delamination caused by a defined impact. To sum up, this work presents a fast, easily interpretable, and efficient 3D photothermal defect reconstruction and visualization tool.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0070622