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Erschienen in: Journal of Nondestructive Evaluation 3/2017

01.09.2017

A Procedure for Detecting Hidden Surface Defects in a Thin Plate by Means of Active Thermography

verfasst von: Gabriele Inglese, Roberto Olmi, Saverio Priori

Erschienen in: Journal of Nondestructive Evaluation | Ausgabe 3/2017

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Abstract

Let \(\varOmega _\epsilon \) be a metallic plate whose top inaccessible surface has been damaged by some chemical or mechanical agent. We heat the opposite side and collect a sequence of temperature maps \(u^\epsilon \). Here, we construct a formal explicit approximation of the damage \(\epsilon \theta \) by solving a nonlinear inverse problem for the heat equation in three steps: (i) smoothing of temperature maps, (ii) domain derivative of the temperature, (iii) thin plate approximation of the model and perturbation theory. Our inversion formula is tested with realistic synthetic data and used in a real laboratory experiment.

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Metadaten
Titel
A Procedure for Detecting Hidden Surface Defects in a Thin Plate by Means of Active Thermography
verfasst von
Gabriele Inglese
Roberto Olmi
Saverio Priori
Publikationsdatum
01.09.2017
Verlag
Springer US
Erschienen in
Journal of Nondestructive Evaluation / Ausgabe 3/2017
Print ISSN: 0195-9298
Elektronische ISSN: 1573-4862
DOI
https://doi.org/10.1007/s10921-017-0440-6

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