170047 20260316092630.0 doi 10.1007/s10921-026-01341-x sideral 148488 ART-2026-148488 eng Ciria-Cosculluela, José C. Universidad de Zaragoza (orcid)0000-0002-0048-3036 Sizing wedge delaminations using lock-in thermography 2026 Sizing hidden defects is a major challenge in many industries. In the last years we have successfully used optically excited lock-in infrared thermography to size the geometrical parameters of both infinite and semi-infinite uniform delaminations. In this work, we study more realistic flaws, by dealing with wedge delaminations of continuously varying width, depth, thickness and combination of two of them. As these parameters vary slowly, the previously developed analytical model for semi-infinite delamination remains valid. We present experimental data taken by applying lock-in infrared thermography on stainless steel samples containing calibrated wedge delaminations. The resulting amplitude and phase thermograms are fitted to the analytical model to obtain the parameters describing the geometry of the delaminations. The agreement found between the retrieved geometry and the true varying parameters strengthens lock-in infrared thermography as a powerful tool to size hidden defects. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MICIU/PID2023-146099OB-100 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pérez-Arbulu, Jon Salazar, Agustín Celorrio, Ricardo Universidad de Zaragoza (orcid)0000-0003-2183-2159 Mendioroz, Arantza 2005 595 Universidad de Zaragoza Dpto. Matemática Aplicada Área Matemática Aplicada 5007 075 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Ciencia Comput.Intelig.Ar 45, 44 (2026), 13 J. nondestr. eval. JOURNAL OF NONDESTRUCTIVE EVALUATION 0195-9298 2687615 http://zaguan.unizar.es/record/170047/files/texto_completo.pdf Versión publicada 2465723 http://zaguan.unizar.es/record/170047/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:170047 articulos driver 2026-03-16-08:17:34 ARTICLE