160899 20260423074713.0 doi 10.1016/j.ndteint.2025.103417 sideral 144084 ART-2025-144084 eng Pérez-Arbulu, Jon Characterization of semi-infinite inhomogeneous delaminations using lock-in thermography 2025 Delaminations are buried defects parallel to the surface. Beyond detection, the challenge is to size the geometrical parameters of the delamination. For detection and characterization purposes, we propose using optically excited lock-in infrared thermography. In previous papers we dealt with infinite and semi-infinite delaminations featuring homogeneous thickness, i.e. constant thermal resistance. In this work, with the aim of approaching real life flaws, we propose to characterize semi-infinite heterogeneous delaminations, i.e. of varying thickness. We calculate the surface temperature oscillation analytically. Then, we perform experiments on calibrated delaminations of triangular cross-section. By fitting the analytical model to the experiments, we obtain the morphological parameters of the delamination. The quality of the fittings allows us to unambiguously distinguish between homogeneous and heterogeneous delaminations. info:eu-repo/grantAgreement/ES/MICIU/PID2023-146099OB-100 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-0048-3036 Ciria, José Carlos Universidad de Zaragoza Mendioroz, Arantza (orcid)0000-0003-2183-2159 Celorrio, Ricardo Universidad de Zaragoza Salazar, Agustín 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 155 (2025), 103417 [7 p.] NDT E int. NDT and E International 0963-8695 2225507 http://zaguan.unizar.es/record/160899/files/texto_completo.pdf Versión publicada info:eu-repo/date/embargoEnd/2026-04-19 2553793 http://zaguan.unizar.es/record/160899/files/texto_completo.jpg?subformat=icon icon Versión publicada info:eu-repo/date/embargoEnd/2026-04-19 oai:zaguan.unizar.es:160899 articulos driver 2026-04-22-08:40:04 ARTICLE