Local estimation of thermal effusivity by stimulated infrared thermography

Kamel Mouhoubi (1) , Jean-Luc Bodnar (1) , Jean-Marc Vallet (2) , Vincent Detalle (3)

1 GRESPI - Groupe de Recherche en Sciences Pour l'Ingénieur - EA 4694
2 CICRP - Centre Interdisciplinaire de Conservation et Restauration du Patrimoine
3 C2RMF - Centre de recherche et de restauration des musées de France

Our laboratory specializes in the study of alterations affecting works of art such as frescoes[1,2]. Thermal effusivity is a thermophysical quantity that allows us to detect alterations or to highlight contamination of chemical species in these works such as hygroscopic salts. The two approaches presented here, based on the analysis of lateral heat scattering following local laser excitation, make it possible to arrive at a good estimate of this thermophysical quantity, independently of the thickness of the samples and without taking samples (which is an advantage for the analysis of works of art).

Mots clés: thermography; stimulated infrared; thermal characterization; effusivity; non-destructive testing; laser

Domaines: Mécanique des matériaux [physics.class-ph]

Kamel Mouhoubi, Jean-Luc Bodnar, Jean-Marc Vallet, Vincent Detalle. Local estimation of thermal effusivity by stimulated infrared thermography. 2018 Quantitative InfraRed Thermography, Jun 2018, Berlin, Germany. ⟨10.21611/qirt.2018.p14⟩. ⟨hal-02098159⟩