Infrared Image Processing to Guide the Identification of Damage and Dissipative Mechanisms in 3D Layer-to-Layer Woven Composites

Libor Navrátil (1) , Vincent Le Saux (1) , Sylvain Leclercq , Nicolas Carrere (1) , Yann Marco (1)

1 IRDL - Institut de Recherche Dupuy de Lôme

This article discusses techniques that aim at facilitating the identification of dissipative mechanisms activated in woven composites under cyclic loadings. The focus is put on the post-processing of thermal measurements acquired during heat build-up experiments, as these are usually used to identify the dissipation sources. The importance of motion compensation pre-processing is demonstrated as it is shown that the latter enhances the quality of the evaluated thermoelastic and dissipation fields. Two specific post-processing techniques are presented in this article. The first one analyzes temperature or thermoelastic fields and searches to detect thermal events associated with the creation of cracks. The second one is based on a Fourier decomposition of thermal fields and aims at highlighting an increased contribution of friction as a dissipation source.

Mots clés: Composite materials; Damage detection; Motion compensation; Thermoelasticity

Domaines: Mécanique [physics.med-ph]

Libor Navrátil, Vincent Le Saux, Sylvain Leclercq, Nicolas Carrere, Yann Marco. Infrared Image Processing to Guide the Identification of Damage and Dissipative Mechanisms in 3D Layer-to-Layer Woven Composites. Applied Composite Materials, 2022, ⟨10.1007/s10443-022-10023-6⟩. ⟨hal-03635303⟩