Infrared Thermography for Damage Monitoring at intermediate Strain Rates: application to transverse cracking evolution in cross-ply laminates

Utilisation de la thermographie infrarouge pour le suivi de l'endommagement aux vitesses intermédiaires : application à la fissuration matricielle dans les stratifiés

Julien Berthe (1)

1 DMAS, ONERA [Lille]

With the increase of the use of composite materials, various experimental methodologies have been proposed to characterise the matrix crack density evolution in cross-ply laminates for quasi-static loadings. These methodologies cannot easily be extended to intermediate or high strain rate loadings as they rely on interrupted tests. In this work, a new approach is considered relying on the use of passive infrared thermography to capture the transverse cracking appearance. The objective of this study is twofold. On one hand confirm that the classically used assumption that the crack propagation is instantaneous from side to side in the specimen remains valid with the loading rate increase. On the other hand, study the influence of the loading rate increase on the crack density evolution with respect to the applied load.

Mots clés: CFRP; Infrared Thermography; Material Characterisation; Matrix crack density

Mots clés: CFRP; Thermographie infrarouge; Caractérisation matériaux; Taux de fissuration matricielle

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]; Chimie

Julien Berthe. Infrared Thermography for Damage Monitoring at intermediate Strain Rates: application to transverse cracking evolution in cross-ply laminates. ECCM18 – 18th European Conference on Composite Materials, Jun 2018, Athens, Greece. ⟨hal-03189068⟩