Optimisation of the process of X-ray tomography applied to the detection of defects in composites materials

Cyril Uhry (1, 2) , François Guillet (2) , Philippe Duvauchelle (1) , Valérie Kaftandjian (1)

1 LVA - Laboratoire Vibrations Acoustique
2 CEA Le Ripault - CEA Le Ripault

Computed tomography (CT) is a relevant nondestructive inspection method for composite material. However, X-ray attenuation contrast difference between fibers and matrix can be low, which makes identification of defects difficult. Optimization of the tomographic process has then to be considered, such as studying the acquisition parameters and phenomena that decrease the contrast. Simulation of the CT method is considered in order to optimize contrast between fibers and matrix. Simulation allows to study phenomena independently to the others. Phantom was built in order to check the accuracy of the computation. Even though results show discrepancies between computation and experimental measurements, these discrepancies have been found to be due to an experimental artefact. When corrected, simulation fits very well with experimental results and this procedure allows to seek an optimal setup for composite material inspection.

Mots clés: computed tomography; X-ray detectors and sources; defect detection; scattering; simulation; X-ray imaging; non-destructive testing; virtual X-ray imaging

Domaines: Sciences de l'ingénieur [physics]

Cyril Uhry, François Guillet, Philippe Duvauchelle, Valérie Kaftandjian. Optimisation of the process of X-ray tomography applied to the detection of defects in composites materials. Digital Industrial Radiology and Computed Tomography, Ghent University, Jun 2015, Ghent, Belgium. ⟨hal-01282326⟩