An experimental and theoretical comparison of 3D models for ultrasonic non-destructive testing of cracks: Part I, embedded cracks
Résumé
Ultrasonic Non-Destructive Testing (NDT) methods are broadly used for detection and
characterization/imaging of cracks. Simulation is of great interest for designing such NDT methods.
To model the ultrasonic 3D response of a crack, ultrasonic high frequency asymptotic (semi-analytical)
models (such as the Physical Theory of Diffraction—PTD) are known to provide accurate predictions
for most classical NDT configurations, and 3D numerical models have also emerged more recently.
The aim of this paper is to carry out for the first time an experimental and theoretical comparison of
3D models for ultrasonic NDT of embedded cracks in 3D configurations. Semi-analytical models and
a hybrid 3D FEM strategy—combining high-order spectral Finite Elements Method (FEM) for flaw
scattering and an asymptotic ray model for beam propagation—have been compared. Both numerical
validations and comparisons between simulation and experiments prove the effectiveness of PTD in
numerous configurations but validate and demonstrate the improvement provided by the 3D hybrid
code, notably for small flaws compared to the wavelength and for shear waves.
Domaines
Physique [physics]
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité
Licence : CC BY - Paternité