On the contrary, experimental and simulated echodynamic curves (obtained with an incidence of 19°) of the direct echo of the SDH in the planar and cylindrical parts (T45° in the specimen) are very close. Indeed, for these incidence angles there are no head waves generated on the surface.
The experimental and simulated Ascans of the direct echoes of the SDH inspected with an incidence angle of 19° are also in good agreement.
- At the incidence angle of 16°, the echodynamic curve of the T direct echo of the SDH is poorly predicted by CIVA because head waves are not taken into account. It is also possible that head waves are generated during each skip of the T beam on the surface of the cylinder. This would make the error being cumulative for the prediction of multiple echoes of the SDH.
- At the incidence of 19°, the direct and indirect echoes of SDH are well predicted.
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