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Image-based simulation of wave propagation and its application to ultrasonic testing

: Nakahata, K.; Hirose, S.; Barth, M.; Köhler, B.; Schubert, F.

E-Journal of Advanced Maintenance (EJAM) 10 (2011), No.2, pp.49-56
ISSN: 1883-9894
English, Japanese
Journal Article
Fraunhofer IZFP, Institutsteil Dresden ( IKTS-MD) ()

A straightforward simulation method is desired for the reliable nondestructive ultrasonic testing (UT). The target models for the UT become more complicated than ever, such as dissimilar welding parts in nuclear power plant or debonding parts of reinforced steels in concrete material. In this study, a time domain simulation tool for ultrasonic wave propagation in heterogeneous and anisotropic materials with a complex outer surface is developed by combining the elastodynamic finite integration technique (EFIT) with an image based modeling approach. The EFIT is a grid-based spatial discretization method in conjunction with the leap-frog time marching scheme. In our simulation, geometries of targets are determined by digital images from two dimensional(2D) pictures or three dimensional(3D) CT and CAD data.