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Image-based FIT modeling for coupled elastodynamic and acoustic problems

: Takata, K.; Nakahata, K.; Schubert, F.; Köhler, B.


Thompson, D.O. ; American Institute of Physics -AIP-, New York:
Review of progress in quantitative nondestructive evaluation : San Diego, California, 18-23 July 2010, Volume 30A, Volume 30B
New York, N.Y.: AIP Press, 2011 (AIP Conference Proceedings 1335)
ISBN: 978-0-7354-0888-3
ISSN: 0094-243X
Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) <37, 2010, San Diego/Calif.>
Conference Paper
Fraunhofer IZFP, Institutsteil Dresden ( IKTS-MD) ()

This paper presents a numerical time domain modeling of acoustic, elastodynamic, and coupled waves. Our simulation tool is based on the finite integration technique (FIT) and combined with an image-based modeling approach. The FIT is a grid-based spatial discretization method that works in conjunction with a leap-frog type explicit scheme. In our simulation, geometries of targets are determined by a digital image, then the processed pixel or voxel data is directly fed into the wave simulation by the FIT. Here the modeling and simulation of the wave propagation in a concrete material including fluid-solid interactions and a non-contact ultrasonic testing are demonstrated.