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Application-directed modeling of radiation and propagation of elastc waves in anisotropic media: GPSS and OPOSSM

 
: Spies, M.; Walte, F.

Chimenti, D.; Thompson, D.O.:
Review of Progress in Quantitative Nondestructive Evaluation. 14A
New York/N.Y.: Plenum Press, 1995 (Review of Progress in Quantitative Nondestructive Evaluation 14A)
ISBN: 0-306-45062-3
pp.1013-1020
Annual Review of Progress in Quantitative Nondestructive Evaluation <21, 1994, Snowmass Village/Co.>
English
Conference Paper
Fraunhofer IZFP ()
Anisotropie; anisotropy; modeling; Modellierung; point-source synthesis; Prüfkopf; Punktquellensynthese; transducer-modeling; Ultraschallprüfung; ultrasonic testing

Abstract
Based on a theory of elastic wave propagation in transversely isotropic media, the Generalized Point-Source-Synthesis-method (GPSS) has been developed to model the radiation, propagation and scattering of elastic waves as generated by ultrasonic trasnducers in this media. The method accounts for the three dimensionality and the vectorial character of anisotropic wave phenomena and is particularly useful in view of application-directed modeling at low computation times. A specifically interseting outcome is OPoSSM (Optimization by Point-Source-Synthesis-Modeling) which allows optimized dimensioning and build-up of complex transducers according to their selected field of application. In this contribution, results are presented for austenitic weld material and fiber composites. Furthermore, OPoSSM-results on optimized TR-array-probes are presented as well as snapshots of transducer-generated wavefronts.

: http://publica.fraunhofer.de/documents/PX-4306.html