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A computationally efficient modeling code for SH-waves in austenitic welds using an explicit space-time green-function

 
: Spies, M.; Kröning, M.

Chimenti, D.E.; Thompson, D.O.:
Review of Progress in Quantitative Nondestructive Evaluation. 15A
New York/N.Y.: Plenum Press, 1996 (Review of Progress in Quantitative Nondestructive Evaluation 15A)
ISBN: 0-306-45310-X
pp.145-152
Annual Review of Progress in Quantitative Nondestructive Evaluation <22, 1995, Seattle>
English
Conference Paper
Fraunhofer IZFP ()
Green's function; Greensche Funktion; modeling; Schweißnahtprüfung; SH-wave; SH-Welle; shear horizontal wave; transversale Isotropie; transverse isotropy; weld inspection

Abstract
For ultrasonic inspection of austenitic welds and cladded components horizontally polarized shear (SH) waves have certain benefits compared with quasi-vertically polarized shear and quasi-pressure waves. In this contribution, a computationally efficient modeling code is presented for SH-waves propagating in transversely isotropic media, thus particularly applicable to ideally fiber-tetured austenitic weld material. An explicit space-time farfield representation of Green's dyadic function has been derived with respect to the wave type under concern, the fiber direction being included as a free parameter. The obtained relationships have been applied to the Generalized Point-Source-Synthesis method (GPSS) to model radiation, propagation and scattering effects. The GPSS-code thus improved is characterized by a considerable reduction of computer run-time and is therefore paricularly convenient in view of a respective extension to inhomogeneous weldments

: http://publica.fraunhofer.de/documents/PX-8307.html