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Numerical Modeling and Imaging of Three-Dimensional Transducer Fields in Anisotropic Materials

: Batra, N.K.; Simmonds, K.E.; Mignogna, R.B.; Spies, M.

Thompson, D.O.; Chimenti, D.E.; Höller, P.:
Review of Progress in Quantitative Nondestructive Evaluation. 16A
New York: Plenum Press, 1997 (Review of Progress in Quantitative Nondestructive Evaluation 16A)
ISBN: 0-306-45597-8
Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) <23, 1996, Brunswick/Me.>
Symposium on Quantitative Nondestructive Evaluation <23, 1996, Brunswick/Me.>
Fraunhofer IZFP ()
Anisotropie; anisotropy; dreidimensionale Visualisierung; field pattern; longitudinal wave; Longitudinalwelle; Modellierung; modelling; Schallfeld; Schweißgut; threedimensional visualisation; weld material

Piezoelectric transducers are the basic tool for ultrasonic NDE applications and are commercially available in a wide variety of sizes, shapes and frequencies. However, the information that is typically provided for these transducers by the vendors is of limited value. This is especially true when it comes to testing of anisotropic structural materials. In this paper, a previously developed methodology to map radiation fields for piezoelecetric transducers is applied to the imaging of three-dimensional transducer fields generated in anisotropic propagation media. The processed data files are calculated for transversely (multicrystalline) isotropic materials via the Generalized Point-Source-Synthesis (GPSS) method. The synthetic data is transferred to an imaging workstation, where the 3D-transducer fields are displayed using commercially available graphic packages. The fields of circular contact-transducers of several frequencies are shown for different austenitic weld material configur ations.