title: Calculation of high frequency ultrasonic signals for shear wave insonification in solid material.
abstract: The goal of the theoretical part is to simulate an automatic ultrasonic inspection with contact technique shear wave probes, where the high frequency signals are captured and used to perform a reconstruction based on the synthetic aperture focusing method "SAFT". Therefore the ultrasonic probe, the scanning path and the defects are parameters in a CAD model. The scattering behavior of the defect is calculated by the Kirchhoff approximation in its elastodynamic version. The result of the simulation--the high frequency data--and the result of the SAFT-reconstructions are compared with experimental results on a steel test block with side drilled and flat bottom holes. The model is validated by the experiment. One of the applications of the model is to identify multiple reflections.
authors.affiliation: Fraunhofer-Institut Zerstörungsfreie Prüfverfahren, IZFP, University Building, 37, Saarbrücken 66123, Germany. schmitz@izfp.fhg.de
authors.forename: V
authors.initials: V
authors.lastname: Schmitz
authors.forename: K J
authors.initials: KJ
authors.lastname: Langenberg
authors.forename: S
authors.initials: S
authors.lastname: Chakhlov