Ultrasonic Wave Propagation in Inhomogeneous, Anisotropic Cast Stainless Steel

Validity of the Gauss-Hermite beam model in an anisotropic layered medium: comparison to the finite element method

“…Last year a comparison of predictions of the Gauss-Hermite model and finite difference methods was reported [6]. A fully quantitative comparison of these results was impossible because of certain differences in the initial assumptions, but the results were sufficiently encouraging to warrant further study.…”

Ultrasonic beam models in anisotropic media

“…WEN and BREAZEALE [64] developed a 10 Gaussian expansion for a circular, planar piston probe, which made it practical to use Gaussian beam models to represent these piston probes. MINACHI and THOMPSON [35] combined the earlier work on Gaussian beams and the Gaussian superposition to treat piston transducer radiation through planar and curved interfaces into i.sotropic and anisotropic solids.…”

“…Those slowness surfaces are widely used in the literature [37]. [35], [41]. we expect that beam models based on the paraxial approximation will fail so that it is important to know where these points occur on the slowness surface.…”