#### Location

La Jolla, CA

#### Start Date

1-1-1989 12:00 AM

#### Description

Lamb-waves are the elliptically polarized resonant modes of propagation in an isotropic solid plate with free boundaries. For a given plate thickness d and an ultrasonic frequency f, there exist a finite number of such propagation modes described by the associated phase velocity. A complete description of this dispersion structure is typically given in the form of a set of dispersion curves, one for each resonant mode, showing the variation of the Lamb-wave phase velocity as a function of the product fd. In general, Lamb-wave modes can be grouped into two fundamental types: symmetric modes or antisymmetric modes, depending on whether their displacement vector is symmetric or antisymmetric with respect to the median plane of the solid plate.

#### Volume

8B

#### Chapter

Chapter 9: Characterization of Materials

#### Section

Ferrous Materials and Methods

#### Pages

2113-2118

#### DOI

10.1007/978-1-4613-0817-1_268

#### Copyright Owner

Springer-Verlag US

#### Copyright Date

January 1989

#### Language

en

#### File Format

application/pdf

Resonant Modes in Centrifugally Cast Stainless Steel (CCSS) Pipes

La Jolla, CA

Lamb-waves are the elliptically polarized resonant modes of propagation in an isotropic solid plate with free boundaries. For a given plate thickness d and an ultrasonic frequency f, there exist a finite number of such propagation modes described by the associated phase velocity. A complete description of this dispersion structure is typically given in the form of a set of dispersion curves, one for each resonant mode, showing the variation of the Lamb-wave phase velocity as a function of the product fd. In general, Lamb-wave modes can be grouped into two fundamental types: symmetric modes or antisymmetric modes, depending on whether their displacement vector is symmetric or antisymmetric with respect to the median plane of the solid plate.