Location

La Jolla ,CA

Start Date

1-1-1989 12:00 AM

Description

Numerical studies of wave propagation in free anisotropic plates were conducted at Stanford University in the early 70’s [1,2], followed by a flurry of related work. Yet, this subject has not been completely understood. Recent years, however, have seen greatly increased interests in the influence of the anisotropy of composites and textured metal plates on Lamb wave propagation characteristics. This paper presents the basic theory for the propagation of guided elastic waves in orthotropic plates. Included are both numerical results and analytical or semianalytical expressions for the generalized Rayleigh-Lamb dispersion equations. As examples, comparisons are made of the dispersion curves for isotropic, weakly orthotropic, and strongly orthotropic plates with emphasis on the behavior of the zeroth order symmetric, antisymmetric, and horizontally polarized sheer modes.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

8A

Chapter

Chapter 1: Fundamentals of Classic Techniques

Section

Elastic Wave Propagation

Pages

189-196

DOI

10.1007/978-1-4613-0817-1_24

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Propagation of Guided Elastic Waves in Orthotropic Plates

La Jolla ,CA

Numerical studies of wave propagation in free anisotropic plates were conducted at Stanford University in the early 70’s [1,2], followed by a flurry of related work. Yet, this subject has not been completely understood. Recent years, however, have seen greatly increased interests in the influence of the anisotropy of composites and textured metal plates on Lamb wave propagation characteristics. This paper presents the basic theory for the propagation of guided elastic waves in orthotropic plates. Included are both numerical results and analytical or semianalytical expressions for the generalized Rayleigh-Lamb dispersion equations. As examples, comparisons are made of the dispersion curves for isotropic, weakly orthotropic, and strongly orthotropic plates with emphasis on the behavior of the zeroth order symmetric, antisymmetric, and horizontally polarized sheer modes.