Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Leaky Lamb Wave (LLW) has drawn interest from the research society for its application in the nondestructive evaluation of plate-like structures. Starting from isotropic plate[1] to plates with anisotropic materials such as fiberreinforced composites[2], the LLW problem increase complexity in a very fast manner. With the dielectric effect included in the LLW problem, a piezoelectric plate immersed in a dielectric fluid can be extended from the framework setup by the NDE LLW study. Among these studies, Nayfeh et. al.[3] investigated the influence of piezoelectricity on Lamb wave propagation. However only the mechanical effect of the fluid is treated in their study, leaving the dielectric effect with two extreme assumptions: either short-circuit or open-circuit condition. Later, Yang and Chimenti[4] modeled the piezoelectric LLW problem with fluid dielectric effect included and conducted extensive experiments[5]. The influence of the fluid conductivity on the wave propagation in a piezoelectric plate is the major interest in the current research. Theoretical modeling as well as experimental measurements are presented in this report

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16A

Chapter

Chapter 1: Standard Techniques

Section

UT Guided Waves

Pages

193-200

DOI

10.1007/978-1-4615-5947-4_25

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Acoustic Waves in a Piezoelectric Plate Immersed in a Conductive Fluid

Brunswick, ME

Leaky Lamb Wave (LLW) has drawn interest from the research society for its application in the nondestructive evaluation of plate-like structures. Starting from isotropic plate[1] to plates with anisotropic materials such as fiberreinforced composites[2], the LLW problem increase complexity in a very fast manner. With the dielectric effect included in the LLW problem, a piezoelectric plate immersed in a dielectric fluid can be extended from the framework setup by the NDE LLW study. Among these studies, Nayfeh et. al.[3] investigated the influence of piezoelectricity on Lamb wave propagation. However only the mechanical effect of the fluid is treated in their study, leaving the dielectric effect with two extreme assumptions: either short-circuit or open-circuit condition. Later, Yang and Chimenti[4] modeled the piezoelectric LLW problem with fluid dielectric effect included and conducted extensive experiments[5]. The influence of the fluid conductivity on the wave propagation in a piezoelectric plate is the major interest in the current research. Theoretical modeling as well as experimental measurements are presented in this report