Event Title

Nonspecular Reflection of Acoustic Beams Incident on Elastic Plates for Fluid Characterization

Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

Reflection studies of ultrasonic beams incident on elastic plates have been widely used in the area of nondestructive evaluation for the characterization of materials. There it has been found that fluid-loading of the elastic layer changes the velocity dispersion spectrum of the corresponding plate waves only to a very slight extent as long as the density of the liquid is low compared with the density of the plate material. For this reason it has been accepted that the loading is negligible in most cases. However, recent studies by Chimenti and Rokhlin [1] revealed that some regions of the total transmission spectrum of an immersed elastic layer are very sensitive to the surrounding medium even at low density ratios and it has been shown that in certain circumstances the loading can dominate the reflection behavior of the plate. This finding suggests the use of reflection experiments for the characterization of the loading fluid or even the quantitative determination of liquid properties like mass density or shear viscosity which need to be measured in chemical process control, for example.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18A

Chapter

Chapter 1: Elastic Waves and Ultrasonic Techniques

Section

Guided Waves and Applications

Pages

191-198

DOI

10.1007/978-1-4615-4791-4_23

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Nonspecular Reflection of Acoustic Beams Incident on Elastic Plates for Fluid Characterization

Snowbird, UT, USA

Reflection studies of ultrasonic beams incident on elastic plates have been widely used in the area of nondestructive evaluation for the characterization of materials. There it has been found that fluid-loading of the elastic layer changes the velocity dispersion spectrum of the corresponding plate waves only to a very slight extent as long as the density of the liquid is low compared with the density of the plate material. For this reason it has been accepted that the loading is negligible in most cases. However, recent studies by Chimenti and Rokhlin [1] revealed that some regions of the total transmission spectrum of an immersed elastic layer are very sensitive to the surrounding medium even at low density ratios and it has been shown that in certain circumstances the loading can dominate the reflection behavior of the plate. This finding suggests the use of reflection experiments for the characterization of the loading fluid or even the quantitative determination of liquid properties like mass density or shear viscosity which need to be measured in chemical process control, for example.