High frequency propagation measurements in microstructured solids

Author

Dawson, A. ; Harris, P. ; Young, R. ; Gouws, G.

Author_Institution

Ind. Res. Ltd., Lower Hutt

fYear

2008

fDate

2-5 Nov. 2008

Firstpage

74

Lastpage

77

Abstract

High frequency ultrasonic wave propagation in an immersed porous aluminium sheet is modelled and the results verified by experiment using focused broadband 50, 100 and 175 MHz waves. For colinear (pores extending from face to face of the sheet) samples the microstructure facilitates transmission at angles beyond 35deg, which is far greater than the critical angles for a homogeneous solid, and at a constant velocity.

Keywords

aluminium; high-frequency effects; porous materials; sheet materials; ultrasonic propagation; ultrasonic transmission; Al; colinear samples; focused broadband waves; frequency 100 MHz; frequency 175 MHz; frequency 50 MHz; high-frequency propagation measurement; homogeneous solid; immersed porous aluminium sheet; microstructured solids; ultrasonic transmission; ultrasonic wave propagation; Acoustic propagation; Aluminum; Circuits; Frequency measurement; Frequency response; Lighting; Microstructure; Solids; Transducers; UHF propagation; microstructure; porous; propagation;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2008. IUS 2008. IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4244-2428-3

Electronic_ISBN

978-1-4244-2480-1

Type

conf

DOI

10.1109/ULTSYM.2008.0019

Filename

4803385