Callaghan Innovation Research Papers

Back to Research Papers

TitleHigh frequency ultrasonic wave propagation in porous aluminium
Publication TypeBook
Year of Publication2008
AuthorsDawson, A., Harris P.D., and Gouws G.
Series TitleLecture Notes in Electrical Engineering
Volume20 LNEE
Number of Pages221 - 232
ISBN18761100 (ISSN); 9783540795896 (ISBN)
KeywordsAluminium samples, aluminum, Angles of incidence, collinear microstructure, Critical angles, Finite element modeling, High frequency, Incident waveform, Lamb Wave, Microstructure, Ultrasonic propagation, Ultrasonic waves, Ultrasonics, Ultrasound system, Wave propagation, Wave propagation simulation
AbstractThe influence that microstructure has on high frequency (30-70 MHz) ultrasonic wave propagation is being investigated. In this work the ultrasound system, wave propagation simulation results and experimental results for highly structured porous aluminium samples are presented. Finite element modeling shows that a single pseudo S0 lamb wave propagates in the porous aluminium with a velocity of 5.18 km/s. Experimentally a velocity of 5.10 km/s was measured. For angled measurements the porous aluminium samples were observed to normalise the incident waveforms allowing significant energy to be transmitted beyond angles of incidence of 40°, well past the solid aluminium P and S critical angles of 14° and 29°. © 2008 Springer-Verlag Berlin Heidelberg.

Back to top