TY - GEN
T1 - ULTRASONIC SIGNALS GENERATED BY A LASER SOURCE IN FILM/SUBSTRATE SYSTEMS
AU - Murray, T. W.
AU - Guo, Z.
AU - Krishnaswamy, S.
AU - Achenbach, Jan Drewes
N1 - Funding Information:
This work was carried out in the course of research sponsored by the Office of Naval Research under Contract No. N00014-89-J-1362 and the AFOSR under Contract No. F49260-98-1- 0285.
Publisher Copyright:
© 1999 ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). All rights reserved.
PY - 1999
Y1 - 1999
N2 - A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. Theoretical signals are calculated and analyzed for both a slow layer on a fast substrate and a fast layer on a slow substrate. The model has been verified experimentally using a 1 ns NdrYAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both fast on slow and slow on fast systems.
AB - A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. Theoretical signals are calculated and analyzed for both a slow layer on a fast substrate and a fast layer on a slow substrate. The model has been verified experimentally using a 1 ns NdrYAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both fast on slow and slow on fast systems.
UR - http://www.scopus.com/inward/record.url?scp=85122732474&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122732474&partnerID=8YFLogxK
U2 - 10.1115/IMECE1999-0889
DO - 10.1115/IMECE1999-0889
M3 - Conference contribution
AN - SCOPUS:85122732474
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
SP - 57
EP - 65
BT - On the Recent Advances of the Ultrasonic Nondestructive Evaluation and Composite Material Characterization
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999
Y2 - 14 November 1999 through 19 November 1999
ER -