Ultrasonic signals generated by a laser source in film/substrate systems

T. W. Murray*, Z. Guo, Sridhar Krishnaswamy, Jan Drewes Achenbach

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A model for the pulsed laser generation of ultrasound in an isotropic film n 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 Nd:YAG 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.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
PublisherASME
Pages57-65
Number of pages9
ISBN (Print)0791816516
StatePublished - Dec 1 1999
EventOn The Recent Advances of the Ultrasonic Nondestructive Evaluation and Composite Material Characterization - 1999 (The ASME International Mechanical Engineering Congress and Exposition) - Nashville, TN, USA
Duration: Nov 14 1999Nov 19 1999

Publication series

NameAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD
Volume234
ISSN (Print)0160-8835

Other

OtherOn The Recent Advances of the Ultrasonic Nondestructive Evaluation and Composite Material Characterization - 1999 (The ASME International Mechanical Engineering Congress and Exposition)
CityNashville, TN, USA
Period11/14/9911/19/99

ASJC Scopus subject areas

  • Mechanical Engineering

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