{ital V}({ital z}) measurement of multiple leaky wave velocities for elastic constant determination

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/1.416033· OSTI ID:286915

Li, W; Achenbach, J D ^[1]

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1. Center for Quality Engineering and Failure Prevention, Northwestern University, Evanston, Illinois 60208 (United States)

A multiple leaky acoustic wave method to determine elastic constants from a single {ital V}({ital z}) measurement is presented. The {ital V}({ital z}) curves which include contributions from different leaky acoustic waves, measured using the line-focus acoustic microscope at 225 MHz, have been compared with theoretical results predicted by a {ital V}({ital z}) measurement model. The determination of elastic constants has been achieved numerically by seeking a set of elastic constants that leads to the best fit, in the least square sense, of the theoretical results to the experimental ones. The method has been applied to isotropic materials in bulk, and plate and thin-film configurations. Elastic constants for each of these cases have been determined. The consistency, convergence, sensitivity, and accuracy of the procedure have been investigated. {copyright} {ital 1996 Acoustical Society of America.}

• DOE Contract Number: FG02-86ER13484
• OSTI ID: 286915
• Journal Information: Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 3 Vol. 100; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ACOUSTIC MICROSCOPY
ELASTICITY
FOCUSING
LEAK TESTING
MHZ RANGE 100-1000
PLATES
SOLIDS
THIN FILMS