An experimental-numerical technique for evaluating the bulk and shear dynamic moduli of viscoelastic materials
作者:
R. Lance Willis,
T. Shane Stone,
Yves H. Berthelot,
Walter M. Madigosky,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1997)
卷期:
Volume 102,
issue 6
页码: 3549-3555
ISSN:0001-4966
年代: 1997
DOI:10.1121/1.420288
出版商: Acoustical Society of America
数据来源: AIP
摘要:
An experimental/numerical technique has been implemented to determine simultaneously the bulk and shear dynamic moduli (and loss factor) of viscoelastic materials of arbitrary shape under low-frequency (0.5–2.5 kHz) harmonic excitation. The method consists of measuring the dynamic response of the sample at several points on the surface with a set of five independent laser interferometers, and matching the response with the predictions from a finite element code in which the two complex elastic moduli are the adjustable parameters. Results are presented for measurements made in air, under standard pressure and temperature conditions, and compared with predictions based on Kerner’s model.
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