Nonlinear Propagation of Amplitude-Modulated Ultrasonic Wave in Composite Material

Abstract:

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Some nonlinear effects in the ultrasonic wave propagation in a unidirectional carbon/carbon (C/C) composite were examined experimentally. High-power amplitude-modulated longitudinal ultrasonic waves were sent to the C/C composite sample, and the nonlinear generation of low-frequency components was observed. Due to the heterogeneity and pre-existing damage of the composite, the carrier-wave component undergoes severe attenuation, and the low-frequency components were dominant in some situations. Such low-frequency components are found to grow in a nonlinear manner, and can be a useful source of information characterizing the nonlinearity of the material.

Info:

Periodical:

Key Engineering Materials (Volumes 452-453)

Edited by:

A. Saimoto and M.H. Aliabadi

Pages:

757-760

DOI:

10.4028/www.scientific.net/KEM.452-453.757

Citation:

S. Biwa et al., "Nonlinear Propagation of Amplitude-Modulated Ultrasonic Wave in Composite Material", Key Engineering Materials, Vols. 452-453, pp. 757-760, 2011

Online since:

November 2010

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Price:

$35.00

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