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Characterization of Fiber-Waviness in Composite Specimens Using Deep Line-Focus Acoustic Microscopy

Published

Author(s)

W Sachse, D Xiang, Nelson N. Hsu, K Y. Kim

Abstract

A broadband lensless, line-focus transducer possessing a large aperture and low f-number can be used to generate leaky surface waves in a specimen. It is a critical element in an ultrasonic microscope which is operated in a time-resolved mode and whose utility has already been demonstrated in several materials characterization applications. We show in this paper how such a system when it is scanned over a wavy composite specimen can be used to characterize this material. We present results which are obtained when the focus of the transducer is near the front surface of the specimen. But further, we show that when the transducer is focused on a region deep inside a specimen, the variations of the microstructure of a wavy composite specimen can be clearly imaged.
Citation
Materials Science Center Report #8236
Volume
VII ed.

Keywords

Acoustic microscopy, Line-focus Microscopy, Ultrasonics

Citation

Sachse, W. , Xiang, D. , Hsu, N. and Kim, K. (1997), Characterization of Fiber-Waviness in Composite Specimens Using Deep Line-Focus Acoustic Microscopy, Materials Science Center Report #8236 (Accessed April 17, 2024)
Created December 31, 1996, Updated October 12, 2021