Dispersion Behaviors of Wedge Waves Propagating Along Wedges with Bilinear Cross Sections

Abstract:

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Wedge waves (WW) are guided acoustic waves propagating along the tip of a wedge, with energy tightly confined near the apex. Like Lamb waves, wedge waves with displacement field anti-symmetric about the mid-apex-plane are called anti-symmetric flexural (ASF) modes. This study is focused on exploring the dispersion behaviors of ASF modes propagating along a bilinear wedge (BW). A BW is wedge with a cross section of two apex angles, compared with a linear wedge (LW) having a single apex angle. In the literature, many studies regarding to the dispersion behaviors of ASF modes are reported for LW, but not for BW. In this study, a laser ultrasonic technique and finite element simulations are used to investigate the dispersion behavior of BW-ASF modes. It is found out that a BW-ASF mode is a result of mode coupling between the two LW-ASF modes of the same order corresponding to the two apex angles of the BW.

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi

Pages:

765-769

DOI:

10.4028/www.scientific.net/KEM.321-323.765

Citation:

C. H. Yang and C. Z. Tsen, "Dispersion Behaviors of Wedge Waves Propagating Along Wedges with Bilinear Cross Sections", Key Engineering Materials, Vols. 321-323, pp. 765-769, 2006

Online since:

October 2006

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Price:

$35.00

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