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


Article Preview

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.



Key Engineering Materials (Volumes 321-323)

Edited by:

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




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




[1] P. E. Lagasse, Analysis of a dispersion free guide for elastic waves, Electron. Lett. 8, 372 (1972).

[2] P. E. Lagasse, I. M. Mason, and E. A. Ash, Acoustic surface waveguides-analysis and assessment, IEEE Trans. Sonics and Ultrasonics. SU-20 (2) 143-154 (1973).

DOI: https://doi.org/10.1109/t-su.1973.29735

[3] J. McKenna, G. D. Boyd, and R. N. Thurston, Plate theory solution for guided flexural acoustic waves along the tip of a wedge, IEEE Trans. Sonics and Ultrasonics, SU-21 (3) 178-186 (1974).

DOI: https://doi.org/10.1109/t-su.1974.29812

[4] V. V. Krylov and D. F. Parker, Harmonic generation and parametric mixing in wedge acoustic waves, Wave Motion 15, 185 (1992).

DOI: https://doi.org/10.1016/0165-2125(92)90018-w

[6] J. R. Chamuel, Contactless characterization of antisymmetric edge wave dispersion along truncated wedge using electromagnetic acoustic transducer, J. Acoust. Soc. Am. 95(5), 2893 (1994).

DOI: https://doi.org/10.1121/1.409336

[7] J. R. Chamuel, Flexural edge waves along free and immersed elastic waveguides, in Review of the Progress in Quantitative Nondestructive Evaluation, Vol. 16, 129(1997).

DOI: https://doi.org/10.1007/978-1-4615-5947-4_17

[8] X. Jia and M. de Billy, Observation of the dispersion behavior of surface acoustic waves in a wedge waveguide by laser ultrasonics, Appl. Phys. Lett. 61(25), 2970 (1992).

DOI: https://doi.org/10.1063/1.108034

[9] C. -H. Yang and K. -Y. Tsai, Characterization of broadband dispersion behaviors of wedge waves with a laser ultrasound technique, Jpn. J. Appl. Phys., 43, 4392 (2004).

DOI: https://doi.org/10.1143/jjap.43.4392

[10] C. -H. Yang and J. -S. Liaw, Observation of dispersion behavior of acoustic wedge waves propagating along the tip of a circular wedge with laser ultrasonics, Jpn. J. Appl. Phys. 39(5A), 2741 (2000).

DOI: https://doi.org/10.1143/jjap.39.2741

[11] M. -F. Huang and C. -H. Yang, Application of wedge waves to the inspection of wear in machine tools, Proceeding for the International Symposium on Experimental Mechanics, Taipei, Taiwan, 154 (2002).

Fetching data from Crossref.
This may take some time to load.