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Proceedings Paper

Anti-symmetric flexural modes propagating along a wedge tip with a defect
Author(s): Tai-Chieh Wu; Yu-Hong Chen; Che-Hua Yang
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Paper Abstract

Antisymmetric flexural (ASF) modes are guided acoustic waves propagating along a wedge-shaped wave guide with their energy tightly confined near the tip. Motivated by the potential application of employing ASF modes in inspecting defects in machine tool blades with sharp edges, this study is focused in investigating the behaviors of ASF modes propagating along the wedge tips with defect. More specifically, we investigate the quantitative behaviors of ASF reflection and transmission while the ASF modes interact with a defect along a wedge tip. This investigation includes numerical simulations with finite element analysis and experimental measurements with a laser ultrasound technique. Defect parameters including depth and width are discussed regarding to their influences on the reflection coefficient (RC) and transmission coefficient (TC). The RC is found to increase as the ratio between the defect depth and the ASF wavelength increases, while the TC decreases.

Paper Details

Date Published: 5 April 2012
PDF: 6 pages
Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 834719 (5 April 2012); doi: 10.1117/12.917423
Show Author Affiliations
Tai-Chieh Wu, National Taipei Univ. of Technology (Taiwan)
Yu-Hong Chen, National Taipei Univ. of Technology (Taiwan)
Che-Hua Yang, National Taipei Univ. of Technology (Taiwan)


Published in SPIE Proceedings Vol. 8347:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012
Andrew L. Gyekenyesi, Editor(s)

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