✦ LIBER ✦

AN EXPERIMENTAL STUDY OF THE ANGULAR DEPENDENCE OF LAMB WAVE EXCITATION AMPLITUDES

✍ Scribed by J.J. Ditri; K. Rajana

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 252 KB
Volume: 204
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1997.0976

No coin nor oath required. For personal study only.

✦ Synopsis

The generation of Lamb waves in isotropic layers by phase matching of an obliquely incident, bounded beam is examined experimentally, and the results compared to theoretical predictions obtained from a simplified model of the process. It is demonstrated experimentally that the range of incident angles over which any given mode can be generated is dependent upon the size of the transducer used to excite the mode, its frequency content and the pressure distribution across its surface. Experimentally obtained excitation amplitude versus incident angle curves are given for various Lamb wave modes and transducers of different sizes and vibrational characteristics. These experimental amplitudes are compared to theoretical curves based on a simplified model of the generation process.

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