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Mixed matrix formulation for the analysis of laser-generated acoustic waves by a thermoelastic line source

โœ Scribed by Daniel Royer

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
161 KB
Volume
39
Category
Article
ISSN
0041-624X

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โœฆ Synopsis

An analytical model has been developed for the generation of bulk and surface acoustic waves at the surface of an isotropic solid by an inยฎnite thermoelastic laser line source. This model is based on the mixed matrix formulation. It leads to expressions in closed form for the longitudinal and transverse bulk displacements and also for the Rayleigh wave components. A comparison with other models shows that the mechanical eect of the free surface reduces the strength of the two dipoles of force equivalent to the point thermoelastic source. For Rayleigh waves, quantitative agreement has been found with a numerical model and with experiments previously carried out on a duraluminum plate.

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