The propagation of Lamb-type waves in a nonlocal elastic plate with voids
having uniform thickness has been investigated. Using appropriate boundary
conditions, the dispersion relations corresponding to symmetric and antisymmetric
vibrations have been presented. It is found that the both symmetric and
antisymmetric families face critical frequency beyond which they cease to propagate.
For the fundamental modes, the phase speeds, the attenuation coefficients
and their mode shapes are computed numerically for a particular model.
The effect of nonlocality and void parameters on these phase speeds and
attenuation coefficients has been depicted and the results obtained are presented
graphically.
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