Search

Propagation of Lamb waves in elastic anisotropic plates is studied in the framework of the six-dimensional Cauchy formalism. Closed-form secular equations for dispersion curves for Lamb waves propagating in a plate with arbitrary elastic anisotropy are obtained. [ABSTRACT FROM AUTHOR]

We study numerically the propagation of Lamb waves in one-dimensional (1D) quasi-periodic composite thin plates consisting of a row of air holes embedded in the matrix material silicon according to a Cantor sequence; the surfaces of the plate are parallel to the axis of quasi-periodicity. The phenomenon of multi-splitting in the band gap structures is demonstrated. A semi-quantitative explanation is proposed in which the inherent cavity-like structure is proven to play the essential role in the phenomenon of multi-splitting, which gives a reliable way to predict where and how the band gap is splitting in the quasi-periodic systems. Possible applications are discussed. [ABSTRACT FROM AUTHOR]