Fundamental modes of guided waves in stratified plates: appearing transverse quasi-resonances

Abstract

It has long been known that the transverse resonances may occur at propagating higher modes of guided waves in homogeneous plates. These resonances are associated with the appearing zero group velocities (ZGV) at which the flux of energy becomes orthogonal to the direction of propagation. The current research focuses on the transverse resonances found in propagating fundamental symmetric modes (S 0) in some multilayered plates. The observed phenomenon may clarify the interlayer damages and delamination at the guided wave excitation and propagation in heterogeneous structures. Cauchy sextic formalism, coupled with the exponential fundamental matrix method, is used for analyzing the transverse resonances.