Longitudinal Wave Propagations and Vibrations of Sandwich Plates

Abstract

In this paper a solution is given two-dimensionally for the problem of extensional stress wave propagations and vibrations of sandwich plates. Both the sandwich core and the facings are assumed elastic and homogeneous, and the facings are identical with each other. The solution satisfies exactly the elasticity equations and the boundary conditions. Wave velocity-wavelength curves are then obtained from frequency equations for an infinite plate in plane strain. Using these results the vibrations of finite sandwich plates are also discussed. Numerical examples are given for the plates composed of aluminum and plastics.