Piezoelectric Effect on the Buckling of Piezoelectric Thin Film with Viscoelastic Substrate

Abstract

AbstractThis work aims to study the buckling kinetic process of a piezoelectric thin film (nanoribbon) bonded to a viscoelastic compliant layer with rigid support. The piezoelectric thin film is assumed to be poled in the thickness direction and is governed by the nonlinear coupled electromechanical equations. Subsequently, on the basis of the classical elastic-viscoelastic correspondence principle, the kinetic process of the thin film buckling under the intermediate stress state is analyzed in a systematic manner. In particular the piezoelectric effect is examined with respect to the critical wavelength, the wavelength of the fastest growing mode, the critical stress, and the fastest growth rate in detail. The results evince that the piezoelectricity has an evident stiffening effect on the kinetic buckling process of the thin film with viscoelastic substrate.