The propagation of ultrasonic guided waves in viscoelastic isotropic material has been investigated. Based on the plane theory, a numerical model of the guided waves propagating is developed in the frequency domain by employing the SFEM (spectral finite element method). To verify the proposed method, thin bitumen on the steel substrate is examined and compared with the single plate in terms of ...

The wave resistance caused by a point load steadily moving on an infinitely extended viscoelastic plate floating inviscid fluid is analytically studied, which can be used to describe the response due motion of amphibious air-cushion vehicles continuous ice sheet ocean. action concentrated and distributed loads are both considered. Under assumptions that incompressible homogeneous irrotational, ...

Structural Health Monitoring (SHM) is a novel philosophy for an autonomous, built-in nondestructive evaluation of structural “health” on demand to reduce life-cycle costs, increase safety and reduce structural weight. This dissertation investigates ultrasonic guided waves, particularly Lamb waves, and their propagation properties as a method to perform Health Monitoring of viscoelastic composit...

The approximate theory of internal buckling of multilayers is obtained by a direct method and generalized to nonsinusoidal deformations. The numerical discussion includes the case of unequal thickness of competent and incompetent layers. Simple expressions are derived for the dominant wave length for rigid confinement or selfZntroduction For geological applications it is important to supplement...

The research work presented in this paper aims to optimize the dynamic response of a carbon-epoxy plate by including into laminate one frequency-dependent interleaved viscoelastic layer. To keep an acceptable bending stiffness, some holes are created layer, thus facilitating resin through layer penetration during co-curing manufacturing process. Plates (or not) perforated non-perforated) manufa...