Wave propagation through a structured medium has attracted the attention of researchers for
centuries due to its relevance to problems in condensed matter physics, chemistry, optics …

Ultrasonic guided waves in solid media have become a critically important subject in
nondestructive testing and structural health monitoring, as new faster, more sensitive, and …

An efficient recursive algorithm, the stiffness matrix method, has been developed for wave
propagation in multilayered generally anisotropic media. This algorithm has the …

The finite element approach has been previously used, with the help of the atila code, to
model the scattering of acoustic waves by single or doubly periodic passive structures [AC …

Lamb waves are ultrasonic guided waves that propagate between two parallel free surfaces
and their use for damage detection has been widely explored and demonstrated. Damage in …

We consider the solution of the Helmholtz equation−∆ u (x)− n (x) 2ω2u (x)= f (x), x=(x, y), in
a domain Ω which is infinite in x and bounded in y. We assume that f (x) is supported in …

In this article, a method allowing vibro-acoustic and ultrasonic wave propagation analysis of
highly anisotropic textile composites at a mesoscopic level is presented for the first time. The …

An efficient and stable recursive compliance/stiffness matrix algorithm is presented to model
wave propagation in multidirectional composites. The models are applied to clarify angle …

New applications for composite materials are being developed at a rapid pace. However,
their complex microstructures present considerable challenges for nondestructive testing …

The propagation characteristics of elastic waves in general periodically multilayered media
formed by alternate arrangement of two or more arbitrarily-anisotropic materials are …