title: Influence of attenuation on the behavior of refracted elastic waves at the interface between anisotropic media.
abstract: During the ultrasonic non-destructive evaluation of complex materials, like multilayer or composite materials, the behavior of the ultrasonic waves at the interface of samples is strongly dependent upon the anisotropy as well as the attenuation characteristics of the propagation media. In the generally arbitrary case, the incident wave is assumed to be inhomogeneous. Therefore the application of the Snell-Descartes laws requires to consider the real as well as the imaginary parts of all the quantities encountered during the study. In that aim, we use a representation of the complex slowness curves so-called slowness interface curves which point out the evolution of the interaction of the waves at the interface with the inhomogeneity factors, i.e. the imaginary part of the slowness vectors. The continuous distortion of the curves with the inhomogeneity factor increasing is an interesting approach of these complicated phenomena.
authors.affiliation: Departement de Physique, Faculté des Sciences de Sfax, Tunisia.
authors.forename: Morched
authors.initials: M
authors.lastname: Ben Amor
authors.forename: Bruno
authors.initials: B
authors.lastname: Rogé
authors.forename: Mohamed Hédi
authors.initials: MH
authors.lastname: Ben Ghozlen
authors.forename: Patrick
authors.initials: P
authors.lastname: Lanceleur