THIS COMMUNICATION IS CANCELLED: Pure shear-waves attenuation evaluation in anisotropic materials from plane waves angular spectrum decomposition of the transmitted beam in an immersion tank

In the past decades many papers dealt with attenuation evaluation in anisotropic polycristals. Usually, authors address this problem through the analysis of a transmitted ultrasonic beam in normal incidence. Some of them proposed diffraction correction to account for the beam spreading. Nevertheless, in practice paraxial longitudinal and shear waves propagate and the measured quantity represents the overall attenuation experienced by the two kinds of waves that are comprised in the beam which propagates into the solid. In this paper, an original experimental device will be described, which allows to isolate shear waves and to evaluate their attenuation by the plane wave’s angular spectrum decomposition of the transmitted beam. Experimental results obtained on isotropic as well as on orthotropic stainless steel samples will be presented, compared and discussed.