ACOUSTIC TECHNIQUE APPLIED TO THE MEASUREMENT OF THE FREE-EDGE WAVE VELOCITY

In this paper, the influence is examined of the apex angle on the velo city of the acoustic edge waves propagating in free linear elastic wed ges. The guided antisymmetric waves (ASF modes) are generated and dete cted with a technique which uses two shear transducers, the directions of polarization of which are perpendicular to the bisecting plane of the wedge. This method, suggested by Pajewski, is analysed and discuss ed. The experimental measurements of the variation of the free edge wa ve velocity with respect to the apex angle reveal a very good agreemen t with the theoretical computations.