STUDY OF SURFACE ACOUSTIC-WAVES GUIDED BY A METALLIC CYLINDRICAL WEDGE USING LASER-ULTRASONIC TECHNIQUES

It was demonstrated with laser-ultrasonic techniques that because of t he truncation which exists in actual manufactured wedges, dispersive g uided acoustic waves propagate along the tip of a straight wedge. The purpose of this paper is to report an experimental study dealing with wedge acoustic waves travelling along the tip of a free cylindrical me tallic wedge. In addition to the effect of the apex truncation, the in fluence of the surface curvature on the phase velocity dispersion is p articularly demonstrated experimentally.