Scholte-Stoneley waves on an immersed solid dihedral: generation, propagation and scattering effects.

Scholte-Stoneley wave propagation on a dihedral and more precisely the diffraction effects occurring at the corners, has since long been of high importance for nondestructive testing of materials and structures. Experimental investigations have been reported in the past. Simulations based on radiation mode theory have been published before, explaining the only situation for which the model is applicable namely rectangular corners. The current report describes an investigation applying finite element simulations. Results are obtained not only for rectangular corners but for any possible corner angle. The outcome is in agreement with reported experiments. Moreover a critical corner angle is found below and beyond which different diffraction phenomena occur. The study is performed for different isotropic solids.