Reflection study of SH0 mode with plate edge at different incident angles

Abstract

This study investigates the reflection behaviour of SH0 guided wave mode from a flat plate edge. SH0 is generated using Periodic Permanent Magnet - Electromagnetic Acoustic Transducers (PPM-EMAT) of constant wavelength (λ). Reflection characteristics of this mode are studied by varying the angle of incidence from 0° to 70°. The probes are positioned in such a way that incident and reflected angles are equal. The response of SH0 mode at the various angle of incidents is explored in terms of amplitude variation. 3D finite element model is developed to investigate reflection characteristics of SH0 mode further. The exact configuration of the PPM-EMAT has been simulated using a two-stage modelling approach. The spatially varying Lorentz force was calculated in the electrodynamic module and then applied to the elastodynamic module, and the resulting elastic disturbances are compared with experimental results.