Experimental and numerical investigation of the interaction of the first four SH guided wave modes with symmetric and non-symmetric discontinuities in plates

The interaction of the SH0, SH1, SH2 and SH3 guided wave modes on a metal plate with a thickness discontinuity is numerically and experimentally investigated. Two different geometries were evaluated, namely symmetric and non-symmetric discontinuities, relative to the plate longitudinal mid-plane. Experiments were performed with periodic permanent magnet array EMATs as transmitters and receivers. Mode separation in transmission and reception was...