Computationally efficient SH-wave modeling in transversely isotropic media

Based on the description of shear horizontal (SH) wave propagation in arbit rarily oriented transversely isotropic media, radiation characteristics of ultrasonic transducers for this wave type are determined. The radiated wave fields are obtained by point source superposition, making use of an analyti cal relationship for the wave propagation direction as a function of the sp atial coordinates. Approximate formulae are given for the radiation charact eristics of circular and rectangular transducers in the far-field, which ar e in a form similar to the isotropic material case. Focusing on transversel y isotropic weld metal specimens and unidirectional composites, numerical e valuation is performed for normal-incidence probes as well as for electroma gnetic acoustic transducers.