DETERMINATIONS OF ANISOTROPIC ELASTIC-CONSTANTS USING LASER-GENERATEDSURFACE-WAVES

This paper studied the recovery of elastic constants of anisotropic so lids from measured surface wave energy velocities. The calculations of surface wave phase and energy velocities of anisotropic solids were b ased on an efficient forward formalism. In the experiment, the surface waves were generated by a pulsed laser and detected by using the PS/P R technique, where the source and receiver were located on the same su rface of a specimen. The inverse problem was solved successfully by th e simplex optimization method. Following the simplex iteration rules, the orientation and the elastic constants can be recovered from the me asured surface wave energy velocities. The wave fronts and the caustic effects of the skimming shear waves have also been observed in the la ser ultrasound experiment.