SURFACE RESPONSE OF A FLUID-LOADED ANISOTROPIC SOLID TO AN IMPULSIVE POINT FORCE - APPLICATION TO SCANNING ACOUSTIC MICROSCOPY

An algorithm is presented for calculating the dynamic Green's function of two joined anisotropic elastic half-spaces. It is used to determin e the surface response of a, fluid loaded anisotropic solid to an impu lsive point force. Calculated images, representing the dependence of t he normal displacement on time and direction, are in good agreement wi th published images of a number of crystals obtained with a configurat ion of two point focus acoustic lenses. The images show prominent feat ures due to leaky Rayleigh and pseudosurface waves, as well as sharper lateral wave structures associated with bulk wave arrivals.