COMPARISON OF THE MATRIX TECHNIQUES FOR MODELING STRESS WAVES IN MULTILAYERED MEDIA

This paper describes the development of a general purpose model for wave prop-agation in Cartesian system. When isotropic materials are used, the model can account for elastic and visco-elastic isotropic materials, single or multi-layered struc-tures, and free or leaky systems. Model determines what resonances can exist in order to satisfy the boundary conditions and the bulk wave propagation character-istics in each of the layers. These resonances control how ultrasonic waves will be guided in the system and what properties each of these waves will have. Key words: guided waves, dispersive curves