The phononic band structures of two-dimensional solid phononic crystals with different lattice and scatterer symmetry are studied numerically, with three types of lattice (square, triangular and rectangular) and four different scatterer shapes (circle, hexagon, square and rectangle) considered. XY and Z vibration modes are investigated separately. Two types of phononic crystal are considered: o...

We demonstrate experimentally the manipulation of Lamb waves guided along reconfigurable phononic circuits created by defects composed threaded rods held with nuts in a perforated solid crystal slab. Adjusting free length rod, resonant frequency defect can be tuned, without any change supporting Both straight and bent waveguides are fabricated measured an aluminum sample lattice constant 20 mm ...

Three dimensional phononic crystal ("sonic vacuum" without prestress) was assembled from 137 vertical cavities arranged in hexagonal pattern in Silicone matrix filled with stainless steel spheres. This system has unique strongly nonlinear properties with respect to wave propagation inherited from nonlinear Hertz type elastic contact interaction. Trains of strongly nonlinear solitary waves excit...