In this work, we discuss a strategy for spatial and modal wave manipulation in granular phononic crystals based on the use of nonlinearity as a trigger to reversibly activate different combinations of wave modes in the crystals response. Our approach revolves around the concept of modal mixing, whereby, through the generation of higher harmonics in crystals with complex modal structures, we can induce jumps in the response across the available propagation modes; as a result, the system experiences a blend of modes and the simultaneous activation of complementary functionalities. To demonstrate the versatility of this approach, we numerically study a family of dimer granular crystal configurations featuring a variety of wave control functionalities. This approach based on modal mixing features the ability to yield a wide variety of functional configurations without changes in the shape, size or topology of the nonlinear phononic crystal.
|Original language||English (US)|
|Number of pages||4|
|State||Published - 2015|
|Event||ICU International Congress on Ultrasonics, ICU 2015 - Metz, France|
Duration: May 11 2015 → May 14 2015
Bibliographical noteFunding Information:
The authors acknowledge the support of the National Science Foundation CAREER Award (CMMI-1452488).
- Granular Metamaterials
- Mode Hopping