IMI Interdisciplinary Mathematics InstituteCollege of Arts and Sciences

Linear and Nonlinear Waves Formed in Granular Crystals and Their Engineering Applications

  • Oct. 9, 2012
  • 2:30 p.m.
  • LeConte 312

Abstract

Granular crystals are composed of ordered elastic particles in periodic architectures, which exhibit remarkable versatility in their acoustic spectra from linear to highly nonlinear regimes. Dr. Yang’s research focus resides in the development of tunable and lightweight structural materials based on granular crystals to identify external impacts and mitigate noise and vibration in a selected range of frequencies. These novel acoustic structures are feasible by exploiting dispersion and nonlinearity effects resulting from the close interplay among granular particles. Such material systems could be used for several engineering applications, including self-sensing and protective structures and tunable acoustic filtering devices. Dr. Yang is also interested in the design of new sensor and actuator instruments based on nonlinear solitary waves in granular crystals. Preliminary studies show that these sensors can successfully characterize bone mechanical properties for biomedical applications and detect hidden delaminations and cracks in military structures for aerospace applications. These novel sensor devices may offer a new perspective beyond the conventional linear-wave based structural health monitoring and nondestructive evaluation schemes.

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