A thermally tunable phononic crystal

Alireza Bayat; Faramarz Gordaninejad

doi:10.1117/12.2218692

18 April 2016 A thermally tunable phononic crystal

Alireza Bayat, Faramarz Gordaninejad

Proceedings Volume 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016; 98000W (2016) https://doi.org/10.1117/12.2218692
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

A thermally tunable periodic structure is proposed and studied through analytical and finite element methods to investigate the effect of thermomechanical coupling in dynamic regime. Bimaterial ligaments composed of two strips with contrast in their thermal expansion coefficients are employed to design local resonators inside a periodic structure. The thermally induced large deformations are utilized to exploit pattern change in the structure to control elastic wave propagation. Geometric and material nonlinearities are taken into account to study the dynamic response of the deformed structure. Once the temperature gradient is removed the structure tends to return to the initial state providing opportunities to be used as thermally tunable acoustic switches and filters.

Citation Download Citation

Alireza Bayat and Faramarz Gordaninejad "A thermally tunable phononic crystal", Proc. SPIE 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016, 98000W (18 April 2016); https://doi.org/10.1117/12.2218692

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