Hyperelastic tuning of one dimensional phononic band-gaps using directional stress
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In this paper we show that acoustoelasticity in hyperelastic materials can be understood using the framework of non-linear wave mixing, which, when coupled with an induced static stress, leads to a change in the phase velocity of the propagating wave with no change in frequency. By performing Floquet wave eigenvalue analysis, we also show that band-gaps for periodic composites, acting as 1D phononic crystals, can be tuned using this static stress. In the presence of second order elastic nonlinearities, the phase velocity of propagating waves in the phononic structure changes, leading to observable shifts in the band-gaps. Finally, we present numerical examples as evidence that the band-gaps are tuned by both the direction of the stress and its magnitude.
Demčenko , A , Mazilu , M , Wilson , R , Volker , A W F & Cooper , J M 2018 , ' Hyperelastic tuning of one dimensional phononic band-gaps using directional stress ' IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control , vol. 65 , no. 6 , pp. 1056-1061 . DOI: 10.1109/TUFFC.2018.2821440
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
© 2018 The Author(s). This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/.
DescriptionJMC acknowledges EPSRC Fellowship (EP/K027611/1) and the ERC advanced investigator award (340117 - Biophononics).
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