Hyperelastic Tuning of One-Dimensional Phononic Band Gaps Using Directional Stress.
Hyperelastic Tuning of One-Dimensional Phononic Band Gaps Using Directional Stress.
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使用方向应力对一维声子带隙进行超弹性调谐。
DOI：
10.1109/tuffc.2018.2821440
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Demcenko A
中科院分区：
文献类型：
--
作者：
Demcenko A
在本文中，我们表明，超弹性材料中的声弹性可以理解使用的框架，非线性波混频，其中，当耦合与诱导的静态应力，导致传播波的相速度的变化，而不改变频率。通过执行Floquet波本征值分析，我们还表明，作为1-D声子晶体的周期性复合材料的带隙，可以调整使用此静态应力。在二阶弹性非线性的存在下，声子结构中传播波的相速度发生变化，导致带隙中可观察到的位移。最后，我们提出的数值例子作为证据，带隙调谐的方向的应力和它的大小。
In this paper, we show that acoustoelasticity in hyperelastic materials can be understood using the framework of nonlinear 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 1-D 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.