Decoupling Nonclassical Nonlinear Behavior of Elastic Wave Types.
Decoupling Nonclassical Nonlinear Behavior of Elastic Wave Types.
复制标题
解耦弹性波类型的非经典非线性行为。
DOI：
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发表时间：
2016
影响因子：
8.6
通讯作者：
T. Ulrich
中科院分区：
文献类型：
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作者：
M. Remillieux;Robert A. Guyer;Robert A. Guyer;C. Payan;T. Ulrich
在这封信中，张量性质的非线性介观弹性材料的非平衡动力学是通过多模共振实验证明。在这些实验中，当样品以纯纵向或纯扭转模式振动时，仔细监测动态响应，包括速度和应变的空间变化。通过类比的事实，这样的实验可以解耦的线弹性张量的元素，我们证明了量化的材料的非平衡动力学的参数有很大的不同的压缩波和剪切波。这一结果可能会导致进一步理解的非线性力学现象，出现在自然系统中，以及非线性声学超材料的设计和工程。
In this Letter, the tensorial nature of the nonequilibrium dynamics in nonlinear mesoscopic elastic materials is evidenced via multimode resonance experiments. In these experiments the dynamic response, including the spatial variations of velocities and strains, is carefully monitored while the sample is vibrated in a purely longitudinal or a purely torsional mode. By analogy with the fact that such experiments can decouple the elements of the linear elastic tensor, we demonstrate that the parameters quantifying the nonequilibrium dynamics of the material differ substantially for a compressional wave and for a shear wave. This result could lead to further understanding of the nonlinear mechanical phenomena that arise in natural systems as well as to the design and engineering of nonlinear acoustic metamaterials.