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Soft silicone rubber in phononic structures: Correct elastic moduli

机译:声子结构中的软硅橡胶:正确的弹性模量

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摘要

We report on a combination of experiments to determine the elastic moduli of a soft poly (dimethylsiloxane) rubber that was utilized in a smart experiment on resonant phononic modes [Liu et al., Science 289, 1734 (2000)] and whose reported moduli became widely used as a model system in theoretical calculations of phononic materials. We found that the most peculiar hallmark of these values, an extremely low longitudinal sound velocity, is not supported by our experiments. Anyhow, performing theoretical band structure calculations, we can reproduce the surprising experimental findings of Liu et al. even utilizing the correct mechanical parameters. Thus, the physical conclusions derived in the theoretical works do not require the use of an extremely low longitudinal velocity, but can be reproduced assuming only a low value of the shear modulus, in agreement with our experiments.
机译:我们报告了确定软聚二甲基硅氧烷橡胶的弹性模量的实验组合,该弹性模量用于共振声子模式的智能实验[Liu等,Science 289,1734(2000)],其报告的模量变为在声子材料的理论计算中被广泛用作模型系统。我们发现,这些值中最奇特的标志,即极低的纵向声速,并未得到我们的实验支持。无论如何,进行理论上的能带结构计算,我们可以重现刘等人的令人惊讶的实验发现。甚至利用正确的机械参数。因此,在理论工作中得出的物理结论不需要使用极低的纵向速度,而是可以在假定剪切模量值较低的情况下进行再现,这与我们的实验一致。

著录项

  • 来源
    《Physical review》 |2013年第9期|094102.1-094102.4|共4页
  • 作者单位

    Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany,Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA;

    Institut d'Electronique de Microelectronique et de Nanotechnologie UMR CNRS 8520, Universite de Lille 1, Sciences et Technologies,59652 Villeneuve d'Ascq, France;

    Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany;

    Department of Materials Science & Technology, University of Crete and F.O.R.T.H./IESL, P.O. Box 1527, 71110 Heraklion, Greece;

    lnstitut d'Electronique de Microelectronique et de Nanotechnologie UMR CNRS 8520, Universite de Lille 1, Sciences et Technologies,59652 Villeneuve d'Ascq, France;

    Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany,Department of Materials Science & Technology, University of Crete and F.O.R.T.H./IESL, P.O. Box 1527, 71110 Heraklion, Greece;

    Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kawloon, Hong Kong, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    structural acoustics and vibration; localized modes;

    机译:结构声学和振动;本地化模式;

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