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相关概念视频

Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

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The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
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Standing Waves in a Cavity01:28

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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在弹性和声学超材料科学科学当前的发展.

Giuseppe Failla1, Alessandro Marzani2, Antonio Palermo2

  • 1Department of Civil, Energy, Environmental and Materials Engineering (DICEAM), University of Reggio Calabria, Via Zehender, Reggio Calabria 89124, Italy.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
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概括

超材料是具有独特性质的工程材料. 这项研究探讨了对弹性和声学超材料的尖端理论,计算和实验研究,突出了最近的成就和未来的挑战.

关键词:
声学 声学 声学 声学计算建模计算建模设计 设计 设计 设计弹性动力学 弹性动力学超材料是一种金属材料.控制波浪的控制波浪的控制.

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科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 工程 工程师 工程师 工程师

背景情况:

  • 超材料代表了一个新的科学前沿,具有超越自然材料的工程性质.
  • 它们的独特特征源于各种规模的精心设计的建筑.
  • 机械和声学领域的应用正在迅速扩大.

研究的目的:

  • 编制关于弹性和声学超材料的当前理论,计算和实验研究.
  • 为最近的进展提供全面的概述.
  • 确定该领域未来的研究挑战.

主要方法:

  • 理论研究理论研究.
  • 计算建模计算建模
  • 实验调查是实验性的研究.

主要成果:

  • 在工程材料中展示异国情调的特性.
  • 量身定制的架构使新的机械和声学功能成为可能.
  • 在理解和应用元材料方面取得了重大进展.

结论:

  • 弹性和声学超材料为创新提供了巨大的潜力.
  • 持续的跨学科研究对于未来的突破至关重要.
  • 这个主题号捕捉到了超物质科学的动态状态.