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.
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.
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.
相关概念视频
01:16Dynamic Modulus of Elasticity of Concrete
288
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...
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...
288
01:28Standing Waves in a Cavity
894
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:
894