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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

955
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:
955

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相关实验视频

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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

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通过机械元材料的序列不稳定性来增强能量吸收.

Adam Bekele1, M Ahmer Wadee1, Andrew T M Phillips1

  • 1Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, UK.

Royal Society open science
|August 31, 2023
PubMed
概括

这项研究介绍了一种新的机械超材料,它使用弹性不稳定性来吸收能量. 这种设计提供了高强度,其次是低度,使可重复使用和可修复的保护部件成为可能.

科学领域:

  • 机械工程 机械工程
  • 材料科学 材料科学 材料科学
  • 超材料是指一种超材料.

背景情况:

  • 理想情况下,能量吸收元件需要高负载能力和接近零的刚性,以最大限度地减少应力转移.
  • 使用物质损坏的传统方法限制了单次使用的组件.
  • 弹性不稳定性为实现所需的机械性能提供了一个无损的替代方案.

研究的目的:

  • 为了研究一个设计用于连续曲的机械超材料.
  • 为了实现能量吸收的"高强度-低刚度"特征.
  • 探索可维修和可重复使用的保护部件的潜力.

主要方法:

  • 分析建模分析建模
  • 有限元素分析的研究.
  • 实验验证实验验验证的验证

主要成果:

  • 超材料表现出了一系列的曲行为.
  • 可调节的硬度 (轴和旋转) 通过几何设计来实现.
  • 该设计成功地在弹性范围内表现出"高强度-低刚性"的特征.

结论:

关键词:
有限元分析是有限元分析.数学建模的数学建模机械超材料 机械超材料物理实验 实验 物理实验结构性的不稳定性.

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  • 利用弹性不稳定性是设计能吸收能量的组件的一个可行的方法.
  • 开发的超材料显示了可修复和可重复使用的应用的潜力.
  • 调整几何和连接属性允许控制机械反应和延迟损坏发生.