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相关概念视频

Generalized Hooke's Law01:22

Generalized Hooke's Law

811
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
811
General State of Stress01:21

General State of Stress

173
The general state of stress within a material can be accurately depicted using a stress tensor. This tensor encapsulates the internal forces distributed within a material subjected to external forces or deformations.
Specifically, consider a tetrahedral element where one face, labeled XYZ, is perpendicular to the line OA, and the remaining faces align with the coordinate axes with point O as the origin. At any point, such as point O, the stress tensor can be used to determine the stress...
173
Hooke's Law01:26

Hooke's Law

346
Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
346
Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

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A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
7.8K
Mohr's Circle for Plane Strain01:18

Mohr's Circle for Plane Strain

447
Mohr's circle is a crucial graphical method used to analyze plane strain by plotting strain on a set of cartesian coordinates, where the abscissa is normal strain ∈ and the ordinate is shear strain γ. Similarly to Mohr’s circle for plane stress, two points X and Y are plotted. Their coordinates are (∈x, -γXY) and (∈Y, γXY), respectively.
Mohr's circle visually represents the strain states under various conditions, which is essential for...
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Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

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In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
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相关实验视频

Updated: Jun 4, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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在几何驱动的超均材料中的拓机械状态.

Sungyeon Hong1, Can Nerse2, Sebastian Oberst2

  • 1School of Cybernetics, College of Engineering, Computing and Cybernetics, The Australian National University, Canberra, ACT 2601, Australia.

PNAS nexus
|December 23, 2024
PubMed
概括
此摘要是机器生成的。

无序的超均材料由于出现的拓缺陷而表现出独特的特性. 这些缺陷影响了合成和生物系统中的结构和能量定位.

关键词:
劳埃德的算法 劳埃德的算法缺陷工程是什么?缺陷工程是什么?超均性是一种超均性.拓上的缺陷 拓上的缺陷波浪的传播波浪的传播.

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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 统计力学 统计力学

背景情况:

  • 无序的超均材料具有独特的物理特性,与晶体材料不同.
  • 这些属性源于全球同otropy和局部打破的方向对称性.

研究的目的:

  • 使用动态空间分区过程生成无序的超均细胞结构.
  • 研究这些结构内的拓缺陷的出现和动态.
  • 探索弹性超均材料中的机械性能和能量定位.

主要方法:

  • 产生细胞结构的动态空间分区过程.
  • 微观缺陷动态和拓过渡的分析.
  • 弹性超均材料的振动实验和数值分析.

主要成果:

  • 在六角域内出现五角形和七角形的拓缺陷.
  • 在实现超均性过程中减少结构和观察局部偏好的动机.
  • 在弹性超均材料的缺陷周围的能量定位,与拓带间隙相关.

结论:

  • 驱动缺陷出现的动态机制是强大的,适用于各种混乱系统.
  • 这种机制影响了合成材料和生物结构.
  • 拓缺陷在无序超均材料的物理性质中起着至关重要的作用.