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相关概念视频

Three-Dimensional Force System01:30

Three-Dimensional Force System

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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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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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Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
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Generalized Hooke's Law01:22

Generalized Hooke's Law

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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...
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Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

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Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
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Hooke's Law01:26

Hooke's Law

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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.
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接近同位素,极度刚性,连续的3D机械元材料序列使用隐式神经表示.

Yunkai Zhao1, Lili Wang1, Xiaoya Zhai1

  • 1Department of Mathematical Sciences, University of Science and Technology of China, Hefei, Anhui, 230026, China.

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研究人员使用拓优化和数据驱动设计开发了具有极度刚性的连续机械元材料序列. 这些新型材料在广泛的密度范围内实现了近乎理论性的性能,克服了以前的限制.

关键词:
极端的硬度极端的硬度隐含的神经表现隐含的神经表现同位型的元材料.的元材料序列.

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科学领域:

  • 材料科学与工程 材料科学与工程
  • 机械工程 机械工程
  • 计算设计的计算设计.

背景情况:

  • 机械超材料通过量身定制的密度分布提供独特的特性.
  • 设计连续序列,在所有方向上都接近理论极限的刚性是具有挑战性的.
  • 现有的设计往往无法在中高相对密度下保持高性能.

研究的目的:

  • 提出新的,连续的3D机械元材料序列,具有接近同位素的和极端的刚性.
  • 为了在广泛的密度范围 (0.2-1) 中实现接近理论极限的性能.
  • 使用隐式神经函数,为不断变化的密度引入无分辨率表示.

主要方法:

  • 结合拓优化与数据驱动的设计方法.
  • 开发了三种不同的近同otropic,极度刚性的元材料序列.
  • 利用隐式神经函数用于连续密度表示.

主要成果:

  • 在最不利的方向实现了超过98%的哈辛-施特里克曼上界.
  • 在0.2-1的相对密度范围内表现出高性能,优于之前的设计.
  • 实验验证证了拟议序列的可制造性和高刚性.

结论:

  • 提出的方法成功地产生了具有异常刚性的连续机械元材料序列.
  • 隐式神经函数使无分辨率,不断变化的密度用于先进的元材料设计.
  • 这些发现推动了高性能机械超材料的设计和应用.