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関連する概念動画

Transformation of Plane Strain01:12

Transformation of Plane Strain

193
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
193
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

250
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...
250
Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

357
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
357
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

158
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
158
Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

349
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
349
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

278
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
278

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2D素材で回転角度とストレスのプロフィールをプログラムする

Maëlle Kapfer1, Bjarke S Jessen1, Megan E Eisele1

  • 1Department of Physics, Columbia University, New York, NY, USA.

Science (New York, N.Y.)
|August 10, 2023
PubMed
まとめ
この要約は機械生成です。

研究者らは,2D素材のモアール超網を リボンを曲げて正確に制御した. この方法により,緊張と乱れが軽減され,量子応用のための調節可能なモアールパターンが可能になります.

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科学分野:

  • 材料科学
  • 凝縮物質物理学
  • ナノテクノロジー

背景:

  • モイレの超グリッドは2Dの材料で 調節可能な量子特性を提供します
  • 現在の組立方法は,回転角度を正確に制御できず,歪みを導入し,モアールパターンの品質を制限します.

研究 の 目的:

  • 2D素材におけるモアールパターンの精密な操作のための新しい技術を開発する.
  • モアール・スーパーグリットの歪み角の均一性を改善し,ストレスを軽減する.

主な方法:

  • 原子力顕微鏡の先端を使用して単層リボンを平面内折り曲げる.
  • モアールパターンを形成するために, 原子レジスタリを操作する.

主要な成果:

  • 高均一性を持つ連続した回転角の変化を達成した.
  • ランダムなストレスの有意な減少は,超低モアールパターンに導きます.
  • 調節可能なモアールパターンの波長を示した.

結論:

  • インプラン曲線は,既存の方法と比較して,モアール・スーパーラットに優れた制御を提供します.
  • このテクニックは,超低障害のモエールシステムの詳細な研究を容易にする.
  • 精密に設計された装置の開発を可能にします.