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関連する概念動画

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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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.
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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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Dynamic Modulus of Elasticity of Concrete01:16

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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...
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The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
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組み込みインテリジェンスのためのオンデマンドバイナリローカルモジュールを持つ適応力のある機械的メタマテリアル

Richard J Nash1, Yunzheng Yang1, Yaning Li1

  • 1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, 02215, USA.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 26, 2025
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まとめ
この要約は機械生成です。

研究者は,ストレスの対応するバイナリメタカプセルを使用して,適応力のある機械メタマテリアル (AMM) を開発しました. これらの材料は瞬時に硬さを変化させ,自己最適化と適応可能な3D/4Dプリントアプリケーションを可能にします.

キーワード:
適応性のある材料アディティブ製造本体化された知性メタマテリアルオンデマンド

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科学分野:

  • 材料科学
  • 機械工学
  • ロボット

背景:

  • 生物学的な材料は 環境との相互作用によって 固有の適応性を発揮します
  • 人工的な材料は この適応性と自己最適化を 複製するのに苦労します
  • ローカルな材料の性質を動的に制御することは,重要な技術的課題です.

研究 の 目的:

  • ストレスの反応として瞬時の局所的な硬さの変化のためのメカニズムを導入する.
  • 適応力のあるメタマテリアル (AMM) の新種を開発する.
  • 自己最適化と再構成可能な人工素材を可能にします

主な方法:

  • 二重メタカプセルを設計し,2つの離散的な硬さ状態 (0と1) を設定する.
  • メタカプセルで ストレスを誘発した状態を切り替える
  • 設計指導のための計算ツールを使用します.
  • マルチマテリアルポリマージェッティングを用いたAMMの製造.
  • 機能性を検証するために機械実験 (圧縮,インデント) を行います.

主要な成果:

  • 施されたストレスを基に局所的な硬さの即時および可逆的な変化を証明した.
  • 機械的なテストでAMMの機能が確認されました.
  • 装着・卸着サイクルの後,AMMの性質を再構成する能力を示しました.

結論:

  • 開発されたAMMは局所特性を動的に調整し,製造後の再プログラミングを効果的に行うことができます.
  • 3D/4Dプリントを 適応型に変えました
  • インフィニティ-D
  • 印刷する
  • ストレス反応性メカニズムは 適応性のある人工素材を 作るための道を開きます