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関連する概念動画

Impact of Groups on Groups01:19

Impact of Groups on Groups

236
Social psychologists analyze how groups influence one another, shaping social structures and interactions through both cooperation and competition. These dynamics manifest in various ways, ranging from economic partnerships to intergroup conflicts that shape societal structures and perceptions.Cooperation and Competition in Intergroup RelationsIntergroup relationships vary across contexts, sometimes fostering cooperation and mutual benefit while at other times leading to conflict and...
236
Resistivity01:22

Resistivity

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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Resistance01:19

Resistance

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When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
5.7K
Impact01:30

Impact

483
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
483
Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

381
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
381
Genetic Material01:20

Genetic Material

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Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
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Updated: Jan 22, 2026

Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
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衝撃に抵抗するナクレのような透明な材料

Z Yin1, F Hannard1, F Barthelat2

  • 1Department of Mechanical Engineering, McGill University, Montreal, Quebec H3A 2K6, Canada.

Science (New York, N.Y.)
|June 29, 2019
PubMed
まとめ

研究者は"レンガとモルタル"の構造を用いて,ナクレアにインスパイアされた新しいガラスを開発しました. この革新的な素材は 衝撃抵抗性と頑丈性を大幅に高め 強い耐久性のあるガラスを生み出すために 自然のモルスクの殻を真似ています

科学分野:

  • 材料科学
  • バイオミメティック
  • 構造工学

背景:

  • 伝統的なガラスには優れた光学特性がありますが,脆さや低耐震性があり,その使用を制限しています.
  • ラミネーションやテンプリングのような既存の方法は 衝撃反応を良くしますが 固有の脆さには対応できません
  • ナチュラルナークル (真珠の母) は,ユニークな3Dの"レンガとモルタル"構造と"タブレット・スライディング・メカニズム"により,例外的な頑丈さを提供します.

研究 の 目的:

  • 自然なナクレアの構造を 複製する新しいバイオインスピレーションの レイミネートガラスを設計する
  • "タブレットスライディングメカニズム"を組み込むことでガラスの頑丈さと耐震性を高める.
  • 要求の高い用途に適した高性能ガラス材料を作成します.

主な方法:

  • 透明な熱プラスチックのエラストマーインターレイヤを使用した 3D "レンガとモルタル"アーキテクチャを設計しました.
  • 自然なナクレの階層構造と"タブレットスライディングメカニズム"を模倣した.
  • 粘り強さ,硬さ,衝撃耐性をテストした.

主要な成果:

  • バイオインスピレーションのガラスは"タブレットスライディングメカニズム"を成功裏に再現し,大規模な非線形変形を可能にしました.

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関連する実験動画

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Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition
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Study of a Dot-patterning Process on Flexible Materials using Impact Print-Type Hot Embossing Technology
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Study of a Dot-patterning Process on Flexible Materials using Impact Print-Type Hot Embossing Technology

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  • 従来のラミネートガラスとテンプレートガラスの2〜3倍の耐震性を得ています.
  • 伝統的なガラスと比べて高い強度と硬さを維持しています.

    • 結論:

    • ガラスの脆さを克服する非常に効果的な バイオミメティックなアプローチを示しています
    • "タブレット・スライディング・メカニズム"は,優れたタフさと衝撃耐性を達成する上で重要な要素です.
    • この新しい材料は,より強く安全なガラス製品を開発するための有望な経路を提供します.