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関連する概念動画

Plastic Behavior01:21

Plastic Behavior

A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
Plastic Deformations01:14

Plastic Deformations

It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
Plastic Deformations01:19

Plastic Deformations

Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their original...
Irrotational Flow01:28

Irrotational Flow

Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:

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関連する実験動画

Updated: May 13, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

粘性プラスチックの変形における断続的な脱位流.

M C Miguel1, A Vespignani, S Zapperi

  • 1The Abdus Salam International Centre for Theoretical Physics, PO Box 586, 34100 Trieste, Italy. carmen@ffn.ub.es

Nature
|April 5, 2001
PubMed
まとめ
この要約は機械生成です。

結晶性物質の変位は,粘性プラスチックの変形の間にスケールフリーな断続的な動きを示します. ストレス下にある氷で観察されたこの発見は,標準モデルを超えた可塑性の一般的なダイナミックなイメージを明らかにします.

さらに関連する動画

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces
07:12

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces

Published on: July 8, 2025

関連する実験動画

Last Updated: May 13, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces
07:12

Applying Permanent, Robust Stenciled Patterns of Fine Particles to Elastomeric Surfaces

Published on: July 8, 2025

科学分野:

  • マテリアルサイエンス 材料科学
  • 凝縮物質物理学 凝縮物質物理学
  • 固体力学 固体力学とは

背景:

  • 結晶性物質における粘性プラスチックの変形 (クリープ) は,相互作用する変位の集団的運動によって引き起こされます.
  • 以前の研究では,パターニングと構成法則の分析方法と変位ダイナミクスのシミュレーションを使用した.
  • 以前は,相互作用する変位ダイナミクスの統計的分析が欠けていました.

研究 の 目的:

  • 相互作用する変位ダイナミクスの統計分析を行う.
  • 粘性プラスチックの変形時の変位運動の性質を調査する.
  • 柔軟性を理解するためのより包括的な枠組みを開発する.

主な方法:

  • ストレス下にある単一結晶の氷の音響放射測定.
  • 相互作用する変位のモデルの数値シミュレーション.
  • 変位動態の統計分析. 変位動態の統計分析.

主要な成果:

  • 脱位運動は,スケールフリーで断続的であることが判明しました.
  • 数値シミュレーションにより,実験観察が成功裏に再現されました.
  • 迅速な集団的再編成を伴う構成の風景が特定されました.

結論:

  • 粘性プラスチックの変形における脱位ダイナミクスは,集合的再配置による断続的な行動を示します.
  • このダイナミックなイメージは,様々な結晶材料に共通している可能性が高い.
  • この発見は,平均フィールドのアプローチを超えた可塑性のための新しい枠組みを提供します.