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関連する概念動画

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

303
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...
303
Mechanical Characteristics of Steel01:18

Mechanical Characteristics of Steel

926
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
926
Plastic Deformations01:19

Plastic Deformations

339
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...
339
Plastic Deformations01:14

Plastic Deformations

317
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...
317
Steel Fastening Techniques01:17

Steel Fastening Techniques

1.1K
Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
1.1K
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

378
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...
378

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関連する実験動画

Updated: Dec 12, 2025

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
10:24

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

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髪の毛 が 鉄 を 変形 する 方法

Gianluca Roscioli1, Seyedeh Mohadeseh Taheri-Mousavi1,2, Cemal Cem Tasan3

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.

Science (New York, N.Y.)
|August 9, 2020
PubMed
まとめ
この要約は機械生成です。

硬い鋼は,複雑な相互作用により,柔らかい材料を切るときに失敗します. ラットマーテンサイト構造の空間的変動は,混合モードのクラッキングを引き起こし,重要な磨きが起こる前にツールが故障する.

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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

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Fabrication of 3D Carbon Microelectromechanical Systems C-MEMS
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Fabrication of 3D Carbon Microelectromechanical Systems C-MEMS

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関連する実験動画

Last Updated: Dec 12, 2025

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars
10:24

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

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科学分野:

  • 材料科学
  • トリボロジー
  • 金属工学

背景:

  • マルテンシート微細構造,高炭化物含有量,コーティングの鋼は硬さと耐磨性のために設計されています.
  • 毛やチーズやジャガイモのような 柔らかい材料を切るときに これらのツール・スチールは失敗します 機械的な理解が欠けている日常的な観察です
  • 材料と変形条件の複雑な相互作用は,故障マイクロメカニズムの理解を妨げています.

研究 の 目的:

  • より柔らかい材料を切る際に硬化鋼の故障の原因となる微細なメカニズムを解明する.
  • 観測された材料の故障におけるマルテンサイト微細構造の役割を調査する.
  • 工具鋼の切断から磨きへの移行を理解する.

主な方法:

  • 断絶した切断試験は,専門のマイクロメカニカルテストセットアップを使用して行われました.
  • 電子顕微鏡を用いて,微小スケールでの変形と断裂の過程を観察した.
  • 実験的発見を補完するために,分析的および数学的調査が行われました.

主要な成果:

  • ラットマーテンサイト構造内の空間的変動は,材料の故障の重要な要因として特定されました.
  • 混合モードII-IIIのクラッキング現象が観察されました.
  • この破裂は,材料の著しい磨きが始まる前に発生し,早めの故障を説明します.

結論:

  • ラット・マーテンサイトの微細構造的異質性は,ソフトな材料を切るツール・スチールにおける過早な故障の主な原因である.
  • このミックスモードのクラッキングメカニズムを理解することは,より堅固な切削工具の設計に不可欠です.
  • マイクロ構造と性質の関係に関するさらなる研究は,ツールの性能と長寿を高めることができます.