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Related Concept Videos

Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

213
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...
213
Transformation of Plane Strain01:12

Transformation of Plane Strain

159
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...
159
Strain Energy01:13

Strain Energy

406
Strain energy is a fundamental concept in the field of materials science and structural engineering, describing the energy absorbed by a material or structure when it is deformed under load.
Consider a rod that is fixed at one end and subjected to an axial force at the free end. This axial force induces stress within the rod, leading to its elongation. As the axial force increases, so does the elongation of the rod, illustrating a direct relationship between the force applied and the resulting...
406
Measurements of Strain01:27

Measurements of Strain

704
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
704
True Stress and True Strain01:28

True Stress and True Strain

295
Engineering stress is calculated as the load divided by the original, undeformed cross-sectional area. It approximates a material under load. This approximation is especially relevant post-yield in ductile materials. Though engineering stress-strain diagrams are often used for their convenience and accessibility, they can sometimes fall short in accuracy, particularly when dealing with large strain values.
In contrast, true stress offers a more precise portrayal. It is computed by dividing the...
295
Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

702
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
702

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Related Experiment Video

Updated: Jun 25, 2025

Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
09:35

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Manipulating 2D Materials through Strain Engineering.

Xiangxiang Yu1,2, Zhuiri Peng1, Langlang Xu1

  • 1School of Integrated Circuits, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.

Small (Weinheim an Der Bergstrasse, Germany)
|May 31, 2024
PubMed
Summary
This summary is machine-generated.

Strain engineering in 2D materials like graphene and TMDs offers tunable properties. This review details methods and impacts on electronic, optical, and magnetic characteristics for advanced devices.

Keywords:
2D materialsdevice performanceexperimental and theoretical resultsstrain engineering

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • 2D layered materials (graphene, h-BN, TMDs, BP) exhibit unique properties.
  • Strain engineering is a key method for tuning these properties.

Purpose of the Study:

  • To review recent advances in strain engineering of 2D materials.
  • To explore the impact of strain on various physical properties.
  • To discuss applications and challenges in functional devices.

Main Methods:

  • Experimental and theoretical investigations of strain effects.
  • Summarization of diverse strain engineering techniques.
  • Analysis of property modulation (electrical, optical, magnetic, thermal, valleytronic).

Main Results:

  • Strain significantly alters electrical, optical, magnetic, thermal, and valleytronic properties.
  • Strain engineering enhances the performance of 2D material-based devices.
  • Diverse methods exist for applying and controlling strain.

Conclusions:

  • Strain engineering is a powerful tool for tailoring 2D material functionalities.
  • Potential applications span optoelectronics, thermionics, and spintronics.
  • Further research is needed to overcome challenges in device integration.