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Related Concept Videos

Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

216
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...
216
Hooke's Law01:26

Hooke's Law

388
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.
388
Strain-Energy Density01:20

Strain-Energy Density

410
Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
410
Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

149
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.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
149
Elastic Strain Energy for Normal Stresses01:22

Elastic Strain Energy for Normal Stresses

160
Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
If...
160
Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

719
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...
719

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Related Experiment Video

Updated: Jul 3, 2025

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Locally Strained 2D Materials: Preparation, Properties, and Applications.

Jingwei Wang1, Liqiong He1, Yunhao Zhang1

  • 1Shenzhen Geim Graphene Center, Tsinghua-Berkeley Shenzhen Institute and Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|February 10, 2024
PubMed
Summary

Localized strain in two-dimensional (2D) materials offers novel properties for advanced applications. This review explores methods, effects, and uses of locally strained 2D materials, highlighting their potential in electronics and photonics.

Keywords:
2D materialslocal strainout‐of‐plane deformationstrain engineeringstrain gradient

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Two-dimensional (2D) materials possess unique mechanical properties ideal for strain engineering.
  • Out-of-plane deformations enable the creation of non-uniform and localized strain in 2D materials.
  • Locally strained 2D materials are crucial for fundamental research and technological innovation.

Purpose of the Study:

  • To review techniques for inducing local strain in 2D materials.
  • To explore the unique phenomena and properties arising from local strain.
  • To illustrate representative applications of locally strained 2D materials.

Main Methods:

  • Discussion of various methods for introducing local strain.
  • Analysis of the feasibility, advantages, and challenges of each technique.
  • Exploration of the physical effects and resulting properties.

Main Results:

  • Identification of key techniques for local strain induction.
  • Characterization of novel phenomena and properties due to local strain.
  • Demonstration of applications in memristors, single-photon emitters, and photodetectors.

Conclusions:

  • Locally strained 2D materials present significant opportunities for future research and development.
  • Overcoming current challenges will unlock the full potential of these materials.
  • The field offers exciting prospects for next-generation electronic and photonic devices.