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Related Concept Videos

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

322
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
322
Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

253
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...
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Hooke's Law01:26

Hooke's Law

537
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.
537
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

274
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
274
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

306
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

188
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...
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Updated: Sep 2, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Ferroelasticity in Two-Dimensional Tetragonal Materials.

Xiaoyu Xuan1, Wanlin Guo1, Zhuhua Zhang1

  • 1State Key Laboratory of Mechanics and Control of Mechanical Structures, Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Physical Review Letters
|August 8, 2022
PubMed
Summary
This summary is machine-generated.

Researchers identified 65 two-dimensional (2D) ferroelastic materials using high-throughput computations. A new descriptor accurately predicts ferroelasticity, paving the way for novel 2D multiferroic devices.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Materials Science

Background:

  • Ferroelasticity, a property analogous to ferroelectricity and ferromagnetism, involves spontaneous structural polarization but is less understood.
  • Understanding ferroelasticity in two-dimensional (2D) materials is crucial for advanced electronic and spintronic applications.

Purpose of the Study:

  • To computationally screen stable tetragonal monolayers for in-plane ferroelasticity.
  • To elucidate the underlying electronic mechanisms driving ferroelastic distortion.
  • To develop a predictive descriptor for ferroelasticity in 2D materials.

Main Methods:

  • High-throughput computation screening of 166 stable tetragonal monolayers.
  • First-principles calculations to determine material stability and properties.
  • Molecular orbital theory analysis to understand ferroelastic distortion mechanisms.

Main Results:

  • Identified 65 monolayers exhibiting in-plane ferroelasticity.
  • Established that weak M-d/X-p and M-d/M-d couplings are key to ferroelastic distortion.
  • Developed a 1D descriptor predicting ferroelasticity with 89% accuracy.
  • Discovered eleven MX compounds with coupled ferroelasticity and magnetism.

Conclusions:

  • The study provides a comprehensive list of 2D ferroelastic materials.
  • The developed descriptor offers a reliable method for predicting ferroelasticity.
  • The discovery of coupled ferroelasticity and magnetism opens avenues for 2D multiferroic materials.