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Related Concept Videos

Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

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...
Yield Criteria for Ductile Materials under Plane Stress01:25

Yield Criteria for Ductile Materials under Plane Stress

In designing structural elements and machine parts using ductile materials, it is crucial to ensure that these components withstand applied stresses without yielding. Yielding is initially determined through a tensile test, which evaluates the material's response to uniaxial stress. However, tensile stress is insufficient when components face biaxial or plane stress conditions This condition requires advanced criteria to predict failure.
The Maximum Shearing Stress Criterion, also known as the...
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.
Hooke's Law01:26

Hooke's Law

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.
Stress: General Loading Conditions01:15

Stress: General Loading Conditions

To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes.
Residual Stresses in Bending01:18

Residual Stresses in Bending

In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...

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Related Experiment Video

Updated: May 12, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
05:04

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

Published on: November 22, 2021

Subyield Dynamics in Yield-Stress Materials.

Alice Woodbridge1, Kasra Amini2, Fredrik Lundell2

  • 1The University of Manchester, Department of Physics and Astronomy and Manchester Centre for Nonlinear Dynamics, Oxford Road, Manchester M13 9PL, United Kingdom.

Physical Review Letters
|May 11, 2026
PubMed
Summary
This summary is machine-generated.

Yield-stress materials below their yield point exhibit nonlinear viscoelasticity, not flow. Experiments show bounded, periodic strain responses, challenging models that predict plastic flow or pure elasticity in this regime.

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Practical Considerations for the Design, Execution, and Interpretation of Studies Involving Whole-Bone Bending Tests of Rodent Bones
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Practical Considerations for the Design, Execution, and Interpretation of Studies Involving Whole-Bone Bending Tests of Rodent Bones

Published on: September 1, 2023

Related Experiment Videos

Last Updated: May 12, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
05:04

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

Published on: November 22, 2021

Practical Considerations for the Design, Execution, and Interpretation of Studies Involving Whole-Bone Bending Tests of Rodent Bones
04:20

Practical Considerations for the Design, Execution, and Interpretation of Studies Involving Whole-Bone Bending Tests of Rodent Bones

Published on: September 1, 2023

Area of Science:

  • Rheology
  • Materials Science
  • Soft Matter Physics

Background:

  • The mechanical response of yield-stress materials below the yield point is debated.
  • Conflicting constitutive models exist: one allows plastic flow, another assumes viscoelasticity below yield.

Purpose of the Study:

  • To investigate the subyield behavior of microgels and emulsions.
  • To determine if these materials flow or exhibit elastic behavior below the yield point.

Main Methods:

  • Parallel superposition rheometry was employed.
  • Residual slip effects were carefully accounted for.

Main Results:

  • Both microgel and emulsion samples showed bounded, periodic strain responses.
  • Compelling evidence suggests no flow occurs in the studied subyield regime.

Conclusions:

  • The subyield regime is characterized by nonlinear viscoelasticity.
  • Improved constitutive relations are needed to capture subyield nonlinearities without equating yielding to nonlinearity.