Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

284
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
284
Shearing Stress01:19

Shearing Stress

541
Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
541
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

182
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...
182
Shearing Strain01:20

Shearing Strain

252
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
252
Problem Solving on Stress and Strain01:22

Problem Solving on Stress and Strain

725
Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
725
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

644
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
644

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

FORWARD: Dataset of a forwarder operating in rough terrain.

Data in brief·2026
Same author

Female cancer incidence before and after diagnosis of primary Sjögren's disease: A retrospective cohort study.

Journal of translational autoimmunity·2026
Same author

A proteomic profile correlates with salivary gland inflammation and disease-associated antibodies in Sjögren's disease.

Annals of the rheumatic diseases·2025
Same author

Landscape and Climate-Associated Selection in the Native and Widespread Bumblebee, Bombus terrestris.

Molecular ecology·2025
Same author

2023 International Rome consensus for the nomenclature of Sjögren disease.

Nature reviews. Rheumatology·2025
Same author

Variants in the DDX6-CXCR5 autoimmune disease risk locus influence the regulatory network in immune cells and salivary gland.

Annals of the rheumatic diseases·2025

Related Experiment Video

Updated: Jun 20, 2025

Characterizing Single-Molecule Conformational Changes Under Shear Flow with Fluorescence Microscopy
08:47

Characterizing Single-Molecule Conformational Changes Under Shear Flow with Fluorescence Microscopy

Published on: January 25, 2020

5.8K

Considerations on the relaxation time in shear-driven jamming.

Lucas Hedström1, Peter Olsson1

  • 1Department of Physics, <a href="https://ror.org/05kb8h459">Umeå University</a>, 901 87 Umeå, Sweden.

Physical Review. E
|July 18, 2024
PubMed
Summary

We investigated the jamming transition in elastic particles under shear, focusing on relaxation time. Pressure correlations were found to be longer-lived than relaxation time correlations, impacting critical exponent determination.

More Related Videos

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

12.6K
Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
07:07

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

31.7K

Related Experiment Videos

Last Updated: Jun 20, 2025

Characterizing Single-Molecule Conformational Changes Under Shear Flow with Fluorescence Microscopy
08:47

Characterizing Single-Molecule Conformational Changes Under Shear Flow with Fluorescence Microscopy

Published on: January 25, 2020

5.8K
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

12.6K
Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing
07:07

Biomechanical Characterization of Human Soft Tissues Using Indentation and Tensile Testing

Published on: December 13, 2016

31.7K

Area of Science:

  • Physics
  • Materials Science
  • Statistical Mechanics

Background:

  • The jamming transition is a critical phenomenon observed in various disordered systems.
  • Understanding the dynamics near the jamming point is crucial for predicting material properties.

Purpose of the Study:

  • To investigate the jamming transition in a model of elastic particles under shear at zero temperature.
  • To analyze the relaxation time (τ₁) and its correlation with pressure (p₁) during the jamming transition.

Main Methods:

  • Two-step simulations: initial shearing followed by energy relaxation.
  • Determining relaxation time (τ₁) from the exponential decay of energy.
  • Analyzing correlations between τ₁, pressure (p₁), and shear variable (γ).

Main Results:

  • Pressure correlations (p₁) were found to be longer-lived than relaxation time correlations (τ₁).
  • Individual τ₁ is influenced by the starting configuration's pressure (p₁) and a random contribution dependent on relaxation path length.
  • A specific shear variable, γτ, derived from τ₁ correlations, is identified as relevant for critical exponent determination.

Conclusions:

  • The interplay between pressure and relaxation dynamics governs the jamming transition.
  • The identified γτ provides a more accurate parameter for characterizing critical exponents in sheared granular systems.
  • This study offers insights into the complex behavior of disordered materials near the jamming point.