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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

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 gauge...
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

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...
Stress-Strain Diagram01:10

Stress-Strain Diagram

A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This change in...
True Stress and True Strain01:28

True Stress and True Strain

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...
Transformation of Plane Strain01:12

Transformation of Plane Strain

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...

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Related Experiment Video

Updated: May 15, 2026

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
07:50

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

Measuring three-dimensional strain distribution in tendon.

G Khodabakhshi1, D Walker, A Scutt

  • 1Department of Computer Science, University of Sheffield, Sheffield, UK.

Journal of Microscopy
|January 18, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a novel 3D image analysis technique to examine tendon mechanics. The findings reveal complex fiber sliding and deformation modes, crucial for understanding tendon injury and healing.

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Last Updated: May 15, 2026

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
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Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation

Published on: January 27, 2023

Direct Linear Transformation for the Measurement of In-Situ Peripheral Nerve Strain During Stretching
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Biomechanical Testing of Murine Tendons
10:09

Biomechanical Testing of Murine Tendons

Published on: October 15, 2019

Area of Science:

  • Biomechanics
  • Biomedical Engineering
  • Orthopedics

Background:

  • Tendons transfer muscle force to bone, enabling skeletal movement.
  • Mechanical stress significantly impacts tendon healing and injury risk.
  • Understanding local strain and displacement is vital for tendon research.

Purpose of the Study:

  • To introduce a novel 3D image processing technique for analyzing tendon strain and displacement.
  • To investigate the mechanisms of load transfer within tendons under mechanical stress.
  • To identify different modes of tendon deformation during loading.

Main Methods:

  • Utilized a novel three-dimensional (3D) image processing technique.
  • Employed the Sheffield Image Registration Toolkit for data analysis.
  • Analyzed local strain and displacement distribution in tendon samples.

Main Results:

  • Local normal strain in the loading axis was lower than the global applied load.
  • Fiber sliding was identified as a primary load-transfer mechanism.
  • Observed three distinct deformation modes: parallel sliding, twisting, and transverse deflection.

Conclusions:

  • The novel 3D image registration method effectively analyzes out-of-plane movements in tendons.
  • Tendon deformation involves complex fiber sliding and varied modes, not detectable by 2D methods.
  • This technique enhances the understanding of tendon mechanics, injury, and healing processes.