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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...
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

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...
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...

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Related Experiment Video

Updated: May 28, 2026

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
09:29

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens

Published on: January 24, 2016

An improved texture correlation algorithm to measure substrate-cytoskeletal network strain transfer under large

Ruogang Zhao1, Craig A Simmons

  • 1Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada.

Journal of Biomechanics
|October 28, 2011
PubMed
Summary
This summary is machine-generated.

This study shows that cell cytoskeleton deformation directly mirrors large substrate strains, independent of cell alignment. New algorithms enable precise measurement of these cell-matrix interactions under significant deformation.

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High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

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Last Updated: May 28, 2026

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09:29

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Published on: January 24, 2016

Measuring Local Tissue Strains in Tendons via Open-Source Digital Image Correlation
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High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain
09:20

High-resolution Imaging of Nuclear Dynamics in Live Cells under Uniaxial Tensile Strain

Published on: June 2, 2019

Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • Cellular forces are transmitted to the cytoskeleton (CSK) via focal adhesions.
  • Previous research quantified substrate-to-cell strain transfer below 15% using mitochondria as markers.
  • Accuracy of mitochondrial displacement for CSK deformation and transfer of strains >15% remain unclear.

Purpose of the Study:

  • To develop and validate a novel algorithm for accurate image analysis of large deformations.
  • To quantify substrate-to-CSK strain transfer in living cells at high compressive strain magnitudes (-40%).
  • To investigate the relationship between substrate strain and CSK deformation under large forces.

Main Methods:

  • Developed a texture correlation algorithm to correct for image distortion during large strains.
  • Utilized fluorescently tagged actin for tracking CSK deformation.
  • Employed fluorescently tagged actin and talin for validation measurements.
  • Applied large compressive strains (-40%) to the substrate.

Main Results:

  • Demonstrated direct transfer of substrate strain to CSK deformation in living cells.
  • Quantified strain transfer ratios at -40% compressive strain.
  • Found that strain transfer ratios are independent of cell alignment.
  • Validated the accuracy of the new algorithm for large deformation analysis.

Conclusions:

  • Substrate strain is directly transduced to CSK deformation even under large compressive forces.
  • The developed algorithm allows for precise characterization of cell-matrix interactions under significant deformation.
  • Findings offer new insights into mechanotransduction mechanisms in conditions of substantial mechanical stress.