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Related Concept Videos

Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

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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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Measurements of Strain01:27

Measurements of Strain

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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...
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Transformation of Plane Strain01:12

Transformation of Plane Strain

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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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Stress-Strain Diagram01:10

Stress-Strain Diagram

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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...
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Shearing Strain01:20

Shearing Strain

2.0K
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 the...
2.0K
True Stress and True Strain01:28

True Stress and True Strain

1.1K
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.
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Related Experiment Video

Updated: Apr 18, 2026

Using Digital Image Correlation to Characterize Local Strains on Vascular Tissue Specimens
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Two-Dimensional Strain Imaging: Basic principles and Technical Consideration.

Mustafa Kurt1, Ibrahim Halil Tanboga2, Enbiya Aksakal2

  • 1Department of Cardiology, Mustafa Kemal University Faculty of Medicine, Hatay, Turkey.

The Eurasian Journal of Medicine
|January 23, 2015
PubMed
Summary

Tissue Doppler Imaging (TDI) offers accurate myocardial function assessment but is angle-dependent. Speckle tracking echocardiography (STE) overcomes this limitation, providing unique insights into myocardial fiber orientation for improved cardiac function analysis.

Keywords:
Left ventricledeformationspeckle trackingstrain

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Last Updated: Apr 18, 2026

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Area of Science:

  • Cardiovascular Imaging
  • Cardiac Mechanics
  • Echocardiography

Background:

  • Tissue Doppler Imaging (TDI) and TDI-derived strain are valuable for non-invasive assessment of local myocardial functions.
  • TDI's high temporal and spatial resolution enables detailed analysis of myocardial function throughout the cardiac cycle.
  • A significant limitation of TDI is its angle dependence, which can affect accuracy.

Purpose of the Study:

  • To review the architectural structure and function of the myocardium.
  • To provide technical revisions of myocardial assessment methods.
  • To establish a foundation for understanding speckle tracking echocardiography (STE) in myocardial analysis.

Main Methods:

  • Review of existing literature on Tissue Doppler Imaging (TDI) and myocardial deformation techniques.
  • Examination of the principles and technical aspects of speckle tracking echocardiography (STE).
  • Analysis of myocardial architecture and function relevant to echocardiographic assessment.

Main Results:

  • TDI provides accurate, angle-dependent assessments of local myocardial function.
  • Speckle tracking echocardiography (STE) overcomes TDI's angle dependence.
  • STE offers unique information regarding myocardial fiber orientation.

Conclusions:

  • Speckle tracking echocardiography (STE) represents an advancement over TDI for myocardial strain analysis.
  • STE's ability to assess myocardial fiber orientation provides novel insights.
  • Understanding myocardial structure and function is crucial for interpreting advanced echocardiographic techniques like STE.