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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.5K
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...
2.5K
Stress-Strain Diagram01:10

Stress-Strain Diagram

2.1K
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...
2.1K
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

835
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
835
True Stress and True Strain01:28

True Stress and True Strain

699
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...
699
Thermal Strain01:19

Thermal Strain

2.7K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
2.7K
Strain and Elastic Modulus01:15

Strain and Elastic Modulus

8.5K
The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
8.5K

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Related Experiment Video

Updated: Dec 18, 2025

Production of a Strain-Measuring Device with an Improved 3D Printer
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Production of a Strain-Measuring Device with an Improved 3D Printer

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How to do LA strain.

Jens-Uwe Voigt1,2, Georgiana-Grațiela Mălăescu1,2, Kristina Haugaa3

  • 1Department of Cardiovascular Sciences, Catholic University Leuven, Herestraat 49, 3000 Leuven, Belgium.

European Heart Journal. Cardiovascular Imaging
|June 18, 2020
PubMed
Summary
This summary is machine-generated.

Modern speckle tracking offers clinical assessment of atrial strain. This guide helps users avoid common problems and achieve reliable measurements, addressing the technique

Keywords:
Left Atrial FunctionLeft Atrial StrainLeft AtriumRecommendationsSpeckle Tracking

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Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Speckle tracking echocardiography is an emerging tool for evaluating atrial function.
  • Current clinical application of atrial strain analysis faces challenges due to a lack of standardization.
  • Routine use of this technique can lead to user-specific errors and unreliable results.

Purpose of the Study:

  • To provide practical guidance for clinicians using speckle tracking for atrial strain assessment.
  • To highlight common pitfalls encountered during routine clinical use.
  • To promote reproducible and reliable atrial strain measurements.

Main Methods:

  • Review of current speckle tracking technologies for atrial strain analysis.
  • Identification of common technical challenges and sources of error.
  • Development of best-practice recommendations based on expert consensus and literature review.

Main Results:

  • Detailed description of potential pitfalls in atrial strain measurement.
  • Step-by-step guidance on optimizing image acquisition and analysis parameters.
  • Strategies for ensuring inter-observer and intra-observer reproducibility.

Conclusions:

  • Standardized protocols are essential for reliable atrial strain assessment using speckle tracking.
  • Adherence to recommended guidelines can minimize errors and improve diagnostic accuracy.
  • This guidance facilitates the effective integration of atrial strain analysis into clinical practice.