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

Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

525
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...
525
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
Stress-Strain Diagram - Ductile Materials01:24

Stress-Strain Diagram - Ductile Materials

1.8K
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
1.8K
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
Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

438
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
438
True Stress and True Strain01:28

True Stress and True Strain

721
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...
721

You might also read

Related Articles

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

Sort by
Same author

Single-leg supine cycling: An alternative for patients requiring exercise catheterization and femoral access.

European journal of heart failure·2025
Same author

Advancing the Diagnosis and Management of Heart Failure with Preserved Ejection Fraction: A Call for Exercise Hemodynamics.

Arquivos brasileiros de cardiologia·2024
Same author

Position Statement on the Use of Myocardial Strain in Cardiology Routines by the Brazilian Society of Cardiology's Department Of Cardiovascular Imaging - 2023.

Arquivos brasileiros de cardiologia·2024
Same author

Mechanical dispersion is a superior echocardiographic feature to predict exercise capacity in preclinical and overt heart failure with preserved ejection fraction.

The international journal of cardiovascular imaging·2023
Same author

A machine learning framework for the evaluation of myocardial rotation in patients with noncompaction cardiomyopathy.

PloS one·2021
Same author

Comparison of spatial temporal representations of the vectorcardiogram using digital image processing.

Journal of electrocardiology·2020

Related Experiment Video

Updated: Dec 24, 2025

Intermediate Strain Rate Material Characterization with Digital Image Correlation
07:59

Intermediate Strain Rate Material Characterization with Digital Image Correlation

Published on: March 1, 2019

7.5K

Software for Post-Processing Analysis of Strain Curves: The D-Station.

Rafael Duarte de Sousa1, Carlos Danilo Miranda Regis1, Ittalo Dos Santos Silva1

  • 1Instituto Federal de Educação, Ciência e Tecnologia da Paraíba,João Pessoa, PB - Brasil.

Arquivos Brasileiros De Cardiologia
|April 9, 2020
PubMed
Summary

A new free software, D-Station, effectively analyzes cardiac strain curves. It was validated against EchoPAC, showing strong correlation and equivalence for evaluating cardiac function using speckle-tracking echocardiography.

More Related Videos

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

3.4K
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

9.7K

Related Experiment Videos

Last Updated: Dec 24, 2025

Intermediate Strain Rate Material Characterization with Digital Image Correlation
07:59

Intermediate Strain Rate Material Characterization with Digital Image Correlation

Published on: March 1, 2019

7.5K
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

3.4K
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

9.7K

Area of Science:

  • Cardiology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Speckle-tracking echocardiography is widely used for cardiac function assessment.
  • Tools are needed to extract and integrate strain data into standard parameters.

Purpose of the Study:

  • To present and validate D-Station, a free software for cardiac strain curve analysis.
  • To assess the software's utility in extracting relevant data for cardiac function parameters.

Main Methods:

  • D-Station processes raw data to determine cardiac cycle phases and display strain/strain rate curves.
  • Validation involved comparing D-Station with EchoPAC using global longitudinal strain (GLS).
  • Methods included graphical comparison, correlation coefficients, hypothesis testing, and Bland-Altman analysis.

Main Results:

  • Strong correlation was found between D-Station and EchoPAC measurements (Spearman's rho).
  • Hypothesis testing showed equivalence (p-value = 0.6798 >> 0.05).
  • Bland-Altman analysis indicated minimal bias (≤ 1%) and dispersion (≤ 2%).

Conclusions:

  • D-Station software is validated as a reliable tool for analyzing cardiac strain and strain rate curves.
  • It serves as a valuable adjunct to EchoPAC for extracting data from proprietary software outputs.
  • The software facilitates the inclusion of strain data in traditional cardiac function parameters.