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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...
Distance Measurements by Taping01:18

Distance Measurements by Taping

Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
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Drug Concentration Versus Time Correlation

The plasma drug concentration-time curve is a crucial tool in pharmacokinetics, representing the drug's concentration in plasma at different time intervals post-administration. This curve illustrates the drug's journey from absorption into the systemic circulation, distribution to body tissues, and eventual elimination through excretion or biotransformation.
Two pivotal parameters are the minimum effective concentration (MEC) and the minimum toxic concentration (MTC). The MEC is the lowest drug...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
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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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...

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Related Experiment Video

Updated: Jun 17, 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

Real-time strain measurements by optical correlation.

E Marom

    Applied Optics
    |January 16, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Two optical correlation methods accurately measure material strain. These techniques achieve a sensitivity of approximately 10 parts per million (ppm), showing potential for further enhancement.

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    Area of Science:

    • Optics
    • Materials Science
    • Solid Mechanics

    Background:

    • Accurate strain measurement is crucial for material analysis and structural integrity.
    • Optical methods offer non-contact and potentially high-sensitivity approaches to strain determination.

    Purpose of the Study:

    • To present and evaluate two distinct optical correlation techniques for quantifying material strain.
    • To assess the sensitivity and potential improvements of these methods.

    Main Methods:

    • Method 1: Strain determination via longitudinal variations in object-holographic filter separation.
    • Method 2: Direct strain measurement by accurately quantifying lateral displacement of correlated areas.

    Main Results:

    • Both optical correlation techniques demonstrated a strain sensitivity of approximately 10 ppm.
    • Experimental results suggest potential for further refinement and increased sensitivity.

    Conclusions:

    • Optical correlation offers a viable and sensitive approach for material strain analysis.
    • The presented methods provide precise strain measurement capabilities with room for optimization.