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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...
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IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Thermal Strain01:19

Thermal Strain

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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...
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Infrared (IR) Spectroscopy: Overview01:09

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
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Updated: Jan 17, 2026

Production of a Strain-Measuring Device with an Improved 3D Printer
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High-temperature strain measurement method based on scanning infrared signals.

Feng Lin, Chao Lin, Wenjing Zou

    Optics Express
    |September 23, 2025
    PubMed
    Summary

    A new non-contact strain measurement method, the edge radiation scanning method (ERSM), accurately monitors high-temperature turbine blades. This technique shows promise for aerospace engine diagnostics, improving accuracy with higher temperatures.

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    Area of Science:

    • Mechanical Engineering
    • Aerospace Engineering
    • Materials Science

    Background:

    • Strain measurement of turbine blades is critical for engine health.
    • Harsh operating environments pose significant challenges to traditional methods.
    • Existing techniques often lack accuracy or are contact-based.

    Purpose of the Study:

    • Introduce a novel non-contact strain measurement method.
    • Enable accurate strain monitoring of high-temperature rotating blades.
    • Assess the feasibility and performance of the new technique.

    Main Methods:

    • Developed the edge radiation scanning method (ERSM).
    • Utilized radiation differences between high-temperature objects and background.
    • Applied ERSM to measure strain on rotating turbine blades.

    Main Results:

    • Achieved an error rate of less than 4% in strain measurements.
    • Demonstrated improved measurement accuracy at higher temperatures.
    • Validated the effectiveness of ERSM in experimental settings.

    Conclusions:

    • ERSM is a viable non-contact method for turbine blade strain monitoring.
    • The technique shows significant potential for aerospace engine diagnostics.
    • Higher operating temperatures enhance the accuracy of ERSM.