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Related Concept Videos

Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

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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...
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Measurements of Strain01:27

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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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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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Temperature Dependent Deformation01:12

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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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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True Stress and True Strain01:28

True Stress and True Strain

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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.
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Related Experiment Video

Updated: Dec 29, 2025

Production of a Strain-Measuring Device with an Improved 3D Printer
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Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor.

Lu Peng1, Genqiang Jing1, Zhu Luo1

  • 1National Center of Metrization for Equipments of Roads and Bridges, Research Institute of Highway Ministry of Transport, Beijing 100088, China.

Sensors (Basel, Switzerland)
|January 30, 2020
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Summary

This study validates the reliability and stability of dynamic vibrating wire strain gauges. It confirms their suitability for real-world engineering applications by analyzing temperature and prestress effects on sensor measurements.

Keywords:
bridge structureparallel positiontemperaturevibrating wire strain sensor

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Area of Science:

  • Engineering
  • Materials Science
  • Geophysics

Background:

  • Deformation monitoring is crucial for structural health in transportation and bridge engineering.
  • Sensor reliability, including signal drift in strain gauges, poses a challenge for long-term structural monitoring.
  • Accurate strain measurements require traceability to high-precision standards.

Purpose of the Study:

  • To assess the reliability and stability of dynamic vibrating wire strain gauges.
  • To investigate the influence of temperature and prestress on sensor measurements.
  • To provide support for onsite online meteorology in engineering applications.

Main Methods:

  • Utilized a parallel measurement method with two identical vibrating wire strain gauges.
  • Employed high-frequency dynamic acquisition based on time series principles to measure thermometer strain.
  • Analyzed the correlation between strain and temperature, and the influence of prestress on sensor readings.

Main Results:

  • Measurement repetitiveness was analyzed using meteorological knowledge of single sensor data.
  • The experiment focused on the differential effects of temperature and prestress on sensor measurements.
  • The reliability and stability of dynamic vibrating wire strain gauges were verified.

Conclusions:

  • Dynamic vibrating wire strain gauges demonstrate reliability and stability for engineering applications.
  • Understanding temperature and prestress effects is key to accurate sensor performance.
  • The findings support the use of onsite online meteorology for real-time engineering monitoring.