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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.7K
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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Stress-Strain Diagram01:10

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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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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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Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

1.1K
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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Strain and Elastic Modulus01:15

Strain and Elastic Modulus

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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...
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Updated: Mar 11, 2026

Production of a Strain-Measuring Device with an Improved 3D Printer
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Sensor for Measuring Strain in Textile.

Corinne Mattmann1, Frank Clemens2, Gerhard Tröster3

  • 1Wearable Computing Lab, ETH Zürich, Gloriastrasse 35, 8092 Zürich, Switzerland. mattmann@ife.ee.ethz.ch.

Sensors (Basel, Switzerland)
|November 24, 2016
PubMed
Summary
This summary is machine-generated.

A novel fiber-shaped strain sensor, made from thermoplastic elastomer and carbon black, accurately measures large strains in textiles. This washable sensor enables precise posture recognition in smart garments.

Keywords:
elastomer.strain sensortextile integrated

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Area of Science:

  • Materials Science
  • Textile Engineering
  • Wearable Technology

Background:

  • Textile-based sensors are crucial for wearable technology.
  • Existing strain sensors often lack durability or accuracy for large deformations.

Purpose of the Study:

  • To develop and characterize a novel fiber-shaped strain sensor for textiles.
  • To evaluate the sensor's performance under various conditions and its suitability for garment integration.

Main Methods:

  • Fabrication of a fiber-shaped sensor using a thermoplastic elastomer (TPE) and carbon black mixture.
  • Characterization using a strain tester, measuring resistance changes during extension-retraction cycles.
  • Testing sensor durability through repeated washing cycles.
  • Integration of sensors into a catsuit for posture recognition application.

Main Results:

  • The sensor demonstrated a linear resistance response to strain up to 80%.
  • It exhibited minimal hysteresis, minimal dependence on strain velocity, and no ageing effects.
  • The total mean error in strain measurement was +/-5.5%.
  • Sensor properties remained unaffected after multiple washing cycles.
  • 21 sensors integrated into a catsuit recognized 27 upper body postures with 97% accuracy.

Conclusions:

  • The developed fiber-shaped strain sensor is highly effective for measuring large strains in textiles.
  • Its robustness, durability (including washability), and accuracy make it suitable for integration into smart garments.
  • The successful application in posture recognition highlights its potential for advanced human-computer interaction and health monitoring.