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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

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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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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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Piezoelectric-based apparatus for strain tuning.

Clifford W Hicks1, Mark E Barber1, Stephen D Edkins2

  • 1Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, Dresden 01187, Germany.

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|July 3, 2014
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Summary

We developed a new piezoelectric apparatus for applying tunable strains to samples at various temperatures, including cryogenic conditions. This compact device achieves large strains up to 0.23% and ensures homogeneous strain distribution for high-aspect-ratio samples.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Cryogenics

Background:

  • Characterizing material properties under mechanical strain requires specialized equipment.
  • Existing strain application methods may have limitations in temperature range or strain homogeneity.

Purpose of the Study:

  • To design and construct a versatile piezoelectric apparatus for applying tunable compressive and tensile strains.
  • To enable strain testing across a wide temperature range, including cryogenic conditions.
  • To develop a sample mounting technique for high strain homogeneity.

Main Methods:

  • Utilized piezoelectric actuators for precise strain control.
  • Designed a compact apparatus compatible with various experimental probes.
  • Implemented a novel sample mounting method for high-aspect-ratio specimens.

Main Results:

  • Successfully constructed a piezoelectric-based strain apparatus.
  • Demonstrated continuous tuneable strain application up to 0.23% at cryogenic temperatures.
  • Achieved high strain homogeneity with the developed mounting technique.

Conclusions:

  • The developed apparatus offers a versatile solution for mechanical strain testing.
  • Its capability to operate at cryogenic temperatures and achieve high strain homogeneity is significant.
  • The apparatus is suitable for a broad range of materials characterization experiments.