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Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...

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Measurement of Compressive Stress-Strain Response at Small-Strains
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Design and Implementation of an Electromagnetic-Capacitive Coupling Mechanism-Based Material Young's Modulus

Zhuo Liu1, Xuemei Lu1, Heng Li2

  • 1Jiangsu Key Laboratory of Biophotonics, Suzhou City University, Suzhou 215104, China.

Materials (Basel, Switzerland)
|May 13, 2026
PubMed
Summary
This summary is machine-generated.

This study presents a novel system for measuring Young's modulus using electromagnetic excitation and capacitive sensing. The non-contact method offers controllable excitation for accurate material property evaluation.

Keywords:
capacitance detectionelectrodynamic drivematerial mechanical characterizationmeasurement systemtransient excitationyoung’s modulus

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Area of Science:

  • Materials Science
  • Biophysics
  • Mechanical Engineering

Background:

  • Young's modulus is crucial for material characterization in mechanical and biomechanical studies.
  • Current methods often rely on contact loading or large instruments, limiting practical applications.
  • There is a need for non-invasive, controllable, and integrated systems for elastic property measurement.

Purpose of the Study:

  • To design and implement a novel Young's modulus measurement system.
  • To utilize electromagnetic excitation and capacitive sensing for non-contact material analysis.
  • To enable quantitative evaluation of elastic properties, particularly for soft materials.

Main Methods:

  • A system combining electromagnetic driving and capacitive sensing was developed.
  • Transient mechanical excitation was achieved using Lorentz force generated by a coil and magnet.
  • Micro-scale surface deformation was monitored via capacitance variation (ΔC/C₀).
  • A force-capacitance coupling model was established for inverse calculation of Young's modulus.

Main Results:

  • The system was calibrated and verified using standard hardness blocks.
  • Experimentally obtained Young's modulus values showed good agreement with reference data.
  • The system demonstrated quantitative evaluation of elastic properties with acceptable deviation.

Conclusions:

  • The proposed system provides a viable method for non-invasive Young's modulus measurement.
  • Its compact design and controllable excitation make it suitable for soft materials and biological tissues.
  • This technology advances surface mechanical characterization capabilities.