Characterizing the elastic shear modulus of a soft medium via a thermally induced elastic shear wave in thermodynamic equilibrium

Sheng Yi Chang, Sanboh Lee, Wei Ru Chen, Ming Yih Lee, Chien Chou

Research output: Contribution to journalJournal Article peer-review

1 Scopus citations

Abstract

A novel method to characterize the elastic shear modulus of an isotropic, homogeneous and extremely soft material based on a thermally induced elastic shear wave (TIESW) under thermodynamic equilibrium at room temperature is proposed. The temporal evolution of the TIESW on the surface of a squared polyvinyl acetate (PVA) specimen is observed, while the oscillation frequency of the TIESW is measured by using a two-frequency polarized heterodyne interferometer. In experiments, the oscillation frequency of the TIESW in PVA specimens is in the range of 10-3 Hz, which is equivalent to μ Pa on the elastic shear modulus. The features and advantages of the TIESW-based method in comparison to conventional methods are discussed.

Original languageEnglish
Article number035104
JournalMeasurement Science and Technology
Volume29
Issue number3
DOIs
StatePublished - 08 02 2018

Bibliographical note

Publisher Copyright:
© 2018 IOP Publishing Ltd.

Keywords

  • elastic shear modulus
  • heterodyne interferometry
  • thermally induced elastic shear wave

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