Non-contact and real-time measurement of Kolsky bar with temporal speckle interferometry

Shanwei Yang, Zhan Gao, Haihui Ruan, Chenjia Gao, Xu Wang, Xiang Sun, Xin Wen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


In this paper, a new non-contact and real-time measurement system for Kolsky bars is presented. This system uses two sets of temporal speckle interferometry in-plane displacement measurement devices to replace two strain gauges of conventional Kolsky bars. The in-plane displacement measurement of the Kolsky bar is mainly intended to provide a new test method for the dynamic mechanical properties of small-size material samples with diameters below 2 mm. This method is non-contact, does not require any intermediate medium, and can make the Kolsky bar applicable to characterizing the dynamic mechanical properties of materials under higher strain rates and smaller size conditions. The measuring devices and principles are described. In addition, a preliminary experiment is carried out to demonstrate the performance of this new device.
Original languageEnglish
Article number808
JournalApplied Sciences (Switzerland)
Issue number5
Publication statusPublished - 17 May 2018


  • Dynamic mechanical properties
  • In-plane displacement measurement
  • Kolsky bar
  • Speckle
  • Wavelet transform

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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