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Experimental Mechanics

, Volume 34, Issue 1, pp 89–92 | Cite as

Real-time shearography for measuring time-dependent displacement derivatives

  • Y. Y. Hung
  • S. Tang
  • J. D. Hovanesian
Article

Abstract

Shearography is an interferometric method for the direct measurement of derivatives of surface displacement. Shearography is traditionally practiced with a double-exposure mode. This paper presents a realtime technique which allows the derivative of surface displacement of the test object to be continuously observed. This technique is useful for monitoring time-dependent or transient deformation.

Keywords

Mechanical Engineer Fluid Dynamics Direct Measurement Test Object Surface Displacement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Hung, Y.Y., “Shearography: A New Optical Method for Strain Measurement and Nondestructive Testing,”Opt. Eng. 21,391 (1982).Google Scholar
  2. 2.
    Hung, Y.Y., “Speckle-shearing Interferometer,”Optics Commun.,11,732 (1974).CrossRefMathSciNetGoogle Scholar
  3. 3.
    Takezaki, J. andHung, Y.Y., “Direct Measurement of Flexural Strains in Plates by Shearography,”J. Appl. Mech.,53,125 (1986).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1994

Authors and Affiliations

  • Y. Y. Hung
    • 1
  • S. Tang
    • 2
  • J. D. Hovanesian
    • 3
  1. 1.Department of Mechanical EngineeringOakland UniversityRochester Hills
  2. 2.Phase Shift TechnologyTucson
  3. 3.Oakland UniversityUSA

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