pure and applied geophysics

, Volume 112, Issue 3, pp 571–581 | Cite as

Strain and creep measurements on rocks by halographic interferometry

  • Hartmut Spetzler
  • C. H. Scholz
  • Chi-Ping J. Lu
Article

Summary

A technique is described for measuring strains in rock deformation experiments by means of holographic interferometry. The method allows the entire surface displacement field of the sample to be mapped to within one-tenth the wavelength of light. Several illustrative experiments show that inhomogeneous strain, in particular bending and torsion, is commonly present in uniaxial compression experiments, and that some of this strain can be caused by the testing machine. In a creep experiment in uniaxia compression, a concentration of dilatancy was observed very early in the experiment that was spatially related to the location of the ultimate failure plane.

Keywords

Testing Machine Displacement Field Uniaxial Compression Entire Surface Surface Displacement 

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References

  1. [1]
    E. R. Robertson andJ. M. Harvey (eds.),The Engineering Uses of Holography (Cambridge University Press 1970).Google Scholar
  2. [2]
    L. O. Heflinger, R. F. Wuerker andH. Spetzler,Thermal expansion coefficient measurement of diffusely reflecting samples by holographic interferometry, Rev. Sci. Instrum 44 (5), May 1973.Google Scholar
  3. [3]
    H. Spetzler, L. O. Heflinger andR. F. Wuerker,Thermal expansion coefficient measurements of specularly reflecting samples, Rev. Sci. Instrum. 44 (5), May 1973.Google Scholar
  4. [4]
    M. D. Meyer andH. A. Spetzler,Material properties and strain determination using CIV holographic interferometry (submitted to J. Experimental Mechanics (1974)).Google Scholar
  5. [5]
    C. H. Scholz,Static fatigue of quartz, J. Geophys. Res. 77 (11), April 10, 1972.Google Scholar

Copyright information

© Birkhäuser-Verlag 1974

Authors and Affiliations

  • Hartmut Spetzler
    • 1
  • C. H. Scholz
    • 2
  • Chi-Ping J. Lu
    • 3
  1. 1.Sandia LaboratoriesLivermore
  2. 2.Lamont-Doherty Geological ObservatoryPalisades
  3. 3.State University of New YorkBinghamton

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