Mechanical Characterization of Paper by Laser Speckle Interferometry

  • B. Castagnede


A laser speckle interferometry method applied to the determination of strains in paper is described. We are able to characterize the two-dimensional strain field of the viewed surface for different test configurations (tension, compression). The method is shown to provide detailed strain information all along the stress-strain curve until failure.

Paper materials have certain unique characteristics related to their fibrous network composition. Internal light reflections and refractions on numerous surfaces in the translucent structure create a decorrelation phenomenon. This problem is avoided by using a thin coating technique.

The strain field is shown to be inhomogeneous. A technique for strain determinations over a square grid (7 columns, 22 rows) with a 3 mm spacing is described. Our method allows a determination of differences in properties for machine-made papers (which are anisotropic) between the machine direction (MD) and the cross-machine direction (CD). Additionally, a method ta compute the in-plane Poisson ratios is proposed.

Details concerning the optical filtering technique used for information processing are given. This semi-automatic system provides a high level of confidence in the measurements and permits the detection of very fine effects.


Holographic Interferometry Machine Direction Laser Speckle Paper Material Fiber Orientation Distribution 


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  1. [1]
    V.C. Setterholm and D.E. Gunderson, Observations on Load-Deformation Testing, in: “Handbook of Physical and Mechanical Testing of Paper and Paperboard”, vol.1, R.E. Mark, ed., Marcel Dekker, New York, (1983).Google Scholar
  2. [2]
    D.R. Axelrad and K. Rezai, Deformation Measurement of Thin Foils by Holographic Interferometry. Proc. Conf. Holographic Interferometry and Speckle Metrology, Am. Optic. Soc.,(1980).Google Scholar
  3. [3]
    M.B. Lyne and H. Bjelkhagen, Pulp and Paper Mag. Canada, 7:29 (1981).Google Scholar
  4. [4]
    R.P. Khetan and F.P. Chiang, Appl. Optics, 15:2205 (1976).CrossRefGoogle Scholar
  5. [5]
    D.W. Li, J.B. Chen and F.P. Chiang, J. Opt. Soc. Am. A, 2:657(1985).CrossRefGoogle Scholar
  6. [6]
    M. Francon, Information Processing Using Speckle Patterns, in: “Laser Speckle and Related Phenomena”, J.C. Dainty, ed., Springer-Verlag, Berlin, (1984).Google Scholar
  7. [7]
    I. Yamaguchi, Optica Acta, 28:1359 (1981).CrossRefGoogle Scholar
  8. [8]
    I. Yamaguchi, J. Opt. Soc. Am. A, 1:81 (1984).CrossRefGoogle Scholar
  9. [9]
    R.W. Perkins and R.E. Mark, “Micromechanics Constitutive Model for Ribbon-like Fiber Non-wovens.”, presented to Penn State University Oct. 7–9 (1985).Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • B. Castagnede
    • 1
  1. 1.College of Environmental Science and ForestryState University of New YorkSyracuseUSA

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