Abstract

Moire interferometry is used to measure in-plane displacements, U and V, on flat surfaces. It extends the sensitivity of moire methods into the subwave-length range, making it suitable for the analysis of localized deformations of structural composites. The method is characterized by a remarkable set of qualities: it is a whole-field and real-time method, and it provides high sensitivity, excellent fringe contrast, high spatial resolution and extensive range. Moire interferometry nicely fills the gap between capabilities of other experimental techniques, inasmuch as it can be used in zones of very high strain gradients and it can be used to determine shear strains as readily as normal strains.

Keywords

Fringe Pattern Camera Lens Versus Field Fringe Order Parabolic Mirror 
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

Publications

  1. 1.
    Czarnek, R., Post, D., and Guo, Y., “Strain Concentration Factors in Composite Tensile Members with Central Holes,” Proc. 1987 SEM Spring Conf. on Experimental Mechanics, Houston, TX (June 14–19, 1987).Google Scholar
  2. 2.
    Post, D., Czarnek, R., Joh, D., Jo, J. and Guo, Y, “Deformation of a Metal-Matrix Tensile Coupon with a Central Slot: An Experimental Study,” Journal of Composites Technology & Research, Vol. 9, No. 1, Spring 1987, pp. 3–9.CrossRefGoogle Scholar
  3. 3.
    Post, D., “Moire Interferometry,” Handbook of Experimental Mechanics, ed. A.S. Kobayashi, Ch. 7, Prentice-Hall, Englewood Cliffs, NJ (1987).Google Scholar
  4. 4.
    Post, D., Dai, F.L., Guo, Y. and Ifju, P., “Interlaminar Shear Moduli of Cross-Ply Laminates: An Experimental Analysis,” J. Composite Materials, 23 (3), pp. 264–279 (March 1989).CrossRefGoogle Scholar
  5. 5.
    Guo, Y., Post, D. and Czarnek, R., “The Magic of Carrier Fringes in Moire Interferometry,” experimental mechanics (to be published).Google Scholar

Copyright information

© Society for Experimental Mechanics 1989

Authors and Affiliations

  • Daniel Post

There are no affiliations available

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