Experimental Mechanics

, Volume 4, Issue 12, pp 366–376

A new interferomemtric method of two-dimensional stress analysis

The use of interferometry in obtaining both the sum and difference of principal stresses simultaneously in two-dimensional stress distribution is discussed by the authors
  • M. Nisida
  • H. Saito

DOI: 10.1007/BF02322795

Cite this article as:
Nisida, M. & Saito, H. Experimental Mechanics (1964) 4: 366. doi:10.1007/BF02322795


An interformetric method of obtaining the two principal stresses separately in two-dimensional stress distribution is described. An analytical interpretation is given of the relation between the stress-strain state of a transparent elastic plate and the light intensity of the plate observed through the Mach-Zehnder interferometer. The isopachic fringes which give the distribution of the sum of the principal stressesσ1 +σ2 are modulated by simultaneous appearance of the isochromatic fringes which related to the distribution of the difference of principal stressesσ1 -σ2. Accordingly, a single pattern obtained by this method provides sufficient information for evaluating the two principal stresses separately.

As examples, a few two-dimensional cases are treated and some practical procedures for carrying out the experiment are described. The feasibility of this method for the general three-diensions frozen-stress model is also discussed.

Copyright information

© Society for Experimental Mechanics, Inc. 1964

Authors and Affiliations

  • M. Nisida
    • 1
  • H. Saito
    • 1
  1. 1.The Institute of Physical and Chemical ResearchTokyoJapan