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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

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Abstract

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 stressesσ 1 +σ 2 are modulated by simultaneous appearance of the isochromatic fringes which related to the distribution of the difference of principal stressesσ 1 -σ 2. 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.

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Authors and Affiliations

  1. The Institute of Physical and Chemical Research, Bunkyo-ku, Tokyo, Japan

    M. Nisida & H. Saito

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  1. M. Nisida
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  2. H. Saito
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Nisida, M., Saito, H. A new interferomemtric method of two-dimensional stress analysis. Experimental Mechanics 4, 366–376 (1964). https://doi.org/10.1007/BF02322795

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  • DOI: https://doi.org/10.1007/BF02322795

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