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Theory of elastic and photoelastic isodynes. Samples of application in composite structures

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Abstract

The theoretical foundations of a system of new methods which the authors call ‘isodyne photoelasticity’ are presented. It is shown that the plane-elastic isodynes related to two-dimensional stress fields can be obtained experimentally using particular scattered-light techniques. The experimentally obtained photoelastic isodynes allow non-destructive analysis of stresses in structures with local three-dimensional stress states.

Isodyne photoelasticity is used to determine stresses in composite structures, in particular the stresses at internal discontinuities and the delaminating stresses. The results are used to assess the reliability of some analytical solutions. The theories of isodynes and of the developed experimental techniques of isodyne photoelasticity are presented in a manner compatible with contemporary concepts of the models of reality—physical models, mathematical models, and experimental models constructed of matter and energy.

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Authors and Affiliations

  1. Institute for Experimental Mechanics, Faculty of Engineering, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada

    J. T. Pindera (SEM Member) is Director)

  2. WYDA Systems (Canada), Inc., M3C 3H1, Don Mills, Ontario, Canada

    B. R. Krasnowski (SEM Member) is Mathematician)

  3. Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, 24061, Blacksburg, VA

    M. -J. Pindera (Assistant Professor)

Authors
  1. J. T. Pindera
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  2. B. R. Krasnowski
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  3. M. -J. Pindera
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Pindera, J.T., Krasnowski, B.R. & Pindera, M.J. Theory of elastic and photoelastic isodynes. Samples of application in composite structures. Experimental Mechanics 25, 272–281 (1985). https://doi.org/10.1007/BF02325097

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  • DOI: https://doi.org/10.1007/BF02325097

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