Abstract
A real-time “Computer-Aided FRinge-pattern AN-alyzer” (CAFRAN) system for the analysis of photoelastic fringe is developed. The pattern-analyzing process which utilizes image analysis or pattern-recognition technique and discretized-computation process in terms of finite-element method play an important role in this system. The former makes it possible to readout the fringe position and the fringe order of both isochromatic and isoclinic informations, and the latter analyzes the sum of the principal stresses which constitutes the Laplace field. Both results are combined to give the distributions of stress components over the domain under consideration.
As far as the results of classical problems solved by this technique are concerned, the CAFRAN is promising in reading the fractional fringe order and encouraging the use of this technique to such problems as stress concentration.
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Seguchi, Y., Tomita, Y. & Watanabe, M. Computer-aided fringe-pattern analyzer—A case of photoelastic fringe. Experimental Mechanics 19, 362–370 (1979). https://doi.org/10.1007/BF02324251
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DOI: https://doi.org/10.1007/BF02324251