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Application of birefringent coatings to glass-fiber-reinforced plastics

Research indicates that birefringent coatings can effectively be employed as an experimental method to solve a large class of stress-analysis problems associated with GFRP materials

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Abstract

The application of birefringent coatings to plane-stress problems associated with orthotropic-glassreinforced plastic materials is treated. The improvement in the sensitivity of the birefringent-coating method due to the high strength and low modulus of the glassfiber-reinforced plastic materials is noted. Next, the effect of a mismatch in Poisson's ratio between the specimen material and coating is examined and a correction factor is developed which permits determination of boundary stresses even when the mismatch is large. Finally, the stress-strain relations for an orthotropic material are reviewed and an example of a nonsymmetric stress distribution associated with a symmetric fringe pattern is covered.

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References

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Authors and Affiliations

  1. Experimental Stress Analysis Laboratory, Illinois Institute of Technology, Chicago, Ill.

    J. W. Dally (Professor of Mechanics and Director)

  2. University of Zagreb, Yugoslavia

    I. Alfirevich (Instructor of Mechanics)

Authors
  1. J. W. Dally
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  2. I. Alfirevich
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Additional information

This research is part of a thesis submitted to Illinois Institute of Technology in partial fulfillment of the requirements for the MS degree.

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Dally, J.W., Alfirevich, I. Application of birefringent coatings to glass-fiber-reinforced plastics. Experimental Mechanics 9, 97–102 (1969). https://doi.org/10.1007/BF02327694

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  • DOI: https://doi.org/10.1007/BF02327694

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