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On a type of photoelastic mottle in an epoxy resin

A method which has reduced undesirable, permanent birefringence in castings of a resin used for three-dimensional photoelasticity is discussed in this technical note

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Summary

Prolonged stirring of Araldite 6020 and phthalic anhydride before casting has resulted in considerable reduction of mottle and minor improvements in clarity and figure of merit. Some care is required to avoid premature gelation and the inclusion of air bubbles and foreign particles.

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References

  1. Sugarman, B., Moxley, G. O., andMarshall, I. A., “A Castable Polyester Resin for Photoelastic Work,”Brit. Jnl. Appl. Phys., 3, No. 7, 233–237 (July 1952).

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  2. Spooner, H., andMcConnell, L. D., “An Ethoxylene Resin for Photoelastic Work,”Brit. Jnl. Appl Phys., 4, No. 6, 181–184 (June 1953).

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  3. Leven, M. M., “Epoxy Resins for Photoelastic Use,”reported in Photoelasticity (Proceedings of 1961 International Symposium),M. M. Frocht, ed., Pergamon Press, New York, 1963, pp. 145–165.

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  4. J. H. Hemann, University of Illinois, unpublished data.

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Authors and Affiliations

  1. Engineering Mechanics Dept., University of Wisconsin, Madison, Wis.

    R. D. Cook (Assistant Prof.)

Authors
  1. R. D. Cook
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Cook, R.D. On a type of photoelastic mottle in an epoxy resin. Experimental Mechanics 4, 151–152 (1964). https://doi.org/10.1007/BF02322970

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  • DOI: https://doi.org/10.1007/BF02322970

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