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On the role of material and optical properties in complete photoelastic analysis

Absolute-retardation measurements of various epoxies and urethane rubbers were made to illustrate different combinations of material and photoelastic properties. Primary attention is given to materials with Poisson's ratio near 0.5

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Abstract

Consideration of the laws of elasticity and optics allows the classification of photoelastic materials into several categories. Two types of photoelastic materials are studied experimentally in compressible and incompressible forms to decide in which category they belong. Two epoxies and three polyurethane rubbers are reported. Both epoxies were calibrated for their response to frozen stress, and one under live load. The rubbers were all calibrated under live load at ambient temperature. The results support an earlier hypothesis that the photoelastic response of incompressible materials is strain sensitive and cannot be used directly in the general three-dimensional case to determine normal stress without additional data.

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Authors and Affiliations

  1. Catholic University of America, 20064, Washington, DC

    V. J. Parks

  2. Naval Research Laboratory, 20375, Washington, DC

    R. J. Sanford

Authors
  1. V. J. Parks
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  2. R. J. Sanford
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Parks, V.J., Sanford, R.J. On the role of material and optical properties in complete photoelastic analysis. Experimental Mechanics 16, 441–447 (1976). https://doi.org/10.1007/BF02324100

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  • DOI: https://doi.org/10.1007/BF02324100

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