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The behavior of a photoelastic polyurethane at elevated temperatures

Mechanical and optical characteristics of a photoelastic polyurethane at elevated temperatures are described, with application to viscoelastic stress-concentration factors

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Abstract

The mechanical and optical behavior of a photoelastic polyurethane at ambient and elevated temperatures is measured and discussed. The data presented extend the temperature range of useful information given for the same material by M. L. Williams,et al. The data are shown to conform to the kinetic theory of polymers or the theory of rubberlike elasticity. The rubbery-flow range of the material is explored and it is shown that experimental observations therein agree with molecular descriptions of deformation given by others. Generally, it is shown that the optic behavior of the material is more closely associated with stress than with strain in both the rubbery and rubbery-flow regions. Further, the stress-optic nature of the material is used to measure viscoelastic stress-concentration factors for a tensile strip containing a circular hole.

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Authors and Affiliations

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

    Halbert F. Brinson (Associate Professor)

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  1. Halbert F. Brinson
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Brinson, H.F. The behavior of a photoelastic polyurethane at elevated temperatures. Experimental Mechanics 16, 1–5 (1976). https://doi.org/10.1007/BF02328913

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  • DOI: https://doi.org/10.1007/BF02328913

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