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Natural stress used to obtain linear elastic and optical properties of a rubber under large strains

Uniaxial and biaxial tensile tests on a polyurethane rubber are described in this paper and the results are analyzed introducing the concept of “natural stress”

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Abstract

The mechanical and optical properties of some rubbers, like the polyurethanes, used in experimental stress analysis are usually represented by highly nonlinear relationships. In this paper, uniaxial and biaxial tensile tests on a polyurethane rubber are described and the results are analyzed introducing the new concept of “natural stress.” It has been found that the natural stress-natural strain relationship is linear up to 100 per cent strain and seems to correspond to an intrinsic property of the material. The isochromatic fringes are also shown to be linear with respect to natural stress and natural strain.

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References

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Authors and Affiliations

  1. Civil Engineering and Mechanics Department, The Catholic University of America, Washington, D. C.

    A. J. Durelli (Professor) & V. J. Parks (Associate Professor)

  2. Department of Engineering, U. S. Naval Academy, Annapolis, Md.

    V. J. Lopardo (Associate Professor)

Authors
  1. A. J. Durelli
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  2. V. J. Parks
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  3. V. J. Lopardo
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Durelli, A.J., Parks, V.J. & Lopardo, V.J. Natural stress used to obtain linear elastic and optical properties of a rubber under large strains. Experimental Mechanics 10, 240–244 (1970). https://doi.org/10.1007/BF02324096

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  • DOI: https://doi.org/10.1007/BF02324096

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