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Biaxial-stress results for nylon

Paper reports biaxial-stress data for nylon and indicates that these data can be correlated with existing strength theories for elastic behavior

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Abstract

Tubular-shaped nylon specimens were tested at room temperature under tension-tension and tension-compression stresses. The principal stress ratio for small strains was essentially constant during a test, and effective strain rates from test to test did not vary significantly. The biaxial-stress data for small strains are compared with stress predictions for the maximum-distortion-energy and maximum-strain-energy theories. For these comparisons, the stress data were determined using biaxial-strain data and strain expressions which are proposed for each theory. Agreement between the stress data and predictions for both theories are good for 1 percent effective strain.

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Abbreviations

ε o :

effective strain

ε r :

radial strain at OD surface of tubular specimen

ε l :

tangential strain at OD surface

ε z :

axial strain at OD surface

μ:

Poisson's ratio

σ o :

effective stress

σ l :

tangential stress at OD surface

σ z :

axial stress, assumed uniform in axial direction

References

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  3. Ely, R. E., “Biaxial Stress Testing of Acrylic Tube Specimens,”Poly. Sci. & Eng.,7 (1),40 (1967).

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  4. O'Toole, J. L., andvan Toerne, T. R., “Effect of Environment on Design Properties of Nylon,”Machine Design,34 (16),143 (1962).

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Authors and Affiliations

  1. Physical Sciences Laboratory Research and Development Directorate, U. S. Army Missile Command, Redstone Arsenal, Ala.

    Richard E. Ely (Supervisory Research Aerospace Engineer)

Authors
  1. Richard E. Ely
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Ely, R.E. Biaxial-stress results for nylon. Experimental Mechanics 8, 267–271 (1968). https://doi.org/10.1007/BF02327023

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  • DOI: https://doi.org/10.1007/BF02327023

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