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Rheology pp 327-332 | Cite as

Stretching the Jeffreys Liquid: Stressing, Creep and Recovery

  • K. Missaghi
  • C. J. S. Petrie

Abstract

The work described here forms part of a larger programme aimed at establishing qualitative features of the response of simple elasticoviscous models in elongational flows. Here we concentrate on the effect of the retardation time and on comparison of the Jeffreys liquid with the Maxwell liquid. In the numerical computations we have chosen parameters which give predictions similar to the results of Laun and Mlinstedt (1976), although we do not expect the simple four-parameter model to give a good quantitative fit to the data. Attention is confined to homogeneous uniaxial elongation, with either the rate of strain or the stress held constant.

Keywords

Retardation Time Maxwell Model Elongational Viscosity Elongational Flow Recoverable Strain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. P. K. Agrawal, W. K. Lee, J. M. Lorntson, C. I. Richardson, K. F. Wissbrun and A. B. Metzner (1977), Rheological behaviour of molten -polymers in shearing and in extensional flows, Trans. Soc. Rheol., 21, 355–379.CrossRefGoogle Scholar
  2. H. M. Laun and H. Münstedt (1976), Comparison of the elongational behaviour of a polyethylene melt at constant stress and constant strain rate, Rheol. Acta, 15, 517–524.CrossRefGoogle Scholar
  3. C. J. S. Petrie (1977), On stretching Maxwell models, J. Non-Newtonian Fluid Mechanics, 2, 221–253.CrossRefGoogle Scholar
  4. C. J. S. Petrie (1979), Elongational Flows, Pitman Publishing, London.Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • K. Missaghi
    • 1
  • C. J. S. Petrie
    • 1
  1. 1.Department of Engineering MathematicsUniversity of Newcastle upon TyneEngland

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