Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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On the congruence of some network and pom-pom models

  • Tanner, Roger I. (School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney)
  • Published : 2006.03.01
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Abstract

We show that some network and pom-pom constitutive models are essentially the same. Instead of the usual confrontation, we suggest that the two approaches can offer useful mutual support: vital information about network destruction rates found from detailed pom-pom calculations can be used to improve the network models, while deductions about network creation rates can pinpoint areas needing further attention in the tube modelling area. A new form of the PTT model, the PTT-X model, results in improved shear and elongational flow descriptions, plus an improved recoil behaviour. The remaining problems of strain-time separation, second normal stress difference description, and reduction of parameters are also discussed and some suggestions for progress are offered.

Keywords

References

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