An ontology for large amplitude oscillatory shear flow

Randy H. Ewoldt, A. E. Hosoi, Gareth H. McKinley

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Characterizing purely elastic or purely viscous rheological nonlinearities is straightforward. However, a comprehensive framework does not exist to characterize materials which exhibit both modes of nonlinearity simultaneously. We develop a descriptive language and set of unambiguous material measures for quantifying the nonlinear viscoelastic response of materials subjected to large amplitude oscillatory shear (LAOS) deformation, enabling us to develop a unique "rheological fingerprint" of an a priori unknown substance. We examine two representative soft materials with our framework; the new material measures clearly reveal properties such as local strain-stiffening which are obscured by conventional means. Our technique is universally applicable to any complex material and provides a test bed for new and existing constitutive models.

Original languageEnglish (US)
Title of host publicationThe XVth International Congress on Rheology - The Society of Rheology 80th Annual Meeting
Number of pages3
StatePublished - 2008
Externally publishedYes
Event15th International Congress on Rheology - Monterey, CA, United States
Duration: Aug 3 2008Aug 8 2008

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other15th International Congress on Rheology
CountryUnited States
CityMonterey, CA


  • Cliebysliev polynomial
  • FT rheology
  • LAOS
  • Nonlinear viscoelasticity
  • Softening
  • Stiffening
  • Thickening
  • Thinning

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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