Rheologica Acta

, Volume 41, Issue 1, pp 180–192

Viscoelastic properties of pig kidney in shear, experimental results and modelling

  • Simin Nasseri
  • Lynne E. Bilston
  • Nhan Phan-Thien
ORIGINAL CONTRIBUTION

DOI: 10.1007/s003970200017

Cite this article as:
Nasseri, S., Bilston, L. & Phan-Thien, N. Rheol. Acta (2002) 41: 180. doi:10.1007/s003970200017

Abstract

 In this paper, the results from a series of rheological tests of fresh pig kidney have been reported. Using a standard strain-controlled rheometer, the oscillation strain sweep experiment showed a linear viscoelastic strain limit of the order of 0.2% strain. To determine the components of dynamic moduli in terms of frequency, shear oscillation tests were done at strain 0.2% using a stress-controlled rheometer. Shear stress relaxation tests were carried out with a fixed strain of 0.2% and 0.02 s rise time. The model we have developed uses a multi-mode upper convected Maxwell (UCM) model with variable viscosities and time constants, to which we have added a Mooney hyper-elastic response, both multiplied by a damping function. Different forms of damping functions that control the non-linearity of strain-stress profile have been tested. The model was fitted to our experimental data, and matched the entire test data reasonably well with a single set of parameters.

Key words RheologyBiomechanicsViscoelasticityKidney tissue

Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Simin Nasseri
    • 1
  • Lynne E. Bilston
    • 1
  • Nhan Phan-Thien
    • 1
  1. 1.School of Aerospace Mechanical and Mechatronic Engineering The University of Sydney N.S.W., 2006, Australia e-mail: bilston@mech.eng.usyd.edu.auAU