Characterizing the non-linear rheology of biopolymer networks using inertio-elastic oscillations

Citation:

Yao, N. Y. ; Larsen, R. J. ; Weitz, D. A. Characterizing the non-linear rheology of biopolymer networks using inertio-elastic oscillations. In Xvth International Congress on Rheology - the Society of Rheology 80th Annual Meeting, Pts 1 and 2; Co, A. ; Leal, L. G. ; Colby, R. H. ; Giacomin, A. J., Ed. 2008; Vol. 1027, pp. 621-623. Copy at http://www.tinyurl.com/mxajodn

Abstract:

Accurately characterizing the non-linear rheological properties of materials remains a challenge. Although there exist a variety of methods to probe non-linear properties, there is no consensus regarding their unique advantages. Inertio-elastic oscillations occur naturally in rotational rheometry as a consequence of a material's elasticity and the inertia of the rheometer's bearing. We demonstrate that extending this technique to non-linear deformations provides accurate measurements of non-linear material properties. Our experiments are performed on biopolymer networks, which are well-characterized, and have dramatic non-linear properties that are biologically significant. We compare these inertio-elastic results to other standard methods of probing non-linear rheology. For fibrin networks, our measurements suggest that inertio-elastic oscillations provide the most straightforward method of distinguishing between non-linear elasticity and dissipation at any given stress. In addition, we show that inertio-elastic oscillations provide the most accurate noise-free generalization of non-linear dissipation for a viscoelastic solid.

Notes:

Times Cited: 0 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology Aug 03-08, 2008 Monterey, CA Soc Rheol