Fingerprinting Soft Materials: A Framework for Characterizing Nonlinear Viscoelasticity

Details Fingerprinting Soft Materials: A Framework for Characterizing Nonlinear Viscoelasticity Fingerprinting Soft Materials: A Framework for Characterizing Nonlinear Viscoelasticity

2007-10-29

arxiv.org/abs/0710.5509v1

Ewoldt, R. H., A. E. Hosoi and G. H. McKinley, "New measures for characterizing nonlinear viscoelasticity in large amplitude o

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 3 figures, full-page double-space preprint format

Scientific paper

10.1122/1.2970095

We introduce a comprehensive scheme to physically quantify both viscous and elastic rheological nonlinearities simultaneously, using an imposed large amplitude oscillatory shear (LAOS) strain. The new framework naturally lends a physical interpretation to commonly reported Fourier coefficients of the nonlinear stress response. Additionally, we address the ambiguities inherent in the standard definitions of viscoelastic moduli when extended into the nonlinear regime, and define new measures which reveal behavior that is obscured by conventional techniques.

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