Unification of the Rheological Physics of Yield Stress Fluids.

The physics above and below the yield stress is unified by a simple model for viscoplasticity that accounts for the nonlinear rheology of multiple yield stress fluids. The model has a rate-dependent relaxation time, allows for plastic deformation below the yield stress, and indicates that rapid elastic deformation aids yielding. A range of commonly observed rheological behaviors are predicted, including the smooth overshoot in the loss modulus and the recently discovered contributions from recoverable and unrecoverable strains in amplitude sweeps.

Citation

Krutarth Kamani, Gavin J Donley, Simon A Rogers. Unification of the Rheological Physics of Yield Stress Fluids. Physical review letters. 2021 May 28;126(21):218002

PMID: 34114843

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