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Updated: Jun 26, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Influence of boundary conditions on yielding in a soft glassy material
Thomas Gibaud1, Catherine Barentin, Sébastien Manneville
1Laboratoire de Physique, Université de Lyon, Ecole Normale Supérieure de Lyon, CNRS UMR 5672 46 allée d'Italie, 69364 Lyon cedex 07, France.
Abstract:
The yielding behavior of a sheared Laponite suspension is investigated within a 1 mm gap under two different boundary conditions. No-slip conditions, ensured by using rough walls, lead to shear localization as already reported in various soft glassy materials. When apparent wall slip is allowed using a smooth geometry, the sample breaks up into macroscopic solid pieces that get slowly eroded by the surrounding fluidized material up to the point where the whole sample is fluid. Such a drastic effect of boundary conditions on yielding suggests the existence of some macroscopic characteristic length that could be connected to cooperativity effects in jammed materials under shear.
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