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Brittle solid collapse to simple liquid for a waxy suspension

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Abstract

We show that thanks to the existence of a continuous (percolating) network of weak interparticle bonds in a liquid, wax suspensions behave as “soft breakable (brittle) solids”. It appears that, under the action of either a large stress over a short time or oscillating low stress (fatigue test), the initially solid network of these materials is broken and dispersed in the liquid, which makes them turn abruptly (“collapse”) and irreversibly into a low viscous fluid. This collapse is more dramatic as the concentration increases. These phenomena are related to the evolution of the microstructure directly observed after different flow histories. The interpretation of these results provides new perspectives for understanding the physical origin of the brittleness or plasticity of solid or pasty materials, and suggests such materials might be used as model systems to simulate and explain natural catastrophic events such as landslides and avalanches.

Graphical abstract: Brittle solid collapse to simple liquid for a waxy suspension

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Publication details

The article was received on 26 Jul 2019, accepted on 26 Sep 2019 and first published on 01 Oct 2019


Article type: Paper
DOI: 10.1039/C9SM01517E
Soft Matter, 2019, Advance Article

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    Brittle solid collapse to simple liquid for a waxy suspension

    D. E. V. Andrade and P. Coussot, Soft Matter, 2019, Advance Article , DOI: 10.1039/C9SM01517E

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