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Compressive consolidation of strongly aggregated particle gels

Seto, Ryohei and Botet, Robert and Meireles, Martine and Auernhammer, Günter K. and Cabane, Bernard Compressive consolidation of strongly aggregated particle gels. (2013) Journal of Rheology, vol. 57 (n° 5). pp. 1347-1365. ISSN 0148-6055

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Official URL: http://dx.doi.org/10.1122/1.4817436

Abstract

The compressive yield stress of particle gels shows a highly nonlinear dependence on the packing fraction. We have studied continuous compression processes and discussed the packing-fraction dependence with the particle-scale rearrangements. The two-dimensional simulation of uniaxial compression was applied to fractal networks, and the required compressive stresses were evaluated for a wide range of packing fractions that approached close packing. The compression acts to reduce the size of the characteristic structural entities (i.e., the correlation length of the structure). We observed three stages of compression: (I) Elastic-dominant regime; (II) single-mode plastic regime, where the network strengths are determined by the typical length scale and the rolling mode; and (III) multimode plastic regime, where sliding mode and connection breaks are important. We also investigated the way of losing the fractal correlation under compression. It turns out that both fractal dimension Df and correlation length ξ start to change from the early stage of compression, which is different from the usual assumption in theoretical models.

Item Type:Article
Additional Information:Thanks to AIPs editor. The original PDF can be found at Journal of Rheology website: http://scitation.aip.org/content/sor/journal/jor2/57/5/10.1122/1.4817436
HAL Id:hal-00877233
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Supérieure de Physique et de Chimie Industrielles - ESPCI (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Max Planck Society (GERMANY)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS (FRANCE)
Other partners > City University of New-York - CUNY (USA)
Other partners > Université Paris-Sud 11 (FRANCE)
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Deposited By: Vincent GERBAUD
Deposited On:28 Oct 2013 08:43

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