Compressive consolidation of strongly aggregated particle gels

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.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-00877233
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, October 28, 2013 - 9:43:04 AM
Last modification on : Friday, October 11, 2019 - 8:22:32 PM
Long-term archiving on : Friday, April 7, 2017 - 6:05:39 PM

File

Ryohei_9938.pdf
Files produced by the author(s)

Identifiers

Citation

Ryohei Seto, Robert Botet, Martine Meireles, Günter K. Auernhammer, Bernard Cabane. Compressive consolidation of strongly aggregated particle gels. Journal of rheology, American Institute of Physics, 2013, vol. 57, pp. 1347-1365. ⟨10.1122/1.4817436⟩. ⟨hal-00877233⟩

Share

Metrics

Record views

340

Files downloads

306