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Strain hardening of fractal colloidal gels
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Gisler, T., Ball, Robin and Weitz, D. A. (1999) Strain hardening of fractal colloidal gels. Physical Review Letters, Vol.82 (No.5). pp. 1064-1067. doi:10.1103/PhysRevLett.82.1064 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.82.1064
Abstract
We report on experiments on the rheology of gels formed by diffusion-limited aggregation of neutrally buoyant colloidal particles. These gels form very weak solids, with the elastic modulus, G'(omega), larger than the loss modulus, G "(omega), and with both G'(omega) and G "(omega) exhibiting only a very weak frequency dependence. Upon small but finite strains gamma < 0.45 the elastic modulus increases roughly exponentially with gamma(2). We explain the observed strain hardening with the highly nonlinear elastic response of the rigid backbone of the gel to elongational deformation.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Colloids, Strain hardening, Fractals, Rheology | ||||
Journal or Publication Title: | Physical Review Letters | ||||
Publisher: | American Physical Society | ||||
ISSN: | 0031-9007 | ||||
Official Date: | 1 February 1999 | ||||
Dates: |
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Volume: | Vol.82 | ||||
Number: | No.5 | ||||
Number of Pages: | 4 | ||||
Page Range: | pp. 1064-1067 | ||||
DOI: | 10.1103/PhysRevLett.82.1064 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published |
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