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Stress enhancement in the delayed yielding of colloidal gels
Harvard University, Cambridge,USA. (SEAS)
Harvard University, Cambridge, USA. (SEAS)ORCID iD: 0000-0002-1503-8293
Harvard University, Cambridge, USA. (SEAS)
Harvard University. (SEAS)
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 106, no 24, 248303- p.Article in journal (Refereed) PublishedText
Abstract [en]

Networks of aggregated colloidal particles are solidlike and can sustain an applied shear stress while exhibiting little or no creep; however, ultimately they will catastrophically fail. We show that the time delay for this yielding decreases in two distinct exponential regimes with applied stress. This behavior is universal and found for a variety of colloidal gel systems. We present a bond-rupture model that quantitatively describes this behavior and highlights the role of mesoscopic structures. Our result gives new insight into the nature of yielding in these soft solid materials.

Place, publisher, year, edition, pages
2011. Vol. 106, no 24, 248303- p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:liu:diva-125205DOI: 10.1103/PhysRevLett.106.248303PubMedID: 21770607OAI: diva2:903633
Available from: 2016-02-16 Created: 2016-02-16 Last updated: 2016-02-29

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Lindström, Stefan B
Condensed Matter Physics

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