Stress enhancement in the delayed yielding of colloidal gels
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 106, no 24, 248303- p.Article in journal (Refereed) PublishedText
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.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:liu:diva-125205DOI: 10.1103/PhysRevLett.106.248303PubMedID: 21770607OAI: oai:DiVA.org:liu-125205DiVA: diva2:903633