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Creep in Colloidal Glasses

Siebenbürger, M. and Ballauff, M. and Voigtmann, Th. (2012) Creep in Colloidal Glasses. Physical Review Letters, 108, p. 255701. DOI: 10.1103/PhysRevLett.108.255701.

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Official URL: http://prl.aps.org/abstract/PRL/v108/i25/e255701


We investigate the nonlinear response to shear stress of a colloidal hard-sphere glass, identifying several regimes depending on time, sample age, and the magnitude of applied stress. This emphasizes a connection between stress-imposed deformation of soft and hard matter, in particular, colloidal and metallic systems. A generalized Maxwell model rationalizes logarithmic creep for long times and low stresses. We identify diverging time scales approaching a critical yield stress. At intermediate times, strong aging effects are seen, which we link to a stress overshoot seen in stress-strain curves.

Document Type:Article
Title:Creep in Colloidal Glasses
AuthorsInstitution or Email of Authors
Siebenbürger, M.HZ Berlin
Ballauff, M.HZ Berlin
Voigtmann, Th.thomas.voigtmann@dlr.de
Date:18 June 2012
Journal or Publication Title:Physical Review Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:p. 255701
Keywords:rheology, creep, amorphous solids, yield stress
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Dr.rer.nat. Thomas Voigtmann
Deposited On:20 Jun 2012 12:17
Last Modified:07 Feb 2013 20:39

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