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Plastic behavior of some yield stress fluids: from creep to long-time yield

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Abstract

The yielding of several reversible yield stress fluids is studied during scissometric-like creep experiments. The temporal evolution of the apparent deformation is recorded for applied stresses close and below the usual yield stress. Similarly to solids, three main creep regimes are observed. First, a primary creep regime displaying a temporal power law evolution of the deformation rate occurs, followed by a temporal minimum, which leads to an apparent flow of the material. This local minimum, defined as the “transition time,” and the subsequent fluidization can be observed at long times. The evolution of this time as a function of the applied stress appears to follow a universal law reminiscent of fracture behavior in hard solids.

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Acknowledgements

We acknowledge fruitful discussions with Philippe Marchal and Daniel Quemada.

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Authors and Affiliations

  1. Laboratoire de Rhéologie, BP 53 Domaine Universitaire 1301 rue de la Piscine, 38041, Grenoble Cedex 9, France

    Francois Caton

  2. Laboratoire d’Energétique et de Mécanique Théorique et Appliquée, CNRS UMR 7563, 2 Avenue de la Forêt de Haye, B.P. 160, 54504, Vandoeuvre Cedex, France

    Christophe Baravian

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  1. Francois Caton
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  2. Christophe Baravian
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Correspondence to Francois Caton.

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Caton, F., Baravian, C. Plastic behavior of some yield stress fluids: from creep to long-time yield. Rheol Acta 47, 601–607 (2008). https://doi.org/10.1007/s00397-008-0267-2

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  • DOI: https://doi.org/10.1007/s00397-008-0267-2

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