Tunable discontinuous shear thickening with magnetorheological suspensions
| Autor: | Yan Grasselli, Alain Meunier, Olga S. Volkova, Georges Bossis |
|---|---|
| Přispěvatelé: | Laboratoire de physique de la matière condensée (LPMC), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Dilatant
Materials science Mechanical Engineering Flow (psychology) magnetorheology Discontinuous shear thickening 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Stress (mechanics) Shear rate Condensed Matter::Soft Condensed Matter yield stress magnetic suspensions 0103 physical sciences Magnetorheological fluid [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] General Materials Science Composite material 010306 general physics 0210 nano-technology |
| Zdroj: | Journal of Intelligent Material Systems and Structures Journal of Intelligent Material Systems and Structures, SAGE Publications, 2017, pp.1-7. ⟨10.1177/1045389X17704915⟩ |
| ISSN: | 1045-389X 1530-8138 |
| DOI: | 10.1177/1045389X17704915⟩ |
| Popis: | International audience; Discontinuous shear thickening is a phenomenon observed in concentrated suspensions where, at a given applied stress, the flow becomes suddenly partially blocked and the shear rate begins to decrease and to oscillate when the stress is increased above the critical one. In this work, we show that it is possible to control with a magnetic field this abrupt transition from a flowing state to a jammed state, using a suspension of magnetic particles coated with a superplastifier molecule. In the case of experiments made at constant velocity, the transition to the jammed state corresponds to a very high jump of stress which can reach several hundred pascals for fields as low as a few kiloampere per meter. We present also results obtained in microgravity on a magnetic powder, showing that the solid friction between particles plays a key role in the jamming phenomenon. |
| Databáze: | OpenAIRE |
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