A new equipment to test elongation thickening of highly concentrated suspensions and comparison of elongational with shear results

J. Laven, J. Nakao

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

    Abstract

    With a newly designed uni-axial elongation equiment, elongation thickening of highly concentrated suspensions was investigated. The equipment can measure the total tensile force and the liquid-phase pressure in the suspension. This allows to analyse all network stresses, i.e. all inter-particle stresses. Fro comparing elongation and shear properties, a rotational shear rehometer was equipped with facilities to simultaneously measure viscosity, liquid-phase pressure and normal force. The critical elongation rate beyond which dilatancy occurs is about a factor 30 lower than the corresponding shear equivalent. Especially in elongation and also in shear, the liquid phase pressure of the suspension decreases beyond a critical range.
    Original languageEnglish
    Title of host publicationProceedings of the XIIIth international congress on rheology : Cambridge, UK, 20-25 August 2000
    Pages3-22-3-24
    Volume3
    Publication statusPublished - 2000
    EventXIIIth International Congress on Rheology - Cambridge, United Kingdom
    Duration: 20 Aug 200025 Aug 2000

    Conference

    ConferenceXIIIth International Congress on Rheology
    CountryUnited Kingdom
    CityCambridge
    Period20/08/0025/08/00

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    Laven, J., & Nakao, J. (2000). A new equipment to test elongation thickening of highly concentrated suspensions and comparison of elongational with shear results. In Proceedings of the XIIIth international congress on rheology : Cambridge, UK, 20-25 August 2000 (Vol. 3, pp. 3-22-3-24)