In-Plane Shear Characterisation of Uni-Directionally Reinforced Thermoplastic Melts

S.P. Haanappel, R. ten Thije, U. Sachs, A.D. Rietman, R. Akkerman

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    48 Downloads (Pure)

    Abstract

    Intra‐ply shear is an important mechanism in hot stamp forming processes of UD fibre reinforced thermoplastic laminates. Various methods have been developed to characterise this shear mechanism, but measured properties may differ for several orders of magnitude. Therefore, an alternative method to characterise the longitudinal shearing viscosity is presented. Straight fibre reinforced thermoplastic bars with a rectangular cross section are subjected to torsional loadings. The specimens' response can be used to characterise the shear properties of the fibre reinforced polymer melt. Different geometries and clamping conditions were modelled to show the sensitivity of the measured viscosity. Based on this, experiments were performed with thick bars with a PEI‐AS4 and PEEK‐AS4 composition. Frequency sweeps were applied at different temperatures. All measurements showed a clear shear thinning behaviour, which can conveniently be described with a power law model.
    Original languageEnglish
    Title of host publicationThe 14th International ESAFORM Conference on Material Forming 2011
    Subtitle of host publicationproceedings
    EditorsGary Menary
    PublisherAIP Publishing LLC
    Pages930-935
    ISBN (Print)978-0-7354-091
    DOIs
    Publication statusPublished - 2011
    EventESAFORM 2011: 14th International Conference on Material Forming - Queen's University Belfast, Belfast, United Kingdom
    Duration: 27 Apr 201129 Apr 2011
    Conference number: 14

    Conference

    ConferenceESAFORM 2011
    Abbreviated titleESAFORM
    CountryUnited Kingdom
    CityBelfast
    Period27/04/1129/04/11

    Keywords

    • Intra-ply shear
    • Thermoplastic
    • Melts
    • Viscosity
    • Uni-directional
    • Laminates
    • Rectangular bar
    • Torsion
    • Rheometer

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