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 language | English |
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Title of host publication | The 14th International ESAFORM Conference on Material Forming 2011 |
Subtitle of host publication | proceedings |
Editors | Gary Menary |
Publisher | American Institute of Physics |
Pages | 930-935 |
ISBN (Print) | 978-0-7354-091 |
DOIs | |
Publication status | Published - 2011 |
Event | ESAFORM 2011: 14th International Conference on Material Forming - Queen's University Belfast, Belfast, United Kingdom Duration: 27 Apr 2011 → 29 Apr 2011 Conference number: 14 |
Conference
Conference | ESAFORM 2011 |
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Abbreviated title | ESAFORM |
Country/Territory | United Kingdom |
City | Belfast |
Period | 27/04/11 → 29/04/11 |
Keywords
- Intra-ply shear
- Thermoplastic
- Melts
- Viscosity
- Uni-directional
- Laminates
- Rectangular bar
- Torsion
- Rheometer