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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Haanappel, S. P.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2025Critical evaluation of torsion rheometry to characterize the anisotropic intraply shear resistance of unidirectional thermoplastic composites in meltcitations
- 2018History and future of composites forming analysiscitations
- 2016Stamp forming optimization for formability and crystallinitycitations
- 2015Thermoplastic composites manufacturing by thermoformingcitations
- 2014Formability analyses of uni-directional and textile reinforced thermoplasticscitations
- 2014Shear characterisation of uni-directional fibre reinforced thermoplastic melts by means of torsioncitations
- 2014Bending characterization of UD compositescitations
- 2013Formability of fiber-reinforced thermoplastics in hot press forming process based on friction propertiescitations
- 2012Forming of Thermoplastic Compositescitations
- 2012Forming simulation sensitivity study of the double-dome benchmark geometrycitations
- 2011In-Plane Shear Characterisation of Uni-Directionally Reinforced Thermoplastic Meltscitations
- 2011Friction in Forming of UD Compositescitations
- 2010Constitutive modelling of UD reinforced thermoplastic laminates
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document
Stamp forming optimization for formability and crystallinity
Abstract
The stamp forming process is well suited for high volume production of thermoplastic composite parts. The process can be characterized as highly non-isothermal as it involves local quench-cooling of a molten thermoplastic composite blank where it makes contact with colder tooling. The formability of the thermoplastic composite depends on the viscoelastic material behavior of the matrix material, which is sensitive to temperature and degree of crystallinity. An experimental study was performed to determine the effect of temperature and crystallinity on the storage modulus during cooling for a woven glass fiber polyamide-6 composite material. An increase of two decades in modulus was observed during crystallization. As this will significantly impede the blank formability, the onset of crystallization effectively governs the time available for forming. Besides the experimental work, a numerical model is developed to study the temperature and crystallinity throughout the stamp forming process. A process window can be determined by feeding the model with the experimentally obtained data on crystallization.