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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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Wijskamp, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2025Critical evaluation of torsion rheometry to characterize the anisotropic intraply shear resistance of unidirectional thermoplastic composites in meltcitations
- 2024A state-rate model for the transient wall slip effects in ply-ply friction of UD C/PAEK tapes in melt
- 2024Prediction of the in-plane permeability and air evacuation time of fiber-placed thermoplastic composite preforms with engineered intertape channelscitations
- 2023Modeling the effect of temperature and pressure on the peak and steady-state ply-ply friction response for UD C/PAEK tapescitations
- 2023Corrigendum to “Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes” [Compos. Part A
- 2022Characterization of the water–titanium interaction and its effect on the adhesion of titanium-C/PEKK jointscitations
- 2022Formability Experiments for Unidirectional Thermoplastic Compositescitations
- 2022In-Plane Shear Characterization of Unidirectional Fiber Reinforced Thermoplastic Tape Using the Bias Extension Methodcitations
- 2022The relation between in-plane fiber waviness severity and first ply failure in thermoplastic composite laminatescitations
- 2022The role of process induced polymer morphology on the fracture toughness of titanium-PEKK interfacescitations
- 2022Prediction of the peak and steady-state ply-ply friction response for UD C/PAEK tapescitations
- 2018Rapid Manufacturing of a Tailored Spar by AFP and Stamp Forming
- 2017Fibre length distribution of shredded thermoplastic composite scrap
- 2010Weld strength assessment for tape placementcitations
- 2006An integral process model for high precision composite forming
Places of action
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article
The role of process induced polymer morphology on the fracture toughness of titanium-PEKK interfaces
Abstract
The effect of the degree of crystallinity on the fracture toughness of titanium–PEKK interfaces was investigated experimentally. The level of crystallinity at the interface was varied by employing different processes commonly used in aerospace, namely autoclave consolidation, press-forming and annealing. The fracture toughness was assessed via the Double Cantilever Beam test, while the polymer degree of crystallinity was evaluated via Differential Scanning Calorimetry. Fracture surfaces were analyzed using confocal microscopy, SEM and AFM, to correlate the degree of crystallinity to the failure mechanisms and the toughness. The samples with a high degree of crystallinity exhibited a lower fracture toughness and a dominant cohesive failure, consisting of a combination of brittle fracture of the spherulites, and ductile fracture of the amorphous regions between the spherulites. Lowering the degree of crystallinity led to a higher fracture toughness, due to extensive plastic deformation of the amorphous polymer. In addition, fractography showed a transition from cohesive to interfacial failure in the case of a low degree of crystallinity. Our results show that the crystalline structure of the polymer has to be taken into account when optimizing the performance of metal–composite hybrid joints based on thermoplastic matrices.