| People | Locations | Statistics |
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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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Lévy, Arthur
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Microstructural analysis of unidirectional composites: a comparison of data reduction schemes
- 2024Carbon fibre paek prepreg micrograph analysis using weka deep learning methodology
- 2023Welding of high-performance thermoplastics and composites: from material properties tomechanical strength of assemblies
- 2023Characterization of driving mechanisms involved in deconsolidation of thermoplastic composite laminates
- 2022Effects of heat transfer coefficient variations on composite curingcitations
- 2022Thick thermoplastic composite laminate consolidation: Experimental observations and numerical approachescitations
- 2022Online characterization of fiber-reinforced thermoplastic composite deconsolidation
- 2021Coalescence in fused filament fabrication process: thermo-dependent characterization of high-performance polymer propertiescitations
- 2021Composite manufacturing processes: modeling, characterization and monitoring for a better control of final quality
- 2021Experimental correlation of rheological relaxation and interface healing times in welding thermoplastic PEKK compositescitations
- 2020Adhesion of High Temperature Thermoplastic Compositescitations
- 2019Vacuum-bagged composite laminate forming processes: Predicting thickness deviation in complex shapescitations
- 2018A study on amplitude transmission in ultrasonic welding of thermoplastic compositescitations
- 2018A study on amplitude transmission in ultrasonic welding of thermoplastic compositescitations
- 2018Out-of-Autoclave Prepreg Processingcitations
- 2017On the Alternate Direction Implicit (ADI) Method for Solving Heat Transfer in Composite Stampingcitations
- 2017Compression molding of Carbon/Polyether ether ketone composites: Squeeze flow behavior of unidirectional and randomly oriented strandscitations
- 2016Compression moulding of Carbon/PEEK Randomly-Oriented Strands composites: A 2D Finite Element model to predict the squeeze flow behaviourcitations
- 2015Interstrand Void Content evolution in compression moulding of Randomly Oriented Strands (ROS) of thermoplastic composites
- 2014Ultrasonic welding of thermoplastic composites: a numerical analysis at the mesoscopic scale relating processing parameters, flow of polymer and quality of adhesioncitations
- 2014Modeling of the heating phenomena in ultrasonic welding of thermoplastic composites with flat energy directorscitations
- 2011Ultrasonic Welding of Thermoplastic Composites, Modeling of the Process Using Time Homogenization.citations
- 2011A level set based approach for the finite element simulation of a forming process involving multiphysics coupling: Ultrasonic welding of thermoplastic compositescitations
- 2010Modeling and simulation of vibrating flow. Application to the ultrasonic welding of thermoplastic matrix composites.
- 2009Développement d'un code éléments finis pour simuler le soudage par ultrasons de matériaux composites = Development of a Finite element code for simulating the ultrasonic welding of composite materials
- 2008Ultrasonic Welding of Thermoplastic Composites, Modeling and Simulation of the Process
- 2008Ultrasonic welding of thermoplastic composites, modeling of the processcitations
Places of action
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document
Adhesion of High Temperature Thermoplastic Composites
Abstract
Thermoplastic composites offer new manufacturing prospects, thanks to the ability to melt the matrix. Welding, tape placement, 3D printing, overmoulding, or even stamping involve adhesion of the thermoplastic polymer at high temperature. One of the leading mechanism that enable to build up strength of adherent over the substrate is called healing. It is classically described as the diffusion of the macromolecular chains across the interface that enable bridging. In continuous processes, such as some which are used in advanced manufacturing of aerospace structures, cycle times are very short. Thus, it is unclear how suitable these materials are for fast continuous processesthe limiting factor being the time required to gain adhesion. In order to model and predict such processes, a controlled welding bench was designed enabling very short welding times (~5 seconds). The mechanical adhesion between coupons was assessed by fracture of the welded interface via double cantilever beam fracture test. The welding kinetics were observed for the initial stages of healing with a behavior that should fit the 1/2 trend. From this, it was possible to compare the accuracy and repeatability of interface healing at short time scales to that of samples which were closer to fully welded. Concurrently, the reptation of the polymer melt was assessed on a commercial rheometer, by computing relaxation time from the viscoelastic response. The correlation confirms that the mechanical quality is associated with the macromolecule diffusion. It was also observed that for high temperature thermoplastics, reticulation occurs, which inhibits molecular diffusion and increases the relaxation time. The major implication is that the preprocessing of the polymer will impact the subsequent adhesion step. For example, plates processed with an autoclave for a couple of hours would require a welding time an order of magnitude longer than the adhesion of a virgin prepreg in the tape placement process.