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van Dooren, K.S. (author)The aeronautical industry has set ambitious goals to reduce its environmental impact and become sustainable. Addressing rising emissions involves strategies such as reducing structural weight, due to its direct impact on fuel consumption, and the use of new materials and manufacturing techniques. Research and development on thermoplastic...doctoral thesis 2024
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Westerveld, Timo (author)The effect of creating parallel welds in a single overlap using continuous ultrasonic welding on the weld quality has been investigated, with the goal of creating three high-quality parallel welds. To achieve this, multiple aspects were examined to understand the creation of high-quality parallel welds. The weld quality is highly influenced by a...master thesis 2024
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Malladi, Avyadhish (author)This thesis project focuses on the evaluation of the Extended Finite Element Model (XFEM) for modelling skin-stringer separation in thermoplastic composite stiffened panels. The study uses test results from a reference study in the literature on a PEKK-FC carbon composite panel with three stringers joined to the skin using a short-fibre...master thesis 2024
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de Grijff, Danny (author)The ever-growing demand for high-performance materials and more functional 3D printing has raised tremendous interest in advancing Multi-Material Additive Manufacturing (MMAM). Developing C-FRTP 3D printing through FDM Technology opens new scalable FRP solutions. These components possess exceptional properties such as specific strength,...master thesis 2024
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Fang, G. (author), Zhang, Tianyu (author), Huang, Yuming (author), Zhang, Zhizhou (author), Masania, K. (author), Wang, C.C. (author)This work explores a spatial printing method to fabricate continuous fiber-reinforced thermoplastic composites (CFRTPCs), which can achieve exceptional mechanical performance. For models giving complex 3D stress distribution under loads, typical planar-layer based fiber placement usually fails to provide sufficient reinforcement due to their...journal article 2024
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Werlen, Vincent (author), Rytka, Christian (author), Dransfeld, C.A. (author), Brauner, Christian (author), Michaud, Véronique (author)Modeling the consolidation of fiber-reinforced thermoplastic composites at the part level presents a formidable computational challenge due to the multi-scale nature of the process. In this article, a method to bypass the multi-scale problem by homogenizing the micro scale and describing the medium with characteristic parameters is described....journal article 2024
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Paz Mendez, J. (author), Raimondo, A. (author), Bisagni, C. (author)In this research, conduction welded C-struts, part of a thermoplastic composite fuselage designed and manufactured in the framework of the Clean Sky 2 STUNNING project, are investigated. Five specimens made of two C-section profiles are manufactured and welded using conduction welding in three different configurations with variations in the...journal article 2024
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Galiana, Shankar (author), Moradi, M. (author), Wierach, Peter (author), Zarouchas, D. (author)Acousto-ultrasonic composite transducers (AUCTs), comprising piezoceramic materials in a reinforced polymeric matrix, show promise for structural health monitoring in composite structures. Challenges arise when integrating AUCTs onto highly loaded thermoplastic composites, especially low-surface-energy materials like polyaryletherketone...journal article 2024
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Yaghoubi Nasrabadi, V. (author), Kumru, B. (author)Over the past 30 years, the polymer composite industry has flourished, producing advanced structural materials for the aviation, energy, and transportation sectors. However, the use of crosslinked thermoset matrices has been linked to significant end-of-life challenges, presenting a critical issue for the industry. Moreover, the industry is...journal article 2024
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van Dooren, Kevin (author), Waleson, Jan (author), Chapman, Mark (author), Bisagni, C. (author)Two curved thermoplastic composite multi-stringer panels with roller boundary conditions are analysed and tested to investigate the buckling and failure behaviour. The panels are made of AS4D/PEKK-FC thermoplastic composite, have five stringers with an angled cap on the side and are joined to the skin with the short-fibre reinforced butt...journal article 2024
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Bakshi, Jaskrit (author)Having seen exponential growth in demand for air travel, the aviation industry has found itself trying to find a balance between economic growth, technological development, and environmental sustainability. This saw a shift in attention towards materials such as fiber reinforced composites, predominantly thermoset in the past with higher...master thesis 2023
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Arblaster, Thomas (author)Emerging in the domain of composite manufacturing, thermoplastic polymers can enable the reduction of process times, costs, and waste. In this study, lifecycle assessment (LCA) is used to evaluate a design for a carbon fibre-reinforced thermoplastic (CFRTP) wing rib, made from carbon fibre and polyetherketoneketone (CF/PEKK). The CF/PEKK rib is...master thesis 2023
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Agarwal, Sovit (author)Increasing demands for composite structures and sustainability goals have resulted in the growth of thermoplastic polymer matrix composites and automated manufacturing technologies. The in-situ Automated Fiber Placement (AFP) manufacturing of thermoplastic prepreg tapes has the potential to provide a fast and cost-effective manufacturing...master thesis 2023
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Lonis, Sam (author)Thermoplastic composite materials are increasingly used in aircraft construction due to their high-mechanical properties, toughness, rapid processing rates and reprocessing possibilities at their end-of-life. In the production thermoplastic composite parts, 10-40% of the material remains unused, so-called production waste. Despite being a high...master thesis 2023
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HARIHARAN, RAJNEESH (author)Delamination is a significant failure mode that has been the subject of extensive research in laminated structures. The interface in assembly structures often represents the susceptibly weak link and necessitates careful consideration to guarantee structural stability. It is of utmost significance to understand the behaviour of the delamination...master thesis 2023
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van Winden, Dave (author)Laser-assisted fiber placement (LAFP) is an automated manufacturing technique with promising potential to produce larger aerospace structural components using thermoplastic composites. However, during the rapid heating phase, deconsolidation of composite tapes can occur, resulting in negative effects on bond forming ability. This study aimed to...master thesis 2023
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Tijs, B.H.A.H. (author)Thermoplastic composites enable new manufacturing techniques such as conduction welding to make the aviation industry more sustainable, while at the same time, provide great benefits to cost-efficient high-volume production. One of the benefits of welding is that it reduces the amount of mechanical fasteners required. Fastener-free joining also...doctoral thesis 2023
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Iványi, Charlotte (author)Laser-assisted fiber placement (LAFP) is a promising manufacturing process for thermoplastic composites (TPCs), which enables out-of-autoclave production and eliminates post-consolidation steps. In LAFP, thermoplastic carbon fiber tapes are heated with a laser heat source and placed into the desired layup with the help of a robot, while being...master thesis 2023
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Kim, Nam Kyeun (author), Bhattacharyya, Debes (author), van Loosdrecht, Mark C.M. (author), Lin, Y. (author)In the present research, a bio-based flame retardant (FR) was prepared using a biopolymer derived from wastewater sludge to improve the fire performance of polypropylene (PP). Extracellular polymeric substances (EPS), which were extracted from wastewater aerobic granular sludge, were absorbed into cellulose-based fibres, such as flax and...journal article 2023
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Quan, D. (author), Ma, Yannan (author), Yue, Dongsheng (author), Liu, Jiaming (author), Xing, Jun (author), Zhang, Mingming (author), Alderliesten, R.C. (author), Zhao, Guoqun (author)In this study, an aerospace thermosetting composite was co-curing joined by Polyether-ether-ketone (PEEK) and Polyethylenimine (PEI) films, with an aim of developing advanced composite joints. The semi-crystalline PEEK films were surface activated upon a UV-irradiation technique to obtain a strong film–composite interface, while the amorphous...journal article 2023