Mathieu Vinot's research while affiliated with Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth and other places

Publications (31)

Conference Paper
Laminar technology provides tools to reduce the specific fuel burn of aircraft. Promising results give the hybrid laminar flow control (HLFC) technology. Together with efficient flying, bird strike tolerance is mandatory for safety reasons. The current work considers HLFC in horizontal stabiliser leading edges with a multi-chambered structure. The...
Conference Paper
Impact with large-scale projectiles like birds needs analyses at full-scale. The reason is that the impact behaviour can yet not be scaled from small-size demonstrators. The impact studies presented here aim to analyse hybrid laminar flow control (HLFC) structures for stabilizer or wing leading edges. To mature HLFC technology, impact requirements...
Conference Paper
Railway transportation represents an environmentally friendly alternative to automotive transportation for long distance travel. In the project Next Generation Train of the DLR, new railway solutions are developed for passenger and freight transportation for a broad range of applications (intercity, cargo, long distance). Specifically, the high-spe...
Article
Composite materials have brought new development and sizing possibilities for structural components in transportation systems. Their high specific material properties are enabling weight reduction while increasing structural performance. On the downside, composite materials are generally related to high material and manufacturing costs and increase...
Conference Paper
Hydrogen-powered fuel cells have established as one of the main emission-free alternatives to combustion engines in a broad range of transportation systems. This technology is however limited by the lower energy content of hydrogen on a volume basis compared to fossil fuels. For the mass market, high-pressure tanks have to be further developed so t...
Chapter
Textilbasierte Verbundwerkstoffe wie Gewebe oder Geflechte zeichnen sich durch ihre komplexe Faserbündelarchitektur aus und erfordern für die Materialcharakterisierung einen hohen experimentellen Aufwand. Die Fertigungsrandbedingungen spielen dabei eine maßgebende Rolle und beeinflussen direkt die Faserarchitektur, welche eine Rückwirkung auf die M...
Chapter
In Abb. 6.1 ist die virtuelle Testpyramide für die Charakterisierung der untersuchten textilbasierten Verbundlaminate dargestellt. Ziel der Untersuchung ist der Vergleich zwischen den numerischen Ansätzen nach dem Stand der Technik und den im DigitPro entwickelten numerischen Ansätzen. An der Basis der Pyramide werden Flachproben unter Zug- und Dru...
Book
Der Forschungscampus ARENA2036 ist ein neuer, langfristiger Projektansatz, der vom deutschen Bundesministerium für Bildung und Forschung (BMBF; Forschungscampus ARENA2036) finanziert wird. Er ist einer der neun großen wissenschaftlichen Campi in Deutschland und ist der einzige, der direkt in die Hauptphase (Phase 1) gestartet ist. Die ARENA2036 bef...
Article
Durch die stark zunehmende Digitalisierung wird das Produkt immer stärker mit der Produktion und dem In-Service-Bereich gekoppelt. Dies unterstützt die Automatisierung vieler Herstellprozesse und ermöglicht eine lückenlose Rückverfolgung eines jeden Bauteils bis hin zum Material. Im Forschungsprojekt Digitaler Fingerabdruck des Forschungscampus ARE...
Conference Paper
This paper reports on the experimental and numerical investigation of IM7/8552 unidirectional composites. Polished composite samples have been investigated using an optical microscope and an automatized algorithm for pattern recognition to determine the distribution of radius and inter-fibre distance. Based on the obtained parameters, multiple unit...
Conference Paper
Transparent thermoplastics like polycarbonate are widely used as windshields for its optical properties and for their higher specific mechanical properties compared to glass. Under use in airframe front windshields, plastics transparencies can be exposed to impact scenarios such as bird-strikes. The resulting load can lead to a complex loading of t...
Conference Paper
Mitte 2018 und nach fünf Jahren Forschungszeit kommt eines der drei technischen Startprojekte der ARENA2036 zum Ende. Zu diesem Anlass und als Projektabschluss sollen Forschungsergebnisse aus dem Projekt DigitPro vorgestellt werden. Der Digitale Prototyp stellt das Bindeglied zwischen klassischen Ingenieurstätigkeiten und der Industrie 4.0 dar. Bau...
Conference Paper
Full-text available
Manufacturing processes and parameters have played a crucial role in the design and analysis of composite structures. To exploit potential advantages of composite materials, it is necessary to predict and optimize the manufacturing steps in respect to the optimization of the structure itself. During the past years, the project DigitPro (Digital Pro...
Article
Das Deutsche Zentrum für Luft- und Raumfahrt e.V. (DLR) forscht im „Next Generation Train“ (NGT)-Projekt innerhalb der NGT Familie an einem Ultra-Hochgeschwindigkeitspersonenzug der nächsten Generation. Für einen effizienten Betrieb dieser Züge kann angenommen werden, dass sie über ein eigenes, separates Hochgeschwindigkeitsgleisnetz verfügen. Unte...
Conference Paper
The simulation of composites at microscopic or mesoscopic scales has benefited from the improvement of finite-element methods and the continuous increase in computing power, leading to a better understanding of the local phenomena guiding the composite behaviour and failure. The improving reliability of the numerical predictions allows for a progre...
Chapter
Since about three years, DigitPro, a sub-project of the government funded research project Active Research Environment for the Next generation of Automobile (ARENA2036) works on the development of a Digital Prototype, a closed simulation process chain which not only covers different simulation disciplines such as crushing or process analysis, but a...
Conference Paper
Since about three years, DigitPro, a sub-project of the government funded research project Active Research Environment for the Next generation of Automobile (ARENA2036) works on the development of a Digital Prototype, a closed simulation process chain which not only covers different simulation disciplines such as crushing or process analysis, but a...
Conference Paper
Standard approaches for the modelling and simulation of composite structures rely on the homogenisation of material properties on unidirectional plies. Doing so, simulations lose the ability to precisely describe local phenomena and complex failure mechanisms. In the research campus ARENA2036, the project DigitPro (Digital Prototype) develops a met...
Conference Paper
Full-text available
This paper discusses manufacturing process, experimental testing and numerical simulation of braided Ω-frame segments bonded to a multiaxial fabric skin which represent the typical airframe structure. The Ω-frame preforms were manufactured using the circular braiding process and impregnated with resin by Vacuum Asissted Process (VAP) technique. The...
Article
DLR@UniST ist eine Kooperationsinitiative zwischen dem Deutschen Zentrum für Luft- und Raumfahrt (DLR) und der Universität Stuttgart in den Schwerpunkten Luftfahrt, Weltraum, Energie und Verkehr. In dem Schwerpunkt Luftfahrt wurde das Projekt „Virtuelle Zulassungsrouten und Design für Aerostrukturen“ zwischen DLR-BT (Institut für Bauweisen und Stru...
Conference Paper
This paper discusses manufacturing process, experimental testing and numerical simulation of braided Ω-frame segments bonded to a multiaxial fabric skin which represent the typical airframe structure. The Ω-frame preforms were manufactured using the circular braiding process and impregnated with resin by Vacuum Asissted Process (VAP) technique. The...
Conference Paper
Teil des Forschungscampus ARENA2036 ist das Projekt DigitPro – Digitaler Prototyp. Entwickelt wird hier eine geschlossene, numerische Prozesskette zur Auslegung und Optimierung von textilbasierten Bauteilen aus Faserkunststoffverbund (FKV). Ziel ist es, den realen Produktentstehungsprozess zu unterstützen sowie die Entwicklungszeiten und -kosten zu...
Article
Es wird über die numerische Untersuchung von textilbasierten Faserverbundwerkstoffen berichtet. Basierend auf die Ermittlung von den Materialkennwerten des Laminats auf der mikroskopischen und mesoskopischen Ebene, wird das Verhalten des Laminats unter statischer und dynamischer Belastung untersucht. Ziel ist es, die Herstellung von faserverstärkte...
Conference Paper
So far analytical and, to a lesser extent, numerical approaches have been limited in their ability to predict the properties of braided composites because of the high complexity of the rovings’ interlacing. While many analytical theories have been developed to approach the stiffness of braided composites, only few models are able to reproduce their...

Citations

... The logical successor to DigitPro is the new Digitaler Fingerabdruck (DFA) research project in which the intelligent data collection, processing and transfer across the entire value creation chain -from the idea, through design, production and in-service to end-of-life -for the intelligent component and the versatile, autonomous factory of tomorrow [2] is to be realized. Whereas in DigitPro the focus was on closing the simulation process chain [3] for various fiber-based manufacturing processes such as braiding [4,5,6], infiltration [7], draping and Open Reed Weaving (ORW) [8] via various scales from the micro to the meso to the macroscopic scale, the focus of the research project DFA is now to collect data from production as well as sensor data from the life cycle of a component. These data can then be fed back into the simulation and thus enable conclusions to be drawn about an in-situ life cycle assessment, adaptation of the production environment and improvement of future components with similar requirements. ...
... The yarn geometry is kept constant, so a variation of this value is not taken into account. Another method is presented in [10], which uses a mapping algorithm to map the braid angle orientation from a mesoscopic process simulation on a macroscopic structure used for structural analysis. One disadvantage of this approach is the loss of information, e.g. the yarn undulation, due to the mapping, which limits its ability to describe the textile material behavior. ...
... These coordination points were used as an input file in LS-PrePost ® , under the card: *Define ˃ Curve. Similar to the work performed in [33], the constituent fibers were modelled with 2D-Beam elements. The virtual diameter of each beam part was defined equivalent to the diameter of each individual fiber within the actual yarn. ...
... This enabled an individual calculation of the intra yarn volume fraction and also enabled the possibility to numerically capture an intra yarn volume fraction gradient. Vinot et al. [25] used an elasto-plastic yarn material behavior with an artificial low yield strength to achieve a realistic textile geometry. Both authors [24] and [25] were able to realistically model yarn deformation and were able to show a good agreement with CT images. ...