@misc{OstSeidlitzUlkeWinteretal., author = {Ost, Lucas and Seidlitz, Holger and Ulke-Winter, Lars and Kuke, Felix}, title = {Development of a spherical high-pressure tank for hydrogen storage in mobile and stationary applications}, series = {Energy Technology}, journal = {Energy Technology}, publisher = {Wiley}, issn = {2194-4288}, doi = {10.1002/ente.202300942}, pages = {5}, abstract = {In the sub-project Mukran of the BMBF-funded flagship project TransHyDE, spherical and nearly spherical-shaped (isotensoids with short cylindrical spacer) high-pressure tanks are developed for hydrogen storage. This article presents the planned work of the Chair of Polymer-based Lightweight Design at the BTU Cottbus-Senftenberg and the research division PYCO at the Fraunhofer IAP. The research topics include the fiber-compatible design of the liners, the rule-based optimization of the layer structure of the load-bearing overwrap made of carbon fiber-reinforced plastic, the development of a fiber placement strategy, and the integration of the tanks into a frame as a mobile storage solution.}, language = {en} } @misc{SeidlitzOstAmbrosioetal., author = {Seidlitz, Holger and Ost, Lucas and Ambrosio, Marcello and Kuke, Felix and Michailov, Vesselin and Shapovalov, Oleg and Doynov, Nikolay}, title = {Erw{\"a}rmung von Composites simulieren}, series = {Kunststoffe}, journal = {Kunststoffe}, number = {2}, issn = {0023-5563}, pages = {66 -- 70}, abstract = {Neuartige, werkstoffgerechte F{\"u}geverfahren f{\"u}r Faserkunststoffverbunde setzen die Erw{\"a}rmung der Materialien voraus. Um die damit verbundenen komplexen Temperaturfelder und -verl{\"a}ufe vorherzusagen, haben das Fraunhofer IAP und die BTU Cottbus-Senftenberg numerische Verfahren entwickelt. Mit diesen k{\"o}nnen auch verschiedene Strahlungsquellen und Prozessabl{\"a}ufe simuliert werden.}, language = {de} } @misc{ShapovalovOstKukeetal., author = {Shapovalov, Oleg and Ost, Lucas and Kuke, Felix and Doynov, Nikolay and Ambrosio, Marcello and Seidlitz, Holger and Michailov, Vesselin}, title = {Entwicklung und Analyse einer F{\"u}gestrategie f{\"u}r FKV/Metall-Mischverbindungen auf Basis der CMT-Pinschweißtechnik}, series = {Joining Plastics}, volume = {17}, journal = {Joining Plastics}, number = {1}, issn = {1864-3450}, pages = {28 -- 35}, abstract = {Dieser Beitrag stellt eine Entwicklung, Anpassung und Untersuchung der neuartigen Pinschweißtechnik zur Verbindung thermoplastischer Faserkunststoffverbunde mit metallischen F{\"u}gepartnern dar. Die untersuchte F{\"u}getechnik bietet, im Vergleich zu anderen Verfahren, neben einer einseitigen Zug{\"a}nglichkeit, ein hohes Leichtbaupotenzial. An Multimaterial-Einzelpinverbindungen wurden die CMT-Pinschweißbarkeit charakterisiert und unterschiedliche F{\"u}gestrategien erprobt und ausgewertet. Als Bewertungskriterien wurden das Schweißgut sowie der Faser- und Matrixerhalt in Abh{\"a}ngigkeit von den Schweißparametern untersucht. Die mechanische Beanspruchbarkeit der mit dem entwickelten Verfahren erstellten Verbindungen wurde in Scherzugversuchen ermittelt. An Mehrpinverbindungen wurde anschließend der Einfluss der Pinanordnung untersucht und die Auslegung der F{\"u}gezone analysiert. Der F{\"u}geprozess wurde an Funktionsmustern und diese wiederum in 3-Punkt-Biegeversuchen validiert sowie mit dem Kleben verglichen.}, language = {de} } @misc{SeidlitzMichailovOstetal., author = {Seidlitz, Holger and Michailov, Vesselin and Ost, Lucas and Kuke, Felix and Ambrosio, Marcello and Shapovalov, Oleg and Doynov, Nikolay}, title = {Simulation of Composites' Heating}, series = {Kunststoffe international}, volume = {113}, journal = {Kunststoffe international}, number = {4}, issn = {1862-4243}, pages = {60 -- 64}, abstract = {Modern material-compatible joining methods for fiber-reinforced plastics require the heating of the materials. In order to predict the respective complex temperature fields and curves, the Fraunhofer IAP and the BTU Cottbus-Senftenberg have developed numerical methods, which are able to simulate different radiation sources and process sequences as well.}, language = {en} } @misc{KepirSeidlitzUlkeWinteretal., author = {Kepir, Yusuf and Seidlitz, Holger and Ulke-Winter, Lars and Felix, Kuke}, title = {Lightweight heat exchanger design using graphene-reinforced ceramics : a comparative study of dimensional and material effects}, series = {Proceedings of the 4th International Online Conference on Materials, 3-6 November 2025}, journal = {Proceedings of the 4th International Online Conference on Materials, 3-6 November 2025}, publisher = {MDPI}, address = {Basel}, abstract = {In high-temperature environments, heat exchangers require lightweight designs, high thermal resistance, and high effectiveness. Graphene-reinforced ceramic matrix composites (G-CMC) offer promising thermal properties for such applications. This study investigates the effectiveness changes of a block-type heat exchanger made of G-CMC, depending on the length and design, leveraging the potential of 3D printing in the production of complex geometries.}, language = {en} } @misc{KepirSeidlitzUlkeWinteretal., author = {Kepir, Yusuf and Seidlitz, Holger and Ulke-Winter, Lars and Kuke, Felix}, title = {Geometric optimization and advanced material integration for enhanced thermal performance of compact cross-flow heat exchangers in high-temperature applications}, series = {Proceedings of the 6th International Electronic Conference on Applied Sciences, 9-11 December 2025}, journal = {Proceedings of the 6th International Electronic Conference on Applied Sciences, 9-11 December 2025}, publisher = {MDPI}, address = {Basel}, abstract = {Heat exchangers used in high-temperature environments require lightweight designs with high thermal resistance and efficiency. This study numerically investigates the thermal performance of a multi-channel compact cross-flow heat exchanger, focusing on geometric configurations and material selection.}, language = {en} }