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    EXC 3120 BlueMat - Research Topic B1: Tunable Water Condensation and Evaporation
    Evaporative flows at porous surfaces are significantly influenced by the liquid surface exposed to the vapor phase and the vapor pressure of the liquid at the interface, with additional contributions from hydraulic permeability and hydrophilicity within the porous structure. Our goal is to actively control water condensation and evaporation at the vapor-exposed surfaces of structured materials. The key scientific questions are: How can we fabricate 3D structured porous materials systems that – depending on electrical, photonic, or chemical (pH) stimuli – change their evaporative behavior? How can we characterize, understand, and predict water condensation and evaporation (and drying) across scales? How can we achieve tailor-made switching times, imbibition-drying cycles, and minimal energy losses from viscous dissipation?
      33
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    EXC 3120 BlueMat - Cross Area Exploitation & Experiencing
    Our vision is to make Blue Materials not only useful but also to spark fascination among scientists and the general public. In RF Exploitation, we aim to translate Blue- Mat’s results into real-world applications, including the production of substantial quantities of Blue Materials (Obj. 3). In RF Experiencing we will develop innovative ways to evoke public interest in the diversity and dynamics of water in materials through artistic formats and virtual reality. By creating contact zones for scientists and artists we will build a unique creative environment where scientific and artistic methodologies come into dialogue to unfold new dimensions for co-creation.
      34
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    Transferprojekt: Einsatz generativ gefertigter Strukturbauteile in der Hauptspindel einer Werkzeugmaschine
    The modern machine tool is constantly striving for maximum productivity with simultaneously increasing demands on the achievable working accuracy. These contradictory requirements are significantly influenced by the dynamic machine behaviour, whereby increasing the system damping in particular is effective for reducing undesired process vibrations. In this context, externally applied vibration damping systems are used, for example, whose integration is cost-intensive on the one hand and requires a corresponding amount of available installation space on the other. For this reason, a direct functional integration of damping structures into the vibration-loaded structural components is sought. The main spindle as a central component in the force flax of a machine tool is particularly suitable for the integration of damping elements. As part of the proposed research project, the Laboratory for Machine Tools and Production Engineering (WZL) of RWTH Aachen University and the Institute for Industrialization of Smart Materials (ISM), together with the spindle manufacturer WEISS Spindeltechnologie GmbH, aim to develop a damping-optimized spindle nose that forms the transition between the tool interface and the spindle shaft. By using the additive manufacturing process selective laser melting (SLM), flexible structures can be created, whereby non-melted material can act as particle dampers or squeeze film dampers can be placed within created cavities. The cavities required for this are designed using FE-based topology optimisation methods. The approach aims at the effective damping of high-frequency spindle vibrations, which are often the cause of process instabilities in machining, especially in the high-speed range.
      17
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    roBust post-pRocessing of AdditiVEly manufactured components
    Die additive Fertigung (AM) bietet im Vergleich zu herkömmlichen Fertigungsverfahren eine hohe Designfreiheit. Bislang wird dies jedoch noch nicht in vollem Umfang für die Herstellung hochwertiger Produkte in der Luftfahrt und im Energiesektor genutzt. BRAVE zielt daher darauf ab, einen integrierten digitalen Rahmen für die Optimierung der AM-Lieferkette zu schaffen, und dabei insbesondere die Oberflächenqualität zu erhöhen. Auf deutscher Seite soll eine kamerabasierte Sensorik entwickelt werden, die während des AM-Prozesses eine in-situ Rauheitsvermessung insbesondere von innenliegenden, schwer zugänglichen Bereichen erlaubt. Das Teilvorhaben BRAVE-TUHH umfasst das Design und die Fertigung von Testgeometrien für die Rauheitsuntersuchungen, sowie die experimentelle Ermittlung rauheitsoptimierter Prozessparameter. Anschließend werden Komponenten entwickelt, die eine Integration der Lichtfeldkamera als Sensor in einer PBF-LB/M-Anlage (pulverbettbasiertes Schmelzen von Metallen mittels Laserstrahl) ermöglichen, sowie die Inbetriebnahme und Funktionstests der modifizierten Anlage. Es erfolgen Vergleichsmessungen zur Validierung der neuartigen Rauheitssensorik. Projektpartner: Raytrix GmbH, Kiel Assozierter Projektpartner: Ampower GmbH & Co. KG, Hamburg
      37
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    CRC 1615 - Project C01: Integration of components into adaptive geometries
    Within this project, self-adaptive structures that control reactions based on the reactor conditions are investigated. In the beginning, suitable unit cells and materials for selected reactions are investigated, so that structures for high heat- and mass transport can be designed. With this, self-adapting, additive manufactured (AM) structures with temperature-controlled actuators, as well as self-adapting AM structures with pH-controlled actuators will be investigated. Furthermore, the integration of components for in situ detection & self-adjustment into AM structures is part of the research activities. The final step is the validation by means of experiments and CFD.
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