@misc{56956,
  author       = {{Iqbal, Asif and Neukötter, Moritz}},
  title        = {{{Introduction to Uniaxially Elongated Polymer Blends: Instability due to Particles (Project-based course)}}},
  year         = {{2024}},
}

@misc{56954,
  author       = {{Schnückel, Vincent  and Neukötter, Moritz}},
  title        = {{{Automatisierte Filament- und Tropfenauswertung von viskoelastischen Polymerlösungen und -schmelzen in uniaxialer Dehnung (Studienarbeit)}}},
  year         = {{2024}},
}

@misc{56952,
  author       = {{Aulbur, Nick and Neukötter, Moritz}},
  title        = {{{Charakterisierung des Verhaltens verschiedener Fluide im Filament Extension Atomizer}}},
  year         = {{2024}},
}

@phdthesis{58164,
  abstract     = {{Der modellbasierte Regelungsentwurf erfordert eine möglichst genaue Kenntnis über das dynamische Verhalten des zugrunde liegenden physikalischen Systems. Durch maschinelle Lernverfahren besteht das Potenzial den Modellierungsaufwand im Vergleich zum klassischen Vorgehen zu reduzieren, indem physikalisches Vorwissen und an Messdaten trainierte Modelle effektiv zusammengeführt werden. Diese Dissertation entwickelt Methoden zur datengetriebenen Bestimmung von Modellen für den Regelungsentwurf nichtlinearer mechatronischer Systeme. Dazu wird die regelungstechnische Anwendbarkeit von Koopman-Operator-basierten Verfahren analysiert, die nichtlineare Dynamiken durch lineare Modelle approximieren. Darüber hinaus wird ein neuartiges Verfahren zur datengetriebenen Bestimmung von Port-Hamilton-Modellen entwickelt, die Energiezusammenhänge plausibel abbilden und sich unmittelbar für einen passivitätsbasierten Regelungsentwurf verwenden lassen. Zudem werden Ansätze zur automatischen Aktualisierung des im Regelkreis verwendeten Streckenmodells bei Modellunsicherheiten oder auftretenden Veränderungen der Systemdynamik vorgestellt. Experimentelle sowie simulative Untersuchungen demonstrieren die herausragende Prädiktionsgenauigkeit der datengetriebenen Modelle und die hohe Regelgüte. Die Ergebnisse dieser Dissertation leisten einen bedeutenden Beitrag, weil die datengetriebenen Modelle eine aus regelungstechnischer Sicht verwertbare Form aufweisen. Sie sind physikalisch interpretierbar und lassen sich nahtlos in bestehende Analyse- und Entwurfsmethoden einbinden. Dies eröffnet neue Perspektiven für zukünftige Anwendungen und Weiterentwicklungen.}},
  author       = {{Junker, Annika}},
  isbn         = {{9783947647477}},
  publisher    = {{Heinz Nixdorf Institut}},
  title        = {{{Datengetriebene Modellbildung für nichtlineare mechatronische Systeme in regelungstechnisch verwertbarer Form}}},
  doi          = {{10.17619/UNIPB/1-2158}},
  volume       = {{Band 428}},
  year         = {{2024}},
}

@inproceedings{57300,
  abstract     = {{Engineering methodologies for Cyber-Physical Systems (CPS) call for planning simulations and physical testing in early phases of product creation. Even in Model-Based Systems Engineering, there is a lack of systematic support that results in avoidable costs and iterations in the engineering process. Planning test cases and test scenarios along the product engineering process is not sufficiently integrated in terms of support especially for verification and validation engineers. Based on a systematic literature review, concepts for model-based planning of testing are developed. Characteristics of test cases and test scenarios of CPS are systematically identified. Generic templates for the creation of test cases and scenarios are derived. Based on the templates, a System Modeling Language (SysML) profile extension is developed which enables intuitive modelling of test cases and scenarios. The SysML profile is evaluated in a sample System-of-Systems in Disaster Response. It subsumes various types of sensor systems like rescue robotics, data science algorithms and visualization technologies like Augmented Reality to support decisions in extreme weather events. The templates and SysML profile significantly add value for engineers in the early and systematic planning of verification and validation.}},
  author       = {{Gräßler, Iris and Ebel, Marcel and Pottebaum, Jens}},
  booktitle    = {{2024 IEEE International Symposium on Systems Engineering (ISSE)}},
  keywords     = {{Systems Engineering, Systems verification, System testing}},
  location     = {{Perugia}},
  publisher    = {{IEEE}},
  title        = {{{Model-based planning of test cases and test scenarios to support engineering of Cyber-Physical Systems}}},
  doi          = {{10.1109/isse63315.2024.10741135}},
  year         = {{2024}},
}

@article{58348,
  abstract     = {{<jats:p> Clinching is a mechanical joining technology, in which a mainly form-fit joint is created by means of local cold forming. To characterize the load-bearing behavior of such joints, they are typically analyzed destructively, for example by tensile-shear tests in combination with metallographic sections. However, both the initiation and progress of failure can only be described to a limited extent by this method. Furthermore, these tests allow only limited conclusions about clinch points under in-service loading. More purposefully, clinch points can be analyzed nondestructively by combining in-situ computed tomography (CT) and transient dynamic analysis (TDA). The TDA continuously measures the dynamic behavior of the specimen and indicates failure events like crack initiation, which then can be evaluated thoroughly by stopping the test and performing a CT scan. To qualify the TDA for this task, it is necessary to link the observed damage behavior with specific dynamic characteristics. In this work, the complementation of in-situ CT and TDA is investigated by testing a clinched single-lap tensile-shear specimen made of aluminum. The testing procedure is stepwise: at certain displacement levels, the specimen is investigated by in-situ CT and TDA. While the in-situ CT provides the location, extent, and development of the failure phenomena, the TDA uses this information to evaluate the dynamic signal and detect relevant frequency ranges, which indicate damage events. The results demonstrate, that failure initiation and progression can be analyzed efficiently by combining both measuring systems. The TDA reliably detects relevant signal changes in the monitored frequency band. By means of in-situ computed tomography, the corresponding failure phenomena can be described in detail, enhancing the understanding of the load-bearing and deformation behavior of clinch points. The concatenation of characteristic signal changes and observed failure phenomena can henceforth be transferred to analyze complex structures during operation nondestructively by TDA. </jats:p>}},
  author       = {{Reschke, Gregor and Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik and Brosius, Alexander}},
  issn         = {{0954-4089}},
  journal      = {{Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering}},
  keywords     = {{Clinching, Non-destructive testing, Transient Dynamic Analysis}},
  publisher    = {{SAGE Publications}},
  title        = {{{In-situ computed tomography and transient dynamic analysis – failure analysis of a single-lap tensile-shear test with clinch points}}},
  doi          = {{10.1177/09544089241251646}},
  year         = {{2024}},
}

@inproceedings{58382,
  author       = {{Striewe, Marius and Bähr, Philipp and Meschut, Gerson and Hein, David and Sommer, Silke}},
  booktitle    = {{14. Kolloquium: Gemeinsame Forschung in der Mechanischen Fügetechnik}},
  title        = {{{Ersatzmodellentwicklung zur Berücksichtigung der lokalen Fügeelementkinematik in mechanisch gefügten Verbindungen für die Bauteilauslegung im stahlintensiven Karosseriebau}}},
  year         = {{2024}},
}

@book{58403,
  author       = {{Mayer, Bernd and Nagel, Christof and Fernandes, Pedro Henrique Evangelista and Matzenmiller, Anton and Köster, Christian and Melz, Tobias and Baumgartner, Jörg and Hecht, Matthias and Tews, Karina and Çavdar, Serkan and Meschut, Gerson}},
  publisher    = {{Forschungsvereinigung Stahlanwendung e.V.}},
  title        = {{{Lebensdauerprognose für Stahlklebverbindungen bei multiaxialer Belastung mit Phasenverschiebung, veränderlicher Mittelspannung und variablen Amplituden}}},
  volume       = {{1427}},
  year         = {{2024}},
}

@inproceedings{52216,
  author       = {{Tews, Karina and Teutenberg, Dominik and Meschut, Gerson}},
  booktitle    = {{DECHEMA Workshop für Klebstoffanwender: Simulation von Klebverbindungen}},
  location     = {{Köln}},
  title        = {{{Mechanisches Verhalten: Charakterisierung von Klebstoffen}}},
  year         = {{2024}},
}

@article{55762,
  abstract     = {{The corrosion behavior of a hybrid laminate consisting of laser-structured aluminum EN AW-6082 ∪ carbon fiber-reinforced polymer was investigated. Specimens were corroded in aqueous NaCl electrolyte (0.1 mol/L) over a period of up to 31 days and characterized continuously by means of scanning electron and light microscopy, supplemented by energy dispersive X-ray spectroscopy. Comparative linear sweep voltammetry was employed on the first and seventh day of the corrosion experiment. The influence of different laser morphologies and production process parameters on corrosion behavior was compared. The corrosion reaction mainly arises from the aluminum component and shows distinct differences in long-term corrosion morphology between pure EN AW-6082 and the hybrid laminate. Compared to short-term investigations, a strong influence of galvanic corrosion on the interface is assumed. No distinct influences of different laser structuring and process parameters on the corrosion behavior were detected. Weight measurements suggest a continuous loss of mass attributed to the detachment of corrosion products.</jats:p>}},
  author       = {{Delp, Alexander and Wu, Shuang and Freund, Jonathan and Scholz, Ronja and Löbbecke, Miriam and Tröster, Thomas and Haubrich, Jan and Walther, Frank}},
  issn         = {{1996-1944}},
  journal      = {{Materials}},
  number       = {{8}},
  publisher    = {{MDPI AG}},
  title        = {{{Characterization of Interfacial Corrosion Behavior of Hybrid Laminate EN AW-6082 ∪ CFRP}}},
  doi          = {{10.3390/ma17081907}},
  volume       = {{17}},
  year         = {{2024}},
}

@unpublished{58441,
  abstract     = {{This study presents a numerical approach using a 3D finite element model to quantify the remaining clamp load of a plastic nut joint after a specific time. The viscoelastic relaxation of a thermoplastic nut, which is predominantly screwed on a welding stud, is described by a material card using Prony Series. Prony Series are derived from experimental Dynamical Mechanical Analysis with different moisture and fiber contents of the thermoplastic. Since plastic nuts usually do not have preformed threads, the increased temperatures and resulting stresses from the thread-forming process are considered in the simulation. Firstly, the FE model is verified by substrate stress relaxation tests. Subsequently, experimental clamp load measurements with miniature compression load cells verify the clamp load prediction. Finally, the developed model is used to analyze the clamp load distribution within the threads}},
  author       = {{Wippermann, Jan and Meschut, Gerson}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Numerical modeling of clamp load relaxation of plastic nuts under varying moisture and fiber content}}},
  year         = {{2024}},
}

@inbook{58440,
  author       = {{Wippermann, Jan and Meschut, Gerson}},
  booktitle    = {{Proceedings of the Munich Symposium on Lightweight Design 2023}},
  isbn         = {{9783031646683}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Effect of Water Absorption on the Clamp Load of Plastic Nuts}}},
  doi          = {{10.1007/978-3-031-64669-0_5}},
  year         = {{2024}},
}

@article{58442,
  author       = {{Wippermann, Jan and Meschut, Gerson}},
  journal      = {{JOINING PLASTICS}},
  title        = {{{Analyse des Ein- und Überdrehmoments von Kunststoffmuttern in Abhängigkeit von der Luftfeuchtigkeit}}},
  volume       = {{18}},
  year         = {{2024}},
}

@phdthesis{58448,
  abstract     = {{Die Inbetriebnahme von Steuerungen und Regelungen stellt sicher, dass ein mechatronisches System ordnungsgemäß funktioniert und den Anforderungen gerecht wird. Der modellbasierte Entwurf basiert auf einem genauen Simulationsmodell. Allerdings ist dieser klassische Weg bei komplexen Systemen oft nicht praktikabel, da die analytische Modellierung zu kompliziert und zeitaufwendig ist. Diese Forschungslücke wird durch Verfahren adressiert, die eine effiziente und sichere Inbetriebnahme ermöglichen. Diese Verfahren kombinieren Regelungstechnik und Reinforcement Learning und nutzen vorhandenes Wissen über die Regelungsaufgabe, um Korrekturen basierend auf Messdaten und der probabilistischen Gauß-Prozess-Regression vorzunehmen. Das Vorwissen kann als teilweise bekanntes physikalisches Modell oder als Steuerungsfunktion vorliegen. Anwendungsbeispiele sind der Ultraschalldrahtbondprozess, verschiedene Pendelsysteme und ein Hexapod. Eine angepasste Bayessche Optimierung wird zur Identifikation einer Steuerparametrisierung für das Ultraschallbonden eingesetzt. Außerdem wird eine hybride Optimalsteuerung für das Doppelpendel auf einem Wagen entwickelt und erfolgreich validiert. Fur einen Hexapod zur Fahrzeugachsprüfung wird eine hybride Zustandslinearisierung formuliert und ein Funktionsnachweis im Rahmen einer Simulation erbracht. Die Einhaltung technischer Rahmenbedingungen und stabiles Systemverhalten werden durch probabilistische Pradiktionen gewährleistet. In allen Anwendungsfällen wird eine Steigerung der Effizienz und Güte erzielt.}},
  author       = {{Hesse, Michael}},
  isbn         = {{978-3-947647-45-3}},
  issn         = {{2365-4422}},
  publisher    = {{Heinz Nixdorf Institut}},
  title        = {{{Interaktive Inbetriebnahme von Steuerungen und Regelungen für partiell bekannte dynamische Systeme mittels Gauß-Prozess-Regression}}},
  doi          = {{10.17619/UNIPB/1-2135}},
  volume       = {{426}},
  year         = {{2024}},
}

@inproceedings{58446,
  author       = {{Wippermann, Jan and Meschut, Gerson}},
  booktitle    = {{14 Gemeinsames Kolloquium Zur Mechanischen Fügetechnik}},
  title        = {{{Entwicklung einer Methode zur Prognose der Verschraubungsparameter von Kunststoffmuttern}}},
  year         = {{2024}},
}

@inproceedings{58458,
  author       = {{Gilich, Julian and Teutenberg, Dominik and Meschut, Gerson and Gröger, Benjamin and Wiebicke, Felix and Koch, Ilja and Gude, Maik}},
  booktitle    = {{77th IIW Annual Assembly and International Conference on Welding and Joining}},
  location     = {{Rhodos, Griechenland}},
  title        = {{{Influences on the Material Displacement and Compression Stresses in the Joining Process of Highly Viscous Thermal Interface Materials}}},
  year         = {{2024}},
}

@inproceedings{56487,
  author       = {{Ehlert, Thomas and Mamedov, Tural and Schubert, Markus and Kenig, Eugeny Y.}},
  location     = {{Dresden}},
  title        = {{{Estimation of efficiency loss for stationary and moving structured packing columns using the hydrodynamic analogy approach}}},
  year         = {{2024}},
}

@inproceedings{58503,
  author       = {{Hambach, Dennis}},
  location     = {{Paderborn}},
  title        = {{{Technologieakzeptanz beim Einsatz von Handhelds zur Unterstützung des Hörverstehens. Eine Datendiskussion}}},
  year         = {{2024}},
}

@inproceedings{49430,
  abstract     = {{Within the current energy and environmental crisis, new material- and energy-saving processes are needed. For this reason, this study focuses on the development of a new forming technology for Ti-6Al-4V sheet metal. It is based on combination of solution treatment by resistive heating with rapid tool-based quenching and subsequent annealing. This new “TISTRAQ” process is comparable with press-hardening already known for steels and hot die quenching known for aluminium alloys. One of the main influencing factors for this process is the heat transfer coefficient (HTC). It is an important driver for adjustment of basic parameters, as selection of tool material or the forming speed but also plays an important role while elaborating temperature distribution in the numerical model. Therefore, a new and unique test rig was developed to determine the HTC and to perform tool-based heat treatment at specimen level under laboratory conditions. The test rig was used to investigate the influence of the titanium-tool-lubricant system on HTC and cooling rate. Further the effect of heat treatment in the test rig and tool-based quenching on microstructure and mechanical properties was studied. To improve the prediction of the temperature distribution of the titanium during cooling, the HTC was integrated into the numerical process simulation}},
  author       = {{Kaiser, Maximilian Alexander and Höschen, Fabian and Pfeffer, Nina and Merten, Mathias and Meyer, Thomas and Marten, Thorsten and Rockicki, Pawel and Höppel, Heinz Werner and Tröster, Thomas}},
  booktitle    = {{IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]}},
  keywords     = {{Interfacial heat transfer coefficient, Ti-6Al-4V, nonisothermal forming, thermomechanical processing, TISTRAQ process}},
  location     = {{Edinburgh}},
  title        = {{{The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - investigation on heat transfer coefficient and influence on cooling rates}}},
  doi          = {{doi.org/10.7490/f1000research.1119929.1}},
  year         = {{2024}},
}

@inproceedings{49437,
  abstract     = {{The phase and TTT diagrams of the Ti-6Al-4V system allow the development of a new forming process for a more energy- and materialefficient production of sheet metal parts. This new “TISTRAQ” process is composed of two steps. In terms of process technology, the first step is comparable to a direct press-hardening process already well known for steels. In this step, the Ti-6Al-4V sheet material is resistively heated to a temperature below β-transus Tβ and, after a very short holding time, simultaneously formed and quenched by use of water cooled tools. Thereby, the β phase undergoes a martensitic transformation. The second step is a subsequent short-time annealing, which leads to a hardening of the material. In this work, a new test rig using resistive heating technique was used in order to produce
different solution treated and tool quenched (STQ) and subsequently annealed (STA) states. In this paper, the effects of heating rate, solution treatment temperature and holding time on microstructure and mechanical properties are addressed. For the characterisation, tensile testing and scanning electron microscopy were used. By the systematic variation of applied processing parameters, dominating effects on microstructure and mechanical properties were evaluated. For example, the solution treatment temperature was found to have a significant effect on microstructural features and characteristic strength and strain values. The obtained results reveal a high potential for future technical applications.}},
  author       = {{Pfeffer, Nina and Kaiser, Maximilian Alexander and Meyer, Thomas and Göken, Mathias and Höppel, Heinz Werner}},
  booktitle    = {{IOM3. Chapter 14: Forming, Machining & Joining [version 1; not peer reviewed]}},
  keywords     = {{Ti-6Al-4V, thermomechanical processing, resistive heating, quench-forming, process parameter-microstructure-properties relationship}},
  location     = {{Edinburgh}},
  title        = {{{The new TISTRAQ process: Solution treatment with rapid quenching and annealing for Ti-6Al-4V sheet metal part forming - the effect of processing parameters on microstructure and mechanical properties}}},
  doi          = {{https://doi.org/10.7490/f1000research.1119929.1}},
  year         = {{2024}},
}