@inproceedings{56207,
  abstract     = {{We present a data acquisition and visualization pipeline that allows experts to monitor additive manufacturing processes, in particular laser metal deposition with wire (LMD-w) processes, in immersive virtual reality. Our virtual environment consists of a digital shadow of the LMD-w production site enriched with additional measurement data shown on both static as well as handheld virtual displays. Users can explore the production site by enhanced teleportation capabilities that enable them to change their scale as well as their elevation above the ground plane. In an exploratory user study with 22 participants, we demonstrate that our system is generally suitable for the supervision of LMD-w processes while generating low task load and cybersickness. Therefore, it serves as a first promising step towards the successful application of virtual reality technology in the comparatively young field of additive manufacturing.}},
  author       = {{Rupp, Daniel and Kuhlen, Torsten W. and Rarbach, Sven and Wiechel, Dominik and Pottebaum, Jens and Weidemann, Tizia and Tran, Duc Thanh and Day, Robin and Zielinski, Jonas and König, Valentina and Bremer, Jan and Kosche, Thomas and Grimm, Andreas and Bergs, Thomas and Gräßler, Iris and Weissker, Tim}},
  booktitle    = {{Proceedings of the GI VR/AR Workshop 2024}},
  location     = {{Hamburg}},
  publisher    = {{Gesellschaft für Informatik e.V.}},
  title        = {{{Virtual Reality as a Tool for Monitoring Additive Manufacturing Processes via Digital Shadows}}},
  doi          = {{10.18420/vrar2024_0006}},
  year         = {{2024}},
}

@inproceedings{56108,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Engineering projects for complex technical systems such as automobiles demand extensive requirement specifications and corresponding hierarchy levels in system architectures. Especially when considering emergent phenomena, such as total weight or aerodynamics, a closely networked collaboration of discipline‐specific and cross‐disciplinary roles is required. Further, in large organizations with a group structure, resulting functional and non‐functional contents need to be managed by distinct Systems Engineering roles. For example, the role “property manager” takes care of achieving overarching product properties, such as weight or aerodynamics, which cannot be directly fixed, but result from many specifications. This paper proposes new Systems Engineering roles and their application in a German Original Equipment Manufacturer (OEM). For validation, the roles have already been applied in everyday engineering projects at the OEM. The concept proved to be indispensable and transferable to other Systems Engineering projects.</jats:p>}},
  author       = {{Gräßler, Iris and Pfeifer, Jan Niklas and Hintz, Florian and Meyrl, Nicolas}},
  booktitle    = {{INCOSE International Symposium}},
  issn         = {{2334-5837}},
  keywords     = {{Systems Engineering roles, properties, features, emergent phenomena, automotive}},
  location     = {{Dublin, Ireland}},
  number       = {{1}},
  pages        = {{584--598}},
  publisher    = {{Wiley}},
  title        = {{{Systems Engineering roles to handle emergent properties and behaviors in complex technical systems}}},
  doi          = {{10.1002/iis2.13164}},
  volume       = {{34}},
  year         = {{2024}},
}

@article{54281,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Polycarbonate (PC) is an amorphous polymer that is an extremely robust material with a high tenacity, and thus suitable for a lightweight construction with glass‐like transparency. Due to these advantageous properties, PC is often used in industry for example in medical devices, automotive headlamps, sporting equipment, electronics, and a variety of other products. PC is often subjected to uniaxial and biaxial loading conditions. Therefore, reliable material models have to take into account the various resulting experimental effects. For those reasons, we investigate PC specimens under uniaxial and biaxial loading by using different stretch rates and loading scenarios. In addition to that, we propose methods for optical measurement of local stretches to obtain the approximated local true stress. In future work, the displacement fields and the resulting reaction forces will be used for parameter identification of constitutive equations.</jats:p>}},
  author       = {{Hamdoun, Ayoub and Mahnken, Rolf}},
  issn         = {{1617-7061}},
  journal      = {{PAMM}},
  publisher    = {{Wiley}},
  title        = {{{Experimental investigations of uniaxial and biaxial cold stretching within PC‐films and bars using optical measurements}}},
  doi          = {{10.1002/pamm.202300114}},
  year         = {{2024}},
}

@article{54279,
  author       = {{Hamdoun, Ayoub and Mahnken, Rolf}},
  issn         = {{0032-3861}},
  journal      = {{Polymer}},
  publisher    = {{Elsevier BV}},
  title        = {{{Uniaxial and biaxial experimental investigation of glassy polymers}}},
  doi          = {{10.1016/j.polymer.2024.126981}},
  volume       = {{299}},
  year         = {{2024}},
}

@article{54280,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Cold forming of polycarbonate films results in the formation of shear bands in the necking zone. The numerical results obtained from standard viscoplastic material models exhibit mesh size dependency, requiring mathematical regularization. For this purpose, we present in this work a large deformation gradient theory for a viscoplastic isotropic material model published before. We extend our model to a micromorphic model by introducing a new micromorphic variable as an additional degree of freedom along with its first gradient. This variable represents a microequivalent plastic strain. The relation between the macroequivalent plastic strain and the micromorphic variable is accomplished by a micromorphic coupling modulus. This coupling forces proximity between the macro- and microvariables, leading to the targeted regularization effect. The micromorphic model is implemented as a three-dimensional initial boundary value problem in an in-house finite element tool. The analysis is performed for both uniaxial and biaxial specimens. The provided numerical examples show the ability of our model to regularize shear bands within the specimens and address the issue of localization.</jats:p>}},
  author       = {{Hamdoun, Ayoub and Mahnken, Rolf}},
  issn         = {{0939-1533}},
  journal      = {{Archive of Applied Mechanics}},
  number       = {{5}},
  pages        = {{1221--1242}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{A large deformation gradient theory for glassy polymers by means of micromorphic regularization}}},
  doi          = {{10.1007/s00419-024-02570-0}},
  volume       = {{94}},
  year         = {{2024}},
}

@inbook{56299,
  author       = {{Schultz, Andreas Maximilian and Dotzki, Fabian and Eisenbach, Thomas and Mozgova, Iryna}},
  booktitle    = {{Next Chapter in Mobility}},
  isbn         = {{9783658426460}},
  location     = {{Duisburg}},
  publisher    = {{Springer Fachmedien Wiesbaden}},
  title        = {{{Sicherheit bei Großveranstaltungen – Mobilitätsverhalten und Personenströme im Fokus}}},
  doi          = {{10.1007/978-3-658-42647-7_54}},
  year         = {{2024}},
}

@inproceedings{56484,
  author       = {{Mamedov, Tural and Ehlert, Thomas and Schleicher, Eckhard and Dias, Felipe D. A. and Schubert, Markus and Kenig, Eugeny Y. and Hampel, Uwe}},
  location     = {{Dresden}},
  title        = {{{A conductivity-based flow imaging sensor for the investigation of liquid flow dynamics in stationary and moving separation columns packed with Mellapak 250Y}}},
  year         = {{2024}},
}

@inproceedings{56601,
  author       = {{Franke, Patrick and Devasthali, Oorv and Schubert, Markus and Hampel, Uwe and Kenig, Eugeny Y.}},
  location     = {{Dresden}},
  title        = {{{Experimental determination of liquid-side mass transfer coefficients in sandwich packings in the preloading zone and above the loading point}}},
  year         = {{2024}},
}

@article{56608,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>A new control method aims at the precise high dynamic control of the force signal for experimental vibration analysis, which is generated by an electrodynamic shaker. A bending beam is used as a nonlinear test object. A design and a surrogate model of the test rig are shown and parameterized based on test rig measurements. The force control algorithm using input/output linearisation is described and implemented in Matlab/Simulink for simulative validation studies. Conclusions drawn from the mathematical description of the problem as well as simulation results show that the design of the contact between shaker and test object is crucial to achieve a high control bandwidth and at the same time reduce the energy consumption of the shaker. This leads to the practical application using a novel damping contact element. Finally, experimental test rig results are presented which show a closed loop bandwidth of at least 250 Hz for sinusoidal excitation signals.</jats:p>}},
  author       = {{Lüke, Christopher and Trächtler, Ansgar}},
  issn         = {{0015-7899}},
  journal      = {{Forschung im Ingenieurwesen}},
  number       = {{1}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Highly dynamic force control for experimental vibration analysis with an electrodynamic shaker Hochdynamische Kraftregelung für die experimentelle Schwingungsanalyse mit einem elektrodynamischen Shaker}}},
  doi          = {{10.1007/s10010-024-00757-z}},
  volume       = {{88}},
  year         = {{2024}},
}

@article{54847,
  abstract     = {{The widespread adoption of ultra-high strength steels, due to their high bulk resistivity, intensifies expulsion issues in resistance spot welding (RSW), deteriorating both the spot weld and surface quality. This study presents a novel approach to prevent expulsion by employing a preheating current. Through characteristic analysis of joint formation under critical welding current, the importance of plastic material encapsulation around the weld nugget (plastic shell) at high temperatures in preventing expulsion is highlighted. To evaluate the effect of preheating on the plastic shell and understand its mechanism in expulsion prevention, a two-dimensional welding simulation model for dissimilar ultra-high strength steel joints was established. The results showed that optimal preheating enhances the thickness of the plastic shell, improving its ability to encapsulate the weld nugget during the primary welding phase, thereby diminishing expulsion risks. Experimental validation confirmed that by employing the optimal preheating current, the maximum nugget diameter was enhanced to 9.42 mm, marking an increase of 13.4 % and extending the weldable current range by 27.5 %. Under quasi-static cross-tensile loading, joints with preheating demonstrated a 7.9 % enhancement in maximum load-bearing capacity compared to joints without preheating, showing a reproducible and complete pull-out failure mode within the heat-affected zone. This study offers a prevention method based on underlying mechanisms, providing a new perspective for future research on welding parameter optimization with the aim of expulsion prevention.}},
  author       = {{Yang, Keke and El-Sari, Bassel and Olfert, Viktoria and Wang, Zhuoqun and Biegler, Max and Rethmeier, Michael and Meschut, Gerson}},
  issn         = {{1526-6125}},
  journal      = {{Journal of Manufacturing Processes}},
  keywords     = {{Expulsion Resistance spot welding Finite element modelling Preheating Weldable current range Ultra-high strength steel}},
  pages        = {{489--502}},
  publisher    = {{Elsevier BV}},
  title        = {{{Expulsion prevention in resistance spot welding of dissimilar joints with ultra-high strength steel: An analysis of the mechanism and effect of preheating current}}},
  doi          = {{10.1016/j.jmapro.2024.06.034}},
  volume       = {{124}},
  year         = {{2024}},
}

@inproceedings{56682,
  author       = {{Einwag, Jonathan-Markus and Goetz, Stefan and Wartzack, Sandro}},
  booktitle    = {{DS 133: Proceedings of the 35th Symposium Design for X (DFX2024)}},
  publisher    = {{The Design Society}},
  title        = {{{Approach for the Reliable and Virtual Design of Mechanical Joints in an Uncertain Environment}}},
  doi          = {{10.35199/dfx2024.23}},
  year         = {{2024}},
}

@article{52229,
  author       = {{Bruns, Bastian and Gross, Michel and Grünewald, Marcus and Bertsch, Valentin and Riese, Julia}},
  issn         = {{0959-6526}},
  journal      = {{Journal of Cleaner Production}},
  keywords     = {{Industrial and Manufacturing Engineering, Strategy and Management, General Environmental Science, Renewable Energy, Sustainability and the Environment, Building and Construction}},
  publisher    = {{Elsevier BV}},
  title        = {{{A multi-step framework for the design of a flexible power-to-methane process}}},
  doi          = {{10.1016/j.jclepro.2024.141434}},
  year         = {{2024}},
}

@article{52388,
  author       = {{Riese, Julia and Fasel, Henrik and Pannok, Maik and Lier, Stefan}},
  issn         = {{2352-5509}},
  journal      = {{Sustainable Production and Consumption}},
  keywords     = {{Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment, Environmental Chemistry, Environmental Engineering}},
  publisher    = {{Elsevier BV}},
  title        = {{{Decentralized production concepts for bio-based polymers - implications for supply chains, costs, and the carbon footprint}}},
  doi          = {{10.1016/j.spc.2024.03.001}},
  year         = {{2024}},
}

@article{55654,
  author       = {{Röder, Lilli Sophia and Gröngröft, Arne and Grünewald, Marcus and Riese, Julia}},
  issn         = {{0098-1354}},
  journal      = {{Computers &amp; Chemical Engineering}},
  publisher    = {{Elsevier BV}},
  title        = {{{Optimization of Design and Operation of a Digestate Treatment Cascade for Demand Side Management Implementation}}},
  doi          = {{10.1016/j.compchemeng.2024.108838}},
  year         = {{2024}},
}

@inproceedings{55150,
  author       = {{Ehlert, Thomas and Pöschmann, René and Müller, Steffen and Paschold, Jürgen and Brösigke, Georg and Repke, Jens-Uwe and Riese, Julia and Kenig, Eugeny Y.}},
  location     = {{Bochum}},
  title        = {{{Modellierung kleinskaliger Trennapparate mit Strukturpackungen und der Scale-up mit dem Ansatz der hydrodynamischen Analogien}}},
  year         = {{2024}},
}

@article{56778,
  author       = {{Bernemann, Sören Antonius and Maćkowiak, J.F. and Maćkowiak, J. and Kenig, Eugeny}},
  issn         = {{0009-2509}},
  journal      = {{Chemical Engineering Science}},
  publisher    = {{Elsevier BV}},
  title        = {{{Computer aided flow investigation of liquid agricultural wastes}}},
  doi          = {{10.1016/j.ces.2024.120639}},
  volume       = {{300}},
  year         = {{2024}},
}

@phdthesis{54552,
  abstract     = {{Die vorliegende Dissertation beschreibt das Konzept und den Entwicklungsprozess eines Lichtsignalanlagenregelungssystems bis zur Realumsetzung. Das Regelungssystem, welches im Rahmen des Pilotprojekts Schlosskreuzung entstanden ist, besteht dabei aus zwei untereinander abgestimmten Methoden zur Echtzeit-Verkehrsrekonstruktion und zur modellprädiktiven Regelung des Verkehrssystems anhand der vorhandenen Lichtsignalanlagen. Die Echtzeit-Verkehrsrekonstruktion approximiert dabei simulationsbasiert den aktuellen Verkehrszustand anhand gegebener Messdaten über dynamische Verkehrszuweisungen. Die entwickelte mehrstufige Lichtsignalanlagenregelung nutzt ein Fuzzy-System zur Phasenvorauswahl, um anschließend über eine modellprädiktive Regelung das nichtlineare Problem mit dem Ergebnis der optimalen Kombinationen von Phasen und Schaltzeitpunkten zu lösen. Das Regelungssystem wird in dieser Arbeit anhand eines ausgewählten Verkehrsgebiets zunächst rein simulativ getestet und mit dem vorliegenden Bestandsverfahren verglichen. Im Anschluss an die prototypische Inbetriebnahme wird dieser Vergleich durch die Feldtests abgeschlossen. Entsprechende Ergebnisse zeigen das große Potential der Entwicklung hinsichtlich der Reduktion von Kriterien wie Emissionen oder Wartezeiten und gleichzeitig den Handlungsbedarf für eine standardmäßige Nutzung.}},
  author       = {{Malena, Kevin}},
  isbn         = {{978-3-947647-41-5}},
  keywords     = {{Traffic Light System Control, Model Predictive Control}},
  pages        = {{207}},
  publisher    = {{Heinz Nixdorf Institut, Universität Paderborn}},
  title        = {{{Konzipierung, Analyse und Realumsetzung eines mehrstufigen modellprädiktiven Lichtsignalanlagenregelungssystems}}},
  doi          = {{10.17619/UNIPB/1-2021}},
  volume       = {{422}},
  year         = {{2024}},
}

@misc{56832,
  author       = {{Scharwald, David}},
  title        = {{{Intumeszierende Flammschutzmittel im Lasersinter-Verfahren: Optimierung des Brandschutzes, der mechanischen Eigenschaften und Analyse der Recyclingfähigkeit (Studienarbeit)}}},
  year         = {{2024}},
}

@article{56721,
  author       = {{Mahnken, Rolf and Tchomgue Simeu, Arnold}},
  issn         = {{0045-7825}},
  journal      = {{Computer Methods in Applied Mechanics and Engineering}},
  publisher    = {{Elsevier BV}},
  title        = {{{Downwind and upwind approximations for primal and dual problems of elasto-plasticity with Prandtl–Reuss type material laws}}},
  doi          = {{10.1016/j.cma.2024.117277}},
  volume       = {{432}},
  year         = {{2024}},
}

@phdthesis{56940,
  abstract     = {{Ziel dieser Arbeit ist die Entwicklung eines modellbasierten Beobachters für eingangsaffine, nichtlineare Systeme, der trotz Modellungenauigkeiten eine hohe Schätzgüte erzielt und zusätzlich eine parametrische, physikalisch interpretierbare Darstellung dieser ermöglicht. Diese soll zur automatisierten Verbesserung des Modells verwendet werden. Die vorliegende Arbeit analysiert sowohl Techniken der hybriden Systemidentifikation wie physikalisch motivierte neuronale Netze, als auch Methoden zur Kompensation von Modellungenauigkeiten im Beobachterentwurf. Basierend auf der Analyse wird ein neuartiger, modellbasierter Beobachter entworfen, der Systemzustände und Modellungenauigkeiten gleichzeitig schätzt und insbesondere eine parametrische, physikalisch interpretierbare Darstellung der Ungenauigkeiten erzielt. Diese besteht aus einer Linearkombination von physikalisch interpretierbaren Funktionen, deren dazugehörige, dünnbesetzt modellierte Parameter mithilfe eines augmentierten Zustands parallel zu den Systemzuständen geschätzt werden. Das Novum dieser Arbeit stellt somit die echtzeitfähige Schätzung von Zuständen und Modellungenauigkeiten in physikalisch-technischer Form dar, auf deren Grundlage ein Konzept zur automatisierten Modelladaption umgesetzt wird. Die Applikation der neuartigen Methode ist in der Situation auftretender Systemveränderungen besonders vorteilhaft, da diese zur Laufzeit durch den augmentierten Beobachter
geschätzt und identifiziert werden können. }},
  author       = {{Götte, Ricarda-Samantha}},
  isbn         = {{978-3-947647-42-2}},
  keywords     = {{state estimation, joint estimation, sparsity}},
  title        = {{{Online-Schätzung von Modellungenauigkeiten zur automatischen Modelladaption unter Beibehaltung einer physikalisch-technischen Interpretierbarkeit}}},
  doi          = {{10.17619/UNIPB/1-2066}},
  volume       = {{423}},
  year         = {{2024}},
}