@article{60592,
abstract = {{This study investigates the occurrence and mitigation of liquid metal embrittlement occurring during resistance spot welding in deep-drawn automotive components, specifically focusing on an S-Rail made from advanced high-strength steel. A simulation-based liquid metal embrittlement risk criterion based on local major component stresses was established and used to quantify and compare liquid metal embrittlement risks between different tests. Experimental and numerical analyses were conducted, revealing that springback significantly impacts liquid metal embrittlement formation. Adjustments in electrode geometry and hold time post-welding were found to mitigate liquid metal embrittlement risks. The effects of stack-up configuration and related parameter settings on liquid metal embrittlement occurrence were identified and liquid metal embrittlement was effectively prevented across both stack-up configurations. These findings advance the understanding of liquid metal embrittlement mechanisms and provide practical approaches to enhance the spot weld quality in AHSS-based body-in-whites.}},
author = {{Biegler, Max and Yang, Keke and Meschut, Gerson and Rethmeier, Michael}},
issn = {{1362-1718}},
journal = {{Science and Technology of Welding and Joining}},
publisher = {{SAGE Publications}},
title = {{{Occurrence and avoidance of liquid metal embrittlement in resistance spot welding of springback-afflicted deep-drawn components}}},
doi = {{10.1177/13621718251340452}},
year = {{2025}},
}
@article{60851,
author = {{Ghosh, Koustav and Milaege, Dennis and Steinmeier, Paul and Schaper, Mirko and Hoyer, Kay-Peter and Pramanik, Sudipta}},
issn = {{1059-9495}},
journal = {{Journal of Materials Engineering and Performance}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Effect of Strain Rate on the Deformation Behavior and Energy Absorption Characteristics of LPBF-Processed Ti2448 Microarchitectured Lattice Structures}}},
doi = {{10.1007/s11665-025-11669-6}},
year = {{2025}},
}
@article{60885,
abstract = {{To reduce transport-related environmental impacts, innovative mobility system approaches such as on-demand services are being developed. These can include operating vehicles that differ regarding their characteristics and application profile from privately owned cars in motorized individual transport. Studies on life cycle assessment and life cycle engineering of vehicle lightweight structures are mainly limited to these privately owned cars and the impact category of climate change. In this paper, a method for life cycle assessment-based engineering of lightweight structures in vehicles for various mobility system applications, including on-demand mobility services, is developed. The method enables the holistic life cycle assessment of lightweight structures in different mobility system applications considering parameter changes at the upstream products, component, subsystem, vehicle and mobility system levels, as well as the integration of results into engineering activities. A case study is used to show that the vehicle and mobility system application of lightweight structures can significantly influence their environmental impacts and the selection of ecologically preferable product designs. The application in vehicles for on-demand mobility services can lead to an increase in absolute use stage energy demand and environmental impacts compared to applications in privately owned vehicles for motorized individual transport. However, normalized to the transport performance provided, the lifecycle environmental impacts of structural components in vehicles for on-demand mobility services can be lower than in vehicles for motorized individual transport. The paper contributes methodically and with quantitative results to improved decision making in life cycle engineering activities for lightweight structures in mobility system applications.}},
author = {{Ostermann, Moritz and Dierkes, Eric and Marten, Thorsten and Tröster, Thomas}},
issn = {{2666-7908}},
journal = {{Cleaner Engineering and Technology}},
keywords = {{Life cycle assessment, Life cycle engineering, Lightweight design, On-demand mobility, Shared mobility, Mobility services}},
publisher = {{Elsevier BV}},
title = {{{Life cycle engineering of lightweight structures in vehicles for on-demand mobility services}}},
doi = {{10.1016/j.clet.2025.101058}},
volume = {{28}},
year = {{2025}},
}
@inproceedings{61057,
abstract = {{Verification and Validation (V&V) are essential processes in engineering Cyber-Physical Systems. However, the role of V&V engineers is often not given sufficient attention. Based on a systematic literature analysis and practical observations, a four-step method for Test-oriented Resilient Requirements Engineering (ToRRE) is developed. The steps are planning V&V, executing V&V activities, documenting V&V activities and analyzing results of V&V activities. Applying ToRRE ensures continuous information flow and traceability. Engineers are enabled to analyze requirements using engineering artifacts connected through Model-Based Systems Engineering. Adopting methods for Model-Based Effect Chain analysis to evaluated test cases and test scenarios, conclusions on requirements engineering and change management are enabled. The method is evaluated in an EU research project.}},
author = {{Gräßler, Iris and Ebel, Marcel}},
booktitle = {{Proceedings of the Design Society}},
issn = {{2732-527X}},
keywords = {{systems engineering (SE), product modelling/models, design methods, verification & validation, test cases & test scenarios}},
location = {{Dallas, Texas, USA}},
pages = {{3031--3040}},
publisher = {{Cambridge University Press (CUP)}},
title = {{{Test-oriented Resilient Requirements Engineering (ToRRE): extending model-based effect chain analysis to verification objectives}}},
doi = {{10.1017/pds.2025.10317}},
volume = {{5}},
year = {{2025}},
}
@inproceedings{61060,
abstract = {{In early operational phases of severe weather events, a lack of
information challenges emergency management teams to gain
an overview of the situation and make informed decisions. To
support situational exploration, unmanned aerial and ground
vehicles attract increasing attention, primarily used to
document operational sites. However, they offer further
potential in early operational phases. To ensure their reliable
use for exploration, decision-makers must be aware of
opportunities and limitations under prevailing conditions. For
this, use cases for robotic simulation in emergency response
are presented, considering technical restrictions and dynamic
influences from weather impacts. The approach of integrating
rescue robot simulation into the response phase is developed
following a five-step research design. Existing use cases of
rescue robot simulation are identified in a systematic literature
analysis. The results are extended with use cases developed for
urban flooding scenarios. Subsequently, use cases are assessed
and selected for implementation in the simulation environment
Gazebo. Finally, the results are validated with end users in the
EU research project CREXDATA, which focuses on decision
support based on processing extreme data. The implemented
use cases demonstrate the potential of robotic simulation in
emergency response to accelerate action planning in decisionmaking and provide a more detailed picture, enabling betterinformed decisions. }},
author = {{Gräßler, Iris and Döhner, Niklas and Ebel, Marcel and Pottebaum, Jens}},
booktitle = {{Mensch und Computer 2025 - Workshopband}},
keywords = {{robotic simulation, rescue robots, emergency response, extreme weather}},
location = {{Chemnitz}},
title = {{{Shifting boundaries from preparedness to response: Using simulation of rescue robots in weather-induced emergencies}}},
doi = {{10.18420/muc2025-mci-ws01-187}},
year = {{2025}},
}
@inproceedings{61109,
author = {{Pottebaum, Jens and Gräßler, Iris and Ebel, Marcel and Özcan, Deniz and Döhner, Niklas and Pratzler-Wanczura, Sylvia and Derin, Enes and Krüger, Oliver and Kruijff-Korbayova, Ivana and Stampa, Merlin}},
location = {{Koblenz, Deutschland}},
pages = {{81--94}},
publisher = {{LibreCat University}},
title = {{{EU-Projekt CREXDATA: Erkenntnisse und Handlungsempfehlungen zum Einsatz KI-generierter Lageinformationen für die Lagebewertung und Maßnahmenplanung in Extremwetterlagen}}},
doi = {{10.5281/ZENODO.16740824}},
year = {{2025}},
}
@article{59740,
abstract = {{ABSTRACTIn this contribution, we propose an innovative method for determining optimal control sequences for nonlinear systems with partially unknown dynamics, which further expands our previous work. Within the paradigm of model‐based design, the practicality and safety of commissioning feedforward controls and feedback controllers have priority. Our approach leverages probabilistic Gaussian processes to adjust for model inaccuracies from measured system data. This differs from conventional approaches that involve complicated analytical modeling and may entail a substantial time investment to acquire expertise and may prove impractical. Consequently, we address the limitations inherent in traditional design methodologies. Our research focuses on the formulation and solution of the hybrid1 optimal control problem using probabilistic state predictions and multiple shooting. This ensures adaptability, data efficiency, and resilience against uncertainties in system dynamics. These attributes are empirically substantiated through experimental validation on a chaotic and highly sensitive dynamical system—a double pendulum on a cart. Our methodology unfolds as an iterative learning process, systematically exploring diverse controls, accumulating data within each iteration, and refining the control strategy until the desired task is accomplished. The adoption of the two‐degree‐of‐freedom control structure allows for the distinct consideration of the feedforward and the feedback control signal. For the latter, we employ a time‐variant, linear quadratic regulator (LQR) designed to stabilize the system around its target trajectory. Furthermore, we integrate a probabilistic long‐term prediction through the unscented transform, enabling systematic anticipation of safety‐critical violations. Detailed insights into relevant implementation aspects are provided. To ascertain the real‐world applicability, we present an exemplary application involving a double pendulum on a cart. The objective is to bring the pendulum arms from the lower stable to the upper unstable equilibrium by horizontally moving the cart and subsequently stabilize them. In this scenario, we assume that the centrifugal forces, crucial to the system dynamics, have not been accurately modeled and must be learned from data. Solving the control task took only 5 iterations and 1 h of computation time, which surpasses our previous work [2], where we used the purely data‐driven PILCO framework and required 27 iterations and 57 h of computation time. The time of interaction with the system decreased by and the computation time is lowered by . It demonstrates significant practical applicability for commissioning control systems.}},
author = {{Hesse, Michael and Schwarzer, Luis and Timmermann, Julia and Trächtler, Ansgar}},
issn = {{1617-7061}},
journal = {{PAMM}},
number = {{2}},
publisher = {{Wiley}},
title = {{{Robust and Efficient Hybrid Optimal Control via Gaussian Process Regression and Multiple Shooting With Experimental Validation on a Double Pendulum on a Cart}}},
doi = {{10.1002/pamm.70004}},
volume = {{25}},
year = {{2025}},
}
@article{61139,
author = {{Pfeffer, Nina and Kaiser, Maximilian Alexander and Feix, Werner and Kälble, Nils and Merten, Mathias and Stark, Andreas and Haufe, Andre and Meyer, Thomas and Tröster, Thomas and Höppel, Heinz Werner}},
issn = {{0921-5093}},
journal = {{Materials Science and Engineering: A}},
publisher = {{Elsevier BV}},
title = {{{Energy- and material-efficient Ti-6Al-4V sheet part fabrication by the novel TISTRAQ-process, including resistance heating and tool-based quenching: Insights into test stand design and material potential}}},
doi = {{10.1016/j.msea.2025.149015}},
volume = {{945}},
year = {{2025}},
}
@misc{64894,
abstract = {{This dataset contains experimental measurements of the radial dynamic and quasi-static characteristics of four different types of Rubber-Metal Bushings (RMBs) used in the suspension system of a passenger car under harmonic displacement excitation. For each bushing type, 2–3 individual specimens were tested.
Quasi-static measurements were performed at a constant excitation frequency of 0.05 Hz with varying displacement amplitudes. Dynamic measurements were conducted with displacement amplitudes ranging from 0.04 mm to 0.3 mm and excitation frequencies of 2, 5, 10, ..., up to 100 Hz.
The data is structured by bushing type, measurement mode, amplitude, and frequency, and is provided in *.csv and *.hrm format. It is intended to support further research in modeling rubber-metal bushings and parameter identification techniques.}},
author = {{Schütte, Jan}},
keywords = {{bushing, experimental data, rubber-metal-bushing, Dataset suspension}},
publisher = {{LibreCat University}},
title = {{{Experimental Dataset: Force and Displacement Measurements of Four Rubber-Metal Bushing Types from a Passenger Car under Harmonic Displacement Excitation}}},
doi = {{10.5281/ZENODO.14851317}},
year = {{2025}},
}
@inproceedings{64660,
author = {{Neukötter, Moritz and Jesinghausen, Steffen and Schmid, Hans-Joachim}},
location = {{Nürnberg}},
title = {{{Polymer Suspensions under Uniaxial Extension – A novel Way to Produce Core-Shell-Particles? }}},
year = {{2025}},
}
@article{65011,
abstract = {{Abstract
Design of single screw machines for polymer processing often focuses on the melt dominated areas of the screw. However, solids conveying is a key aspect for processes with high screw speeds, grooved feed sections, small screw diameters and material with low bulk density. In injection moulding, throughput limitations are highly relevant in packaging applications as due to low cooling times, plasticizing affects the cycle time. In addition, insufficient solids conveying is a primary cause for air residues in the melt and final product. Therefore, well-designed feed sections are required, especially as direct processing of regrind in recycling applications becomes more relevant due to governmental restrictions. Existing models for injection moulding are based on analytical equations and do not allow to assess new feed sections and feed opening designs, adapted to high screw speeds or regrind. In this paper, numerical simulations based on the Discrete Element Method (DEM), previously used in the field of extrusion, are carried out. In order to replicate the cyclic, superimposed rotation and translation of the screw, a coupled approach of DEM and Multibody Systems Simulation (MBS) is pursued. To verify the accuracy of such coupled simulations, a special test setup is added to a conventional injection moulding machine. Pure solids conveying is investigated, as DEM does not accommodate for large plastic deformations or melting. Different screw and intake designs as well as smooth and grooved barrels are investigated. Selected resins, pellet shapes and regrind are processed, varying the processing parameters and comparing the results to the simulation. The coupled approach replicates reality well in terms of throughput, confirming that DEM can be utilised to further investigate process phenomena and develop calculation models for solids conveying in injection moulding.}},
author = {{Landgräber, Jan and Schöppner, Volker and Brüning, Florian}},
issn = {{0930-777X}},
journal = {{International Polymer Processing}},
number = {{1}},
pages = {{1--14}},
publisher = {{Walter de Gruyter GmbH}},
title = {{{Assessing solids conveying in injection moulding machines using coupled numerical simulations based on the discrete element method (DEM) and multibody systems (MBS)}}},
doi = {{10.1515/ipp-2025-0065}},
volume = {{41}},
year = {{2025}},
}
@inbook{64984,
author = {{Löhr, Florian and Moritzer, Elmar and Klie, Benjamin and Giese, Ulrich}},
booktitle = {{Technomer 2025 - 29. Fachtagung über Verarbeitung und Anwendung von Polymeren}},
keywords = {{BMC, Duroplast, Kautschuk, Mehrkomponenten, Spritzgießen}},
pages = {{25}},
title = {{{Untersuchung von Kombinationen aus Duroplasten und Elastomeren für den einstufigen 2K-Spritzgießprozess}}},
volume = {{29. Fachtagung über Verarbeitung und Anwendung von Polymeren -Tagungsband, Technische Universität Chemnitz 06. bis 07. November 2025}},
year = {{2025}},
}
@inproceedings{64993,
author = {{Löhr, Florian}},
booktitle = {{AZuR-Kolloquium 2025}},
title = {{{Direkthaftung statt Klebstoff –Verbund von Duroplasten und Kautschuk im 2K-Spritzgießprozess}}},
year = {{2025}},
}
@inbook{64983,
author = {{Löhr, Florian and Moritzer, Elmar and Klie, Benjamin and Giese, Ulrich}},
booktitle = {{International Rubber Conference (IRC) 2025, Bangkok, BITEC; e-abstract book}},
keywords = {{BMC, Duroplast, Kautschuk, Mehrkomponenten, Spritzgießen}},
pages = {{227–228}},
title = {{{Thermoset–Rubber 2K Composite Systems: Material Combinations and Interfacial Reactions in a One-Step Injection Molding Process}}},
year = {{2025}},
}
@article{65007,
author = {{Knaup, Felix and Schöppner, Volker}},
journal = {{International Polymer Processing}},
keywords = {{CFD simulation, melting modeling, melting process, polymer extrusion, single-screw extruder}},
title = {{{Improvement of a numerical two-phase simulation model for single-screw plasticizing extruders based on experimental investigations}}},
doi = {{10.1515/ipp-2025-0072}},
year = {{2025}},
}
@inproceedings{65005,
author = {{Knaup, Felix and Brüning, Florian and Schöppner, Volker}},
booktitle = {{Annual Technical Conference of the Society of Plastics Engineers (ANTEC 2025)}},
keywords = {{Aufschmelzen, Aufschmelzmodellierung, delay zone, extrusion, melting modeling}},
title = {{{Improving an Analytical Model of Melting in Single Screw Extruders considering the Delay Zone Length}}},
year = {{2025}},
}
@inproceedings{65006,
author = {{Knaup, Felix and Brüning, Florian and Schöppner, Volker}},
booktitle = {{Technomer 2025 29. Fachtagung}},
isbn = {{978-3-939382-17-1}},
keywords = {{Aufschmelzen, Aufschmelzmodellierung, Feststoffbett, melting modeling}},
title = {{{Bestimmung der Feststoffbettfestigkeit zur Vorhersage von Feststoffbettbrüchen im Einschneckenextruder}}},
year = {{2025}},
}
@inproceedings{65003,
author = {{Kleinschmidt, Dennis and Schöppner, Volker}},
booktitle = {{RubberCon 2025}},
editor = {{Gummitekniska Förening, Sveriges}},
keywords = {{Kautschuk, Rheologie, Wandgleiten}},
title = {{{Characterization of the wall slip behavior of filled rubber compounds considering the critical wall shear stress}}},
year = {{2025}},
}
@inproceedings{65009,
author = {{Schmidt, Leon and Schöppner, Volker and Brüning, Florian}},
booktitle = {{RubberCon 2025}},
editor = {{Gummitekniska Förening, Sveriges and Swedish, Norwegian and Finnish rubber associations}},
keywords = {{extrusion, Kautschuk, Simulation}},
title = {{{Findings on pinless screw design for rubber extrusion}}},
year = {{2025}},
}
@article{65008,
author = {{Schmidt, Leon and Brüning, Florian}},
journal = {{KGK - Kautschuk Gummi Kunststoffe}},
keywords = {{extrusion, Kautschuk}},
number = {{2/25}},
pages = {{34–40}},
title = {{{Investigation of alternative pinless screw concepts for rubber extrusion}}},
volume = {{78. Jahrgang}},
year = {{2025}},
}