@article{44163,
author = {{Rehlaender, Philipp and Wallscheid, Oliver and Schafmeister, Frank and Böcker, Joachim}},
issn = {{0885-8993}},
journal = {{IEEE Transactions on Power Electronics}},
keywords = {{Electrical and Electronic Engineering}},
number = {{11}},
pages = {{13413--13427}},
publisher = {{Institute of Electrical and Electronics Engineers (IEEE)}},
title = {{{LLC Resonant Converter Modulations for Reduced Junction Temperatures in Half-Bridge Mode and Transformer Flux in the On-the-Fly Morphing Thereto}}},
doi = {{10.1109/tpel.2022.3180758}},
volume = {{37}},
year = {{2022}},
}
@article{33724,
author = {{Vieth, Pascal and Borgert, Thomas and Homberg, Werner and Grundmeier, Guido}},
issn = {{1438-1656}},
journal = {{Advanced Engineering Materials}},
keywords = {{Condensed Matter Physics, General Materials Science}},
publisher = {{Wiley}},
title = {{{Assessment of mechanical and optical properties of Al 6060 alloy particles by removal of contaminants}}},
doi = {{10.1002/adem.202201081}},
year = {{2022}},
}
@book{44199,
author = {{Chudalla, Nick and Meschut, Gerson and Teutenberg, Dominik and Wibbeke, Michael and Bartley, Aurélie}},
isbn = {{978-3-96780-135-4}},
publisher = {{Forschungsvereinigung Stahlanwendung e. V.}},
title = {{{Analyse des Versagensverhaltens geklebter Stahl- Verbindungen beim werkstoffschonenden Entfügen in der Karosserieinstandsetzung}}},
year = {{2022}},
}
@inproceedings{34096,
author = {{Gräßler, Iris and Roesmann, Daniel and Hillebrand, Stefan and Pottebaum, Jens}},
booktitle = {{Procedia CIRP ICME}},
issn = {{2212-8271}},
keywords = {{General Medicine}},
location = {{Gulf of Naples}},
pages = {{489--494}},
publisher = {{Elsevier BV}},
title = {{{Information Model for Hybrid Prototyping in Design Reviews of Assembly Stations}}},
doi = {{10.1016/j.procir.2022.09.054}},
volume = {{112}},
year = {{2022}},
}
@book{44209,
author = {{Schmolke, Tobias and Meschut, Gerson and Vieth, Pascal and Meinderink, Dennis and Grundmeier, Guido}},
publisher = {{Forschungsvereinigung Stahlanwendung e. V.}},
title = {{{Entwicklung einer Methode zur Bewertung einer stahlintensiven Mischbau-Klebverbindung eines Batteriegehäuses gegenüber mechanischer und medialer Belastung unter Berücksichtigung der Interphasenstruktur }}},
year = {{2022}},
}
@book{44213,
author = {{Göddecke, Johannes and Meschut, Gerson and Kötz, Fabian and Matzenmiller, Anton and Damm, Jannis and Albiez, Matthias and Ummenhofer, Thomas}},
isbn = {{978-3-96780-137-8}},
pages = {{404}},
publisher = {{Forschungsvereinigung Stahlanwendung e.V.}},
title = {{{Experimentelle und numerische Untersuchung der Dämpfungseigenschaften geklebter Strukturen unter dynamischer Beanspruchung}}},
year = {{2022}},
}
@article{34228,
author = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Inguva, Venkatesh and Kenig, Eugeny Y.}},
isbn = {{978-88-95608-95-2}},
issn = {{2283-9216}},
journal = {{Chemical Engineering Transactions}},
location = {{Mailand, Italien}},
pages = {{175--180}},
title = {{{A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids}}},
doi = {{10.3303/CET2296030}},
volume = {{96}},
year = {{2022}},
}
@inproceedings{33485,
author = {{Dechert, Christopher and Kenig, Eugeny}},
booktitle = {{Proceedings of the 12th international conference Distillation & Absorption 2022}},
location = {{Toulouse, France}},
title = {{{CFD-Based Investigation of the Packing Microstructure Influence on Droplet Behavior and Film Flow}}},
year = {{2022}},
}
@inproceedings{31223,
author = {{Mügge, Nils and Kronberg, Alexander and Glushenkov, Maxim and Kenig, Eugeny}},
booktitle = {{Heat Powered Cycles Conference 2022}},
location = {{Bilbao, Spain}},
title = {{{On Heat Regeneration Limitations in Heat Engines With Dense Working Fluids}}},
year = {{2022}},
}
@article{34216,
abstract = {{Mechanical joining technologies are increasingly used in multi-material lightweight constructions and offer opportunities to create versatile joining processes due to their low heat input, robustness to metallurgical incompatibilities and various process variants. They can be categorised into technologies which require an auxiliary joining element, or do not require an auxiliary joining element. A typical example for a mechanical joining process with auxiliary joining element is self-piercing riveting. A wide range of processes exist which are not requiring an auxiliary joining element. This allows both point-shaped (e.g., by clinching) and line-shaped (e.g., friction stir welding) joints to be produced. In order to achieve versatile processes, challenges exist in particular in the creation of intervention possibilities in the process and the understanding and handling of materials that are difficult to join, such as fiber reinforced plastics (FRP) or high-strength metals. In addition, predictive capability is required, which in particular requires accurate process simulation. Finally, the processes must be measured non-destructively in order to generate control variables in the process or to investigate the cause-effect relationship. This paper covers the state of the art in scientific research concerning mechanical joining and discusses future challenges on the way to versatile mechanical joining processes.}},
author = {{Meschut, Gerson and Merklein, M. and Brosius, A. and Drummer, D. and Fratini, L. and Füssel, U. and Gude, M. and Homberg, Werner and Martins, P.A.F. and Bobbert, Mathias and Lechner, M. and Kupfer, R. and Gröger, B. and Han, Daxin and Kalich, J. and Kappe, Fabian and Kleffel, T. and Köhler, D. and Kuball, C.-M. and Popp, J. and Römisch, D. and Troschitz, J. and Wischer, Christian and Wituschek, S. and Wolf, M.}},
issn = {{2666-3309}},
journal = {{Journal of Advanced Joining Processes}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
publisher = {{Elsevier BV}},
title = {{{Review on mechanical joining by plastic deformation}}},
doi = {{10.1016/j.jajp.2022.100113}},
volume = {{5}},
year = {{2022}},
}
@article{43433,
abstract = {{Ziel dieser Studie ist es den digitalen moodlegestützten asynchronen Sprachkurs Fachspezifisches Chinesisch für das „Maschinenbau in China Programm“ (mb-cn) der Fakultät für Maschinenbau der Universität Paderborn zu evaluieren, um Handlungsempfehlungen für zukünftig ähnlich aufgebaute Projekte zu entwickeln. Dazu wurden im Sommersemester 2021 sechs leitfadengestützte Interviews geführt. Die Interviews wurden anschließend mithilfe von deduktiv ermittelten Kategorien, die sich aus dem Technology Acceptance Model 2 (TAM2) nach Venkatesh und Davis (2000) ergaben, nach Mayring (2015) analysiert, um abschließend die Forschungsfrage zu beantworten: „Wie bewerten mb-cn Ingenieurstudierende die wahrgenommene Nützlichkeit der digitalen Sprachlernangebote des Kurses Fachspezifisches Chinesisch?“.}},
author = {{Hambach, Dennis}},
journal = {{ die hochschullehre. Interdisziplinäre Zeitschrift für Hochschule und Lehre}},
keywords = {{Technology Acceptance Model, Fachspezifische Chinesischsprachkurse, digitale Lehre, Moodle, Evaluation}},
number = {{8}},
pages = {{1--15}},
publisher = {{wbv Publikation}},
title = {{{Evaluation eines digitalen Fachspezifischen Chinesischsprachkurses für Studierende des Ingenieurwesens}}},
doi = {{10.3278/HSL2249W}},
year = {{2022}},
}
@article{34243,
abstract = {{ In view of economic and ecological trends, the concepts for lightweight construction in transport systems are becoming increasingly important. These are frequently applied in the form of multi-material systems, which are characterized by the selective use of materials and geometries. One major challenge in the manufacturing of multi-material systems is the joining of the individual components to form a complete system. Mechanical joining processes such as semi-tubular self-piercing riveting are frequently used for this application but reach their limits concerning the number of combinations of geometry and material. In order to react to the requirements and to increase the versatility of semi-tubular self-pierce riveting, a process combination consisting of a tumbling process and a self-pierce riveting process has been presented previously. This process combination is used in this work to investigate the versatility and to identify the influencing parameters on it. For this purpose, experiments are conducted to identify process-side influence possibilities. The tests are performed with a dual-phase steel aluminum alloy to represent the varying mechanical characteristics of multi-material systems. Furthermore, the initial sheet thicknesses of the joining partners are varied in several steps. In addition to the geometric joint formation used to describe the undercut, the rivet head end position and the residual sheet thickness, the joining process, is also analyzed during the investigations. Further, the innovative joining process is evaluated by comparing it with a conventional self-piercing riveting process. The knowledge obtained represents a basis for the identification and evaluation of the versatility of the process combination. }},
author = {{Wituschek, Simon and Kappe, Fabian and Meschut, Gerson and Lechner, Michael}},
issn = {{1464-4207}},
journal = {{Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications}},
keywords = {{Mechanical Engineering, General Materials Science}},
publisher = {{SAGE Publications}},
title = {{{Geometric and mechanical joint characterization of conventionally and tumbled self-piercing riveting joints}}},
doi = {{10.1177/14644207221135400}},
year = {{2022}},
}
@article{29891,
author = {{Gräßler, Iris and Preuß, Daniel and Pottebaum, Jens}},
issn = {{0720-8928}},
journal = {{Softwaretechnik-Trends}},
number = {{1}},
pages = {{15--16}},
publisher = {{Köllen Druck & Verlag GmbH}},
title = {{{Extrahierung von Anforderungen aus natürlich-sprachlichen Lastenheften: Was erschwert eine KI-basierte Extrahierung?}}},
volume = {{42}},
year = {{2022}},
}
@article{29719,
author = {{Borgert, Thomas and Homberg, Werner}},
issn = {{2352-4847}},
journal = {{Energy Reports}},
keywords = {{General Energy}},
pages = {{399--404}},
publisher = {{Elsevier BV}},
title = {{{Energy saving potentials of an efficient recycling process of different aluminum rejects}}},
doi = {{10.1016/j.egyr.2022.01.027}},
volume = {{8}},
year = {{2022}},
}
@article{32275,
author = {{Meschut, G. and Merklein, M. and Brosius, A. and Drummer, D. and Fratini, L. and Füssel, U. and Gude, M. and Homberg, W. and Martins, P.A.F. and Bobbert, M. and Lechner, M. and Kupfer, R. and Gröger, B. and Han, D. and Kalich, J. and Kappe, F. and Kleffel, T. and Köhler, D. and Kuball, C.-M. and Popp, J. and Römisch, D. and Troschitz, J. and Wischer, C. and Wituschek, S. and Wolf, M.}},
issn = {{2666-3309}},
journal = {{Journal of Advanced Joining Processes}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
publisher = {{Elsevier BV}},
title = {{{Review on mechanical joining by plastic deformation}}},
doi = {{10.1016/j.jajp.2022.100113}},
volume = {{5}},
year = {{2022}},
}
@article{34242,
author = {{Neuser, Moritz and Kappe, Fabian and Ostermeier, Jakob and Krüger, Jan Tobias and Bobbert, Mathias and Meschut, Gerson and Schaper, Mirko and Grydin, Olexandr}},
issn = {{1438-1656}},
journal = {{Advanced Engineering Materials}},
keywords = {{Condensed Matter Physics, General Materials Science}},
number = {{10}},
publisher = {{Wiley}},
title = {{{Mechanical Properties and Joinability of AlSi9 Alloy Manufactured by Twin‐Roll Casting}}},
doi = {{10.1002/adem.202200874}},
volume = {{24}},
year = {{2022}},
}
@inproceedings{30292,
abstract = {{The spinning process is a flexible incremental forming process for the manufacturing of axially-symmetric sheet metal or tubular components with functionally graded properties. It is characterized by the utilization of universal tooling geometries and quite low forming forces. The process has a high potential to reduce material waste, to extend the forming limits and to achieve more complex geometries as well as favorable part properties [1]. Current research work at the Chair of Forming Technology (LUF) is focused on innovative flow-turning processes that have a high potential for producing flat components with excellent geometrical and mechanical properties while keeping process times short [2]. In combination with process-integrated local heat treatment, the new spinning process is predestined for the efficient forming of ultra-high-strength steel or tailored materials. Due to the desired field of food industry only food-safe materials such as special stainless steels are being investigated. This paper presents an innovative machine layout as well as an adequate process design for the production of high-performance circular knives with optimized mechanical hardness. In this context, particular attention is paid to various areas of temperature control as well as process-related challenges during the process.}},
author = {{Engemann, David and Homberg, Werner}},
keywords = {{Cutting blades, Flow-forming, Incremental forming, Hot Forming, High strength steels}},
location = {{Braga - Portugal}},
title = {{{Hot Spinning of Cutting Blades for Food Industry}}},
year = {{2022}},
}
@article{31360,
abstract = {{The adaptive joining process employing friction-spun joint connectors (FSJC) is a promising method for the realization of adaptable joints and thus for lightweight construction. In addition to experimental investigations, numerical studies are indispensable tools for its development. Therefore, this paper includes an analysis of boundary conditions for the spatial discretization and mesh modeling techniques, the material modeling, the contact and friction modeling, and the thermal boundary conditions for the finite element (FE) modeling of this joining process. For these investigations, two FE models corresponding to the two process steps were set up and compared with the two related processes of friction stir welding and friction drilling. Regarding the spatial discretization, the Lagrangian approach is not sufficient to represent the deformation that occurs. The Johnson-Cook model is well suited as a material model. The modeling of the contact detection and friction are important research subjects. Coulomb’s law of friction is not adequate to account for the complex friction phenomena of the adaptive joining process. The thermal boundary conditions play a decisive role in heat generation and thus in the material flow of the process. It is advisable to use temperature-dependent parameters and to investigate in detail the influence of radiation in the entire process.}},
author = {{Oesterwinter, Annika and Wischer, Christian and Homberg, Werner}},
issn = {{2075-4701}},
journal = {{Metals}},
keywords = {{General Materials Science, Metals and Alloys}},
number = {{5}},
publisher = {{MDPI AG}},
title = {{{Identification of Requirements for FE Modeling of an Adaptive Joining Technology Employing Friction-Spun Joint Connectors (FSJC)}}},
doi = {{10.3390/met12050869}},
volume = {{12}},
year = {{2022}},
}
@article{37647,
abstract = {{Mechanical joining processes are an essential part of modern lightweight construction. They permit materials of different types to be joined in a way that is suitable for the loads involved. These processes reach their limits, however, as soon as the boundary conditions change. In most cases, these elements are specially adapted to the joining point and cannot be used universally. Changes require cost-intensive adaptation of both the element and the process control, thus making production more complex. This results in high costs due to the increased number of auxiliary joining element variants required and reduces the economic efficiency of mechanical joining. One approach to overcoming this issue is the use of adaptive auxiliary joining elements formed by friction spinning. This article presents the current state of research on pre-hole-free joining with adaptive joining elements. The overall process chain is illustrated, explained and analyzed. Special attention is paid to demonstrating the feasibility of pre-hole-free joining with adaptive joining elements. The chosen mechanical parameters are subsequently listed. Finally, a comprehensive outlook of the future development potential is derived.}},
author = {{Wischer, Christian and Homberg, Werner}},
issn = {{1662-9795}},
journal = {{Key Engineering Materials}},
keywords = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
pages = {{1468--1478}},
publisher = {{Trans Tech Publications, Ltd.}},
title = {{{Further Development of an Adaptive Joining Technique Based on Friction Spinning to Produce Pre-Hole-Free Joints}}},
doi = {{10.4028/p-1n6741}},
volume = {{926}},
year = {{2022}},
}
@article{30885,
abstract = {{High-speed forming processes such as electromagnetic forming (EMF) and electrohydraulic forming (EHF) have a high potential for producing lightweight components with complex geometries, but the forming zone is usually limited to a small size for equipment-related reasons. Incremental strategies overcome this limit by using a sequence of local deformations to form larger component areas gradually. Hence, the technological potential of high-speed forming can be exploited for large-area components too. The target-oriented process design of such incremental forming operations requires a deep understanding of the underlying electromagnetic and electrohydraulic forming processes. This article therefore analyzes and compares the influence of fundamental process parameters on the acting loads, the resulting course of deformation, and the forming result for both technologies via experimental and numerical investigations. Specifically, it is shown that for the EHF process considered, the electrode distance and the discharge energy have a significant influence on the resulting forming depth. In the EHF process, the largest forming depth is achieved directly below the electrodes, while the pressure distribution in the EMF depends on the fieldshaper used. The energy requirement for the EHF process is comparatively low, while significantly higher forming speeds are achieved with the EMF process.}},
author = {{Heggemann, Thomas and Psyk, Verena and Oesterwinter, Annika and Linnemann, Maik and Kräusel, Verena and Homberg, Werner}},
issn = {{2075-4701}},
journal = {{Metals}},
number = {{4}},
title = {{{Comparative Analysis of Electrohydraulic and Electromagnetic Sheet Metal Forming against the Background of the Application as an Incremental Processing Technology}}},
doi = {{10.3390/met12040660}},
volume = {{12}},
year = {{2022}},
}