@article{63512, abstract = {{The state of the art shows that PBF-LB/M offers great potential for pressure-loaded parts, with significant weight reductions and simultaneous optimization of flow resistance. This study is aimed at applying existing calculation methods for pressure-loaded parts to additively manufactured pipe structures, considering the two materials EN AC-43000 (3.2381, AlSi10Mg) and AISI 316L (1.4404, X2CrNiMo17-12-2). For this purpose, systematic tensile tests are carried out for both materials. In addition, a statistical evaluation is performed to determine the design-relevant strength characteristics with a survival probability Ps of 97.5 % for both materials in the as-built and heat-treated condition. Pipe specimens are manufactured, half of which are heat treated, geometrically measured and then subjected to a burst pressure test to experimentally determine the failure-critical internal pressure. These results are compared with calculated burst pressures. The calculations are based on the application-relevant methods identified in this study, considering the strength values determined for the respective material condition. This comparison is used to assess the suitability of the calculation methods for additively manufactured pipe structures, based on the materials investigated.}}, author = {{Koers, Thorsten and Magyar, Balázs and Bödger, Christian and Tröster, Thomas}}, issn = {{0308-0161}}, journal = {{International Journal of Pressure Vessels and Piping}}, keywords = {{PBF-LB/M, Pipe structures, Strength assessment, Burst pressure test, Geometrical deviations}}, publisher = {{Elsevier BV}}, title = {{{Analytical and experimental determination of the failure-critical pressure of pipe structures manufactured by PBF-LB/M}}}, doi = {{10.1016/j.ijpvp.2026.105753}}, year = {{2026}}, } @inbook{63674, abstract = {{Der Beitrag konzentriert sich am Beispiel des IVAR Planers auf die virtuellen Einrichtungstools des Einrichtungskonzerns IKEA und fragt danach, welche Politiken des Wohnens und Einrichtens sich aus der Medialität dieser virtuellen Umgebungen ergeben. Anhand von Stefan Riegers Überlegungen zum virtuellen Testen werden diese Planungstools einerseits als auf Dauer gestellte Testumgebungen verstanden, die es den Kund*innen erlauben, das eigene Zuhause – ökologisch wie ökonomisch niederschwellig – virtuell immer wieder einzurichten. Andererseits werden die Anrufungen zur Kreativität, die ständig an die Kund*innen gerichtet werden, in die Überlegungen mit einbezogen, weil sich daraus eine paradoxe Konstellation ergibt: Zum einen sollen so die virtuellen Einrichtungstools kreatives Potenzial und eigenständige Gestaltung aufrufen; zum anderen werden diese Aufrufe aber durch die Medialität der Tools eingehegt und damit zu einem Steuerungsregime.}}, author = {{Cyrkel, Jakob}}, booktitle = {{ComputerWohnen. Zur Geschichte des Computers in Wohnumgebungen zwischen Arbeit und Assistenz}}, editor = {{Bartz, Christina and Cyrkel, Jakob and Hüttemann, Felix and Miggelbrink, Monique}}, isbn = {{978-3-8376-7115-5}}, pages = {{317--331}}, publisher = {{transcript Verlag}}, title = {{{»Inspiration & Planung« am Computer. Virtuelles Wohnen mit dem IVAR Planer}}}, doi = {{10.14361/9783839471159}}, volume = {{66}}, year = {{2026}}, } @book{63673, abstract = {{Unter welchen historischen Bedingungen und mit welchen Auswirkungen wurde der Computer zum Bestandteil des Wohnalltags? Und wie verhält es sich dabei mit Praktiken des Wohnens und Wohnungseinrichtens? Die Beiträger*innen werfen einen Blick auf die Computerisierung des Zuhauses und zeigen, wie sie sich vollzieht. Der Fokus ihrer Analysen liegt einerseits darauf, wie Arbeit und Assistenz das Wohnen im Hinblick auf den Computer prägen. Andererseits denken sie den Computer aus der Perspektive der Wohnumgebungen neu und geben so einen kompakten medienhistorischen Überblick über den Beginn des Smart Homes.}}, editor = {{Bartz, Christina and Cyrkel, Jakob and Hüttemann, Felix and Miggelbrink, Monique}}, isbn = {{978-3-8376-7115-5}}, keywords = {{Mediengeschichte, Digitale Medien, Design, Medien, Medienwissenschaft, Medienästhetik, Mediensoziologie, Medientheorie, Medienphilosophie, Architektur, Technikgeschichte, Technik, Kultur, Kulturwissenschaft, Kulturgeschichte, Kulturtheorie, Popkultur, Geschichte des 20. Jahrhunderts, Geschichtswissenschaft, Kultursoziologie, Gender Studies, Mode, Klang, Cultural Studies, Informatik}}, pages = {{336}}, publisher = {{transcript Verlag}}, title = {{{ComputerWohnen. Zur Geschichte des Computers in Wohnumgebungen zwischen Arbeit und Assistenz}}}, doi = {{10.14361/9783839471159}}, volume = {{66}}, year = {{2026}}, } @article{63676, abstract = {{ Purpose The purpose of this paper is to develop new methods of error representation to improve the accuracy and numerical efficiency of a posteriori and goal-oriented adaptive framework of elastoplasticity with Prandtl–Reuss type material laws. Design/methodology/approach To obtain new methods of error representation for a posteriori and goal-oriented error estimators, weak forms of primal and dual problems are investigated starting with the initial boundary value problem (IBVP). Then, we approximate both problems using temporal discretization. Additionally, we introduce a secant form considering the nonlinearity of elasto-plastic constitutive equations, which is approximated by a tangent form. Finally, we obtain numerical primal and dual solutions and their corresponding error approximations of discretized primal and dual problems, allowing to build several goal-oriented a posteriori error estimators on temporal and spatial adaptive refinement by inserting primal solutions, dual solutions and their error approximations as arguments in residuals of both weak forms as well as in the secant form of the bilinear residual. Findings An elasto-plastic material is investigated in a framework of goal-oriented error estimator by using separately several methods of error representation to deal with either temporal or spatial adaptive refinement, as well as with both refinements leading to an effective reduction of computational effort. Specifically, new error representations based on goal-oriented error estimators are presented and obtained from primal and dual residuals, which use only primal solutions or only dual solutions or a combination of primal and dual solutions as arguments. Error representations obtained from primal residuals and evaluated using only primal arguments do not require the formulation of a dual problem. Research limitations/implications The effectiveness of the different proposed methods is illustrated by an example of a perforated sheet for adaptive spatial refinement where new mesh adaptation methods of error representation are compared against existing mesh adaptation methods such as uniform mesh refinement, mesh refinement based on gradient indicators and adjoint-based methods in literature. The framework generates a balanced mesh consisting of fine, medium and coarse elements for accurate results, avoiding a numerically costly simulation with only fine elements. Originality/value All new proposed methods of error representation successfully estimate actual errors during mesh adaptivity. Furthermore, the proposed methods of error representation allow us to obtain significant reduction and equidistribution of spatial error at the end of the mesh adaptivity process. Their application to a framework of goal-oriented error estimation due to time and mesh adaptivity remains an open issue. }}, author = {{Tchomgue Simeu, Arnold and Caylak, Ismail and Ostwald, Richard}}, issn = {{0264-4401}}, journal = {{Engineering Computations}}, pages = {{1--40}}, publisher = {{Emerald}}, title = {{{Error representations for goal-oriented a posteriori error estimation in elasto-plasticity with applications to mesh adaptivity}}}, doi = {{10.1108/ec-12-2023-0975}}, year = {{2026}}, } @article{63720, abstract = {{The aging behavior of closed-cell polyurethane (PUR) foam, a material widely used in household refrigeration, is studied by examining the variation of cell gas composition and thermal conductivity over time. Aging is primarily driven by gas permeation, wherein the initially present cell gases carbon dioxide and cyclopentane are progressively replaced by nitrogen and oxygen from the ambient, resulting in an increased thermal conductivity and reduced insulation performance. The cell gas composition is measured over 1400 days employing gas chromatography, and the thermal conductivity of the foam is measured over 190 days. Morphological foam characteristics, such as average cell diameter, are determined via scanning electron microscopy and barrier measurements are performed to estimate the effective diffusion coefficient of oxygen. To simulate the aging process, one-dimensional and three-dimensional models are developed for both diffusive mass transfer as well as heat transfer. The present model for the thermal conductivity explicitly accounts for condensation effects, i.e. partial condensation of cyclopentane and carbon dioxide occurring at around 12°C, which significantly influences the insulation behavior of the foam. Sensitivity analyses indicate that an initial cell gas pressure of approximately 0.7 bar yields results that closely coincide with the experimental measurements, where the three-dimensional model demonstrates better accuracy. These measurements and simulations provide valuable insights for evaluating and predicting the long-term degradation of the insulation performance of PUR foams.}}, author = {{Schumacher, Daniel and Guevara-Carrion, Gabriela and Kasper, Tina and Paul, Andreas and Elsner, Andreas and Peters, Bettina and Wollny, Wenke and Bluemel, Marcus and Hoelscher, Heike and Brzoska-Steinhaus, Nicola and Heil, Klaus and Schleelein, Lukas and Becker, Wolfgang and Gries, Ulrich and Vrabec, Jadran}}, issn = {{1359-4311}}, journal = {{Applied Thermal Engineering}}, keywords = {{Polyurethane, Foam, Gas permeation, Diffusion models, Thermal conductivity, Condensation, Gas chromatography, Scanning electron microscopy}}, publisher = {{Elsevier BV}}, title = {{{Aging of polyurethane foam: Experimental analysis and modeling of cell gas composition and thermal conductivity}}}, doi = {{10.1016/j.applthermaleng.2026.129850}}, volume = {{289}}, year = {{2026}}, } @inproceedings{61492, abstract = {{This paper deals with the development and results of a prediction framework for traffic light control systems as well as the usage and benefits of such predictions in green light optimal speed advisory (GLOSA) scenarios. Various machine learning methods like support vector machines, neural networks or reinforcement learning were evaluated for their applicability in the prediction context and compared based on their efficiency and most importantly accuracy. The resulting prediction framework uses decision tree ensemble models combined with certain model knowledge to forecast different control strategies. This method was chosen due to its best performance in various test scenarios. Very high accuracy and fidelity were achieved for standard control methods like fixed-time, time-of-day-based and 'ordinary' traffic-based programs. Only for the more sophisticated model predictive control which was tested lower accuracies were achieved. For the upcoming GLOSA application the penetration of equipped vehicles was varied for different traffic scenarios and control strategies. Results showcase high potentials for enhancing urban mobility and reducing environmental impact by lower emissions and waiting times. However, it is also clear from the studies presented in this contribution that the coordination of the control strategy with the GLOSA vehicles is of enormous importance.}}, author = {{Malena, Kevin and Link, Christopher and Gausemeier, Sandra and Trächtler, Ansgar}}, booktitle = {{2025 IEEE 28th International Conference on Intelligent Transportation Systems (ITSC)}}, keywords = {{ML, Prediction, Tree Ensembles, GLOSA}}, location = {{Gold Coast (Australia)}}, publisher = {{IEEE}}, title = {{{ML-based Prediction Framework for varying Traffic Signal Control Strategies and its GLOSA-application}}}, volume = {{28}}, year = {{2026}}, } @article{63784, author = {{Trienens, Dorte and Brüning, Florian and Schöppner, Volker}}, journal = {{kunststoffland NRW report}}, title = {{{Wo Forschung, KI und Praxis aufeinandertreffen}}}, volume = {{03-2025}}, year = {{2026}}, } @book{63423, author = {{Ribbat, Christoph}}, pages = {{166}}, publisher = {{Insel}}, title = {{{In den Tag: Eine kurze Geschichte des Aufwachens}}}, year = {{2026}}, } @inproceedings{64131, author = {{Hermelingmeier, Lucas and Teutenberg, Dominik and Meschut, Gerson and Korten, Matthias and Urban, Peter and Marquardt, Raphael and Rethmeier, Michael}}, location = {{Köln}}, title = {{{Konzeptentwicklung für eine stahlintenisve zirkuläre und modulare Bauweise elektrisch angetriebener Fahrzeuge}}}, year = {{2026}}, } @article{64158, abstract = {{ABSTRACT Electrification offers a promising route to reduce CO 2 emissions in the chemical sector. In distillation, heat pump integration such as mechanical vapor recompression (MVR) can replace fossil‐based utilities, but column parameters like pressure drop should be accurately considered when assessing integration potential. This work discusses the effect of feed preheating and column pressure drop on MVR integration potential. The two binary separation tasks, methanol–water and benzene–toluene, are analyzed to identify energetically optimal preheater and MVR design. In addition, MVR integration in a bioethanol vacuum distillation sequence is evaluated for utility demand, CO 2 emissions, and economic feasibility under varying pressure drops, preheating configurations, and cost and emission scenarios. }}, author = {{Hochhaus, Thorben and Siepmann, Sebastian and Grünewald, Marcus and Riese, Julia}}, issn = {{0009-286X}}, journal = {{Chemie Ingenieur Technik}}, publisher = {{Wiley}}, title = {{{Impact of Distillation Column Design on Potential for the Integration of Mechanical Vapor Recompression}}}, doi = {{10.1002/cite.70074}}, year = {{2026}}, } @article{64187, abstract = {{Carbon fiber-reinforced plastics (CFRPs) have become increasingly significant in recent decades due to their remarkable mechanical properties and lightweight nature. This study aims to advance the understanding and simulation of CFRP behavior through the development of a hyperelastic-plastic-damage homogenization method combined with mean-field theory. The material responses of both the fiber and matrix are modeled using strain energy functions that account for damage evolution, while a complete linearization of the homogenization process is derived to ensure the consistent implementation of the Newton–Raphson iteration scheme in large deformation simulations. The innovative aspect of this work lies in the constitutive linearization for the hyperelastic-plastic-damage formulation within a mean-field homogenization framework, providing an efficient Newton algorithm for modeling the nonlinear behavior of CFRP. A failure criterion for the hyperelastic model of fibers is introduced, along with a damage saturation variable in rate form for the matrix, effectively capturing damage evolution. Through discrete formulations for the homogenization, the proposed model’s capability is demonstrated via three numerical examples and validated against experimental investigations, proving its effectiveness and reliability in simulating CFRP damage.}}, author = {{Zhan, Yingjie and Caylak, Ismail and Ostwald, Richard and Mahnken, Rolf and Barth, Enrico and Uhlmann, Eckart}}, issn = {{1081-2865}}, journal = {{Mathematics and Mechanics of Solids}}, publisher = {{SAGE Publications}}, title = {{{A fully implicit mean-field damage formulation with consistent linearization at large deformations}}}, doi = {{10.1177/10812865261420809}}, year = {{2026}}, } @phdthesis{64563, abstract = {{Die effiziente Nutzung von Ressourcen ist in der modernen Produktentwicklung von zentraler Bedeutung, nicht nur im Hinblick auf Materialien, sondern auch angesichts des Fachkräftemangels. Dabei sollten menschliche Arbeitskräfte gezielt eingesetzt und unnötige Iterationen zwischen Abteilungen vermieden werden, wobei die Kommunikation zwischen Konstruktion und Berechnung eine entscheidende Rolle spielt. Im Rahmen dieser Arbeit wird eine Methode entwickelt, die es Konstrukteuren ermöglicht, mithilfe künstlicher neuronaler Netze schnell mechanisch optimierte Bauteilgeometrien vorzuschlagen und so Korrekturschleifen zu minimieren. Hierfür wird eine Entwicklungsumgebung analysiert, die die Integration neuronaler Netze in bestehende Konstruktions- und Optimierungsprozesse erlaubt, einschließlich der Definition von Eingaben, Ausgaben, Datenformaten, Datensätzen und Schnittstellen zu kommerzieller Software. Zur Sicher-stellung der generalisierten Nutzbarkeit der Trainingsdaten werden Bauteilgeometrien zunächst mithilfe geometrischer Primitive abstrahiert und anschließend zu Gesamtgeometrien zusammengesetzt. Die Machbarkeitsstudie zeigt, dass mechanisch optimierte Bauteilgeometrien auf diese Weise erfolgreich vorhergesagt werden können. Obwohl noch gewisse Einschränkungen bestehen hinsichtlich der Schnittstellendefinition zwischen den Primitiven oder der Umrechnung von globalen auf lokale Randbedingungen, bietet die Methode eine solide Grundlage für weiterführende Forschungsarbeiten in diesem Bereich.}}, author = {{Ott, Manuel}}, isbn = {{978-3-8191-0488-6}}, pages = {{180}}, publisher = {{Shaker Verlag}}, title = {{{Methodik zum Aufbau einer Entwicklungsumgebung für die datengetriebene Gestaltvorhersage von Bauteilen}}}, volume = {{Volume 2}}, year = {{2026}}, } @article{64159, abstract = {{ABSTRACT Separation processes, such as distillation and stripping, are highly energy‐intensive. Typically, energy is supplied indirectly via a reboiler, which is often associated with heat losses. We present a preliminary theoretical evaluation of a novel concept to supply energy directly inside the column using heatable structured packings. These packings can be produced by multi‐material 3D printing, resulting in a conductive inner layer and an insulating outer layer. Functioning as electric resistance heaters, these packings serve as heating elements. In this numerical study, we compared different scenarios of energy supply along the height of the column, including uniform distribution, applying a temperature profile, and using or omitting a reboiler.}}, author = {{Lutters, Nicole and Brüne, Sascha and Riese, Julia}}, issn = {{0009-286X}}, journal = {{Chemie Ingenieur Technik}}, publisher = {{Wiley}}, title = {{{Preliminary Numerical Evaluation of Directly Heated Structured Packings to be Used for Separation Processes}}}, doi = {{10.1002/cite.70076}}, year = {{2026}}, } @article{63607, author = {{Striewe, Marius and Schmelzle, Lars and Possart, Gunnar and Meschut, Gerson and Mergheim, Julia and Teutenberg, Dominik}}, issn = {{0169-4243}}, journal = {{Journal of Adhesion Science and Technology}}, pages = {{1--38}}, publisher = {{Informa UK Limited}}, title = {{{Analytical parameter identification for a viscoplastic material model for structural adhesive bonds}}}, doi = {{10.1080/01694243.2025.2611999}}, year = {{2026}}, } @article{63821, author = {{Gude, Maik and Meschut, Gerson and Flügge, Wilko and Fröck, Linda and Wald, Christopher and Neßlinger, Vanessa and Dobrindt-Tittmann, Karsten and Troschitz, Juliane and Neubert, Fynn Lucas and Hofmann, Martin and Ostwald, Richard and Mathiszik, Christian and Schmale, Hans Christian and Wallmersperger, Thomas and Grundmeier, Guido}}, issn = {{0143-7496}}, journal = {{International Journal of Adhesion and Adhesives}}, publisher = {{Elsevier BV}}, title = {{{Corrosion of adhesively bonded alloys in maritime environments: A review}}}, doi = {{10.1016/j.ijadhadh.2026.104264}}, volume = {{147}}, year = {{2026}}, } @inproceedings{64130, author = {{Hermelingmeier, Lucas and Teutenberg, Dominik and Meschut, Gerson}}, booktitle = {{26. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Methodenentwicklung zur Ermittlung lokaler Klebschichtzustände innerhalb struktureller Verbindungen}}}, year = {{2026}}, } @inproceedings{64589, author = {{Rodschei, Maxim and Mergheim, Julia and Neubert, Fynn Lucas and Teutenberg, Dominik and Meschut, Gerson}}, booktitle = {{26. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Experimentelle und numerische Untersuchungen zur Alterung von Klebverbindungen unter zyklischer und hygrothermischer Beanspruchung im Stahl- und Anlagenbau}}}, year = {{2026}}, } @inproceedings{64590, author = {{Neubert, Fynn Lucas and Teutenberg, Dominik and Meschut, Gerson}}, booktitle = {{26. Kolloquium: Gemeinsame Forschung in der Klebtechnik}}, location = {{Köln}}, title = {{{Optimierung der induktiven Klebstoff-Schnellhärtung durch numerische Prozesssimulation}}}, year = {{2026}}, } @inproceedings{64593, author = {{Neubert, Fynn Lucas and Teutenberg, Dominik and Meschut, Gerson and Rodschei, Maxim and Mergheim, Julia}}, booktitle = {{DECHEMA-Workshop für Klebstoffanwender: Langzeitverhalten von Klebungen}}, location = {{Köln}}, title = {{{Bewitterung in der Simulation}}}, year = {{2026}}, } @inproceedings{55308, abstract = {{Established companies are undertaking major transformation initiatives of their corporate structures and organisational forms to cope with the complexity during the engineering of cyber-physical production systems (CPPS). A frequently discussed issue is the measurability of this transformation progress. This paper conducts a systematic literature analysis of approaches regarding measurability of transformation and evaluates their application in the context of a systems engineering transformation. Measure-ment criteria are derived from the identified approaches, categorised, and finally evaluated by industry experts regarding their applicability. The categorised measurement criteria can be used to accurately measure the progress of a transformation process.}}, author = {{Gräßler, Iris and Grewe, Benedikt}}, keywords = {{Organizational Transformation, Systems Engineering, Meausrement, Metrics, Organizational Change}}, location = {{Ischia, Italy}}, title = {{{Measuring Systems Engineering Transformation: A systematic literature review}}}, doi = {{https://doi.org/10.1016/j.procir.2026.01.202}}, year = {{2026}}, }