@article{65093,
author = {{Marten, Thorsten and Ostermann, Moritz and Behm, Jonathan and Leitenmaier, Samuel}},
issn = {{21991944}},
journal = {{Berufsbildung - Zeitschrift für Theorie-Praxis-Dialog}},
number = {{1}},
pages = {{23--27}},
publisher = {{wbv Publikation}},
title = {{{NeMo.bil - Individualisierter öffentlicher Personennahverkehr - iÖV}}},
doi = {{10.3278/BB2601}},
volume = {{209}},
year = {{2026}},
}
@inbook{59905,
abstract = {{Um die international und national beschlossenen Klimaziele zu erreichen, müssen die verkehrsbedingten Emissionen in der Bundesrepublik Deutschland drastisch reduziert werden. Hierzu bedarf es einer umfassenden Mobilitätswende, welche die Etablierung emissionsärmerer und effizienterer Mobilitätsformen umfasst. Ein Lösungsansatz können on-demand Dienste bieten, die den öffentlichen Personennahverkehr bedarfsgerecht gestalten und so dessen Akzeptanz steigern. Zahlreiche bisher eingeführte on-demand Dienste mussten jedoch nach Beendigung des Projekt- bzw. Förderzeitraums wieder eingestellt werden. Maßgebliche Herausforderungen waren die Integration der Dienste in die bestehenden ÖPNV- und Mobilitäts-Strukturen sowie teilweise damit einhergehende ökonomische Aspekte. In diesem Beitrag wird eine Methode vorgestellt, welche neben der Einführung neuartiger Mobilitätsdienste auch die Entwicklung eines nachhaltigen Mobilitäts-Ökosystems anstrebt. Der Fokus liegt dabei auf ländlich geprägten Regionen und ihren besonderen Herausforderungen im Bereich des öffentlichen Nahverkehrs. Die Methode beschreibt ein fünf-phasiges Handlungsschema, in welchem Potenziale bestehender Strukturen genutzt, Mobilitäts-Stakeholder eingebunden und verhärtete Mobilitätsverhalten allmählich positiv verändert werden. Anhand der Initiative Neue Mobilität Paderborn wird aufgezeigt, dass mithilfe der Methode erste Schritte hin zu einem Mobilitäts-Ökosystem absolviert werden können. Darüber hinaus werden Einführungsszenarien für die neuartige, sich noch in der Entwicklung befindliche Mobilitätslösung NeMo.bil in einer Beispielregion erarbeitet.}},
author = {{Behm, Jonathan and Ostermann, Moritz and Bomm, Julian and Rahmann, Sören and Tröster, Thomas and Marten, Thorsten}},
booktitle = {{New Players in Mobility}},
isbn = {{9783658464844}},
location = {{Duisburg}},
publisher = {{Springer Fachmedien Wiesbaden}},
title = {{{Einführungsstrategien nachhaltiger on-demand Mobilitätkonzepte im öffentlichen Nahverkehr}}},
doi = {{10.1007/978-3-658-46485-1_36}},
year = {{2025}},
}
@inproceedings{63437,
author = {{Beckmann, Johanna and Bachmann, Andre and Brandes, Philipp and Marten, Thorsten and Tröster, Thomas and Moritzer, Elmar}},
booktitle = {{24th International Conference on Composite Materials (ICCM24)}},
keywords = {{Faser-Kunststoff-Verbunde (FKV), Faserverstärkte Kunststoffe (FVK), Organobleche}},
publisher = {{The University of Delaware}},
title = {{{Validation of Possible Applications of Flake Laminates for Recycling of PA6-CF Production Scrap}}},
doi = {{https://doi.org/10.5281/zenodo.18597865}},
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}},
}
@book{65062,
author = {{Tröster, Thomas and Marten, Thorsten and Luig, Simon}},
isbn = {{978-3-96780-214-6}},
publisher = {{Forschungsvereinigung Stahlanwendung e.V. (FOSTA)}},
title = {{{Methodische Auswahl hochfester Mehrphasenstähle bezüglich ihrer lokalen und globalen Duktilität}}},
volume = {{P 1447}},
year = {{2025}},
}
@article{60210,
abstract = {{Currently, the need for resource efficiency and CO2 reduction is growing in industrial production, particularly in the automotive sector. To address this, the industry is focusing on lightweight components that reduce weight without compromising mechanical properties, which are essential for passenger safety. Hybrid designs offer an effective solution by combining weight reduction with improved mechanical performance and functional integration. This study focuses on a one-step manufacturing process that integrates forming and bonding of hybrid systems using compression molding. This approach reduces production time and costs compared to traditional methods. Conventional Post-Mold Assembly (PMA) processes require two separate steps to combine fiber-reinforced plastic (FRP) structures with metal components. In contrast, the novel In-Mold Assembly (IMA) process developed in this study combines forming and bonding in a single step. In the IMA process, glass-mat-reinforced thermoplastic (GMT) is simultaneously formed and bonded between two metal belts during compression molding. The GMT core provides stiffening and load transmission between the metal belts, which handle tensile and compressive stresses. This method allows to produce hybrid structures with optimized material distribution for load-bearing and functional performance. The process was validated by producing a lightweight hybrid brake pedal. Demonstrating its potential for efficient and sustainable automotive production, the developed hybrid brake pedal achieved a 35% weight reduction compared to the steel reference while maintaining mechanical performance under quasi-static loading}},
author = {{Chalicheemalapalli Jayasankar, Deviprasad and Stallmeister, Tim and Lückenkötter, Julian Janick Stefan and Tröster, Thomas and Marten, Thorsten}},
issn = {{2073-4360}},
journal = {{Polymers}},
number = {{12}},
publisher = {{MDPI AG}},
title = {{{Process Development for Hybrid Brake Pedals Using Compression Molding with Integrated In-Mold Assembly}}},
doi = {{10.3390/polym17121644}},
volume = {{17}},
year = {{2025}},
}
@article{58379,
abstract = {{Injection molding plays a pivotal role in modern manufacturing, enabling the mass production of complex components with high precision. However, traditional tooling methods often face challenges related to thermal management, design constraints, and material efficiency. This study examines the use of additive manufacturing (AM) in the development and optimization of injection molding tools to overcome these limitations. A novel prototype was fabricated using AM techniques, incorporating integrated cooling channels and optimized lattice structures to enhance thermal performance and simplify the manufacturing process. Experimental validation demonstrated the prototype’s effective integration into a vacuum-assisted resin transfer molding (VA-LRTM) system without requiring modifications to existing tooling setups. The results showed significant improvements in temperature regulation, reduced cycle times, and consistent mechanical properties of the molded components compared to conventional approaches. By reducing the number of tool components and eliminating the need for support structures during manufacturing, AM also minimized material waste and post-processing requirements. This research highlights the transformative potential of additive manufacturing in injection molding tool design, offering increased flexibility, cost efficiency, and enhanced functionality to meet the evolving demands of modern industrial applications.}},
author = {{Chalicheemalapalli Jayasankar, Deviprasad and Tröster, Thomas and Marten, Thorsten}},
issn = {{1996-1944}},
journal = {{Materials}},
number = {{3}},
publisher = {{MDPI AG}},
title = {{{Optimizing Injection Molding Tool Design with Additive Manufacturing: A Focus on Thermal Performance and Process Efficiency}}},
doi = {{10.3390/ma18030571}},
volume = {{18}},
year = {{2025}},
}
@inproceedings{62302,
abstract = {{The degree of crosslinking in unidirectional prepreg materials was investigated using differential scanning calorimetry to assess their curing behavior and thermal characteristics. To complement these measurements with a non-destructive, in-situ method, the propagation properties of guided acoustic waves in cured carbon fibre-reinforced epoxy plates were analysed. Correlations between the degree of crosslinking and acoustically determined mechanical properties were drawn to enable a future non-destructive evaluation approach.}},
author = {{Irmak, Hayrettin and Claes, Leander and Wu, Shuang and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{2025 International Congress on Ultrasonics}},
isbn = {{978-3-910600-08-9}},
keywords = {{fibre-reinforced polymers, differential scanning calorimetry, degree of crosslinking, guided waves, ultrasound}},
location = {{Paderborn, Germany}},
pages = {{235–238}},
publisher = {{AMA Service GmbH}},
title = {{{Assessment of the influence of curing parameters on fibre reinforced epoxy composite properties using guided ultrasonic waves}}},
doi = {{10.5162/ultrasonic2025/c13-b3}},
year = {{2025}},
}
@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{57202,
author = {{Ostermann, Moritz and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{16th Biennial International Conference on EcoBalance}},
keywords = {{Life Cycle Sustainability Assessment, Prospective Life Cycle Assessment, Life Cycle Engineering, On-Demand Mobility, Mobility Services}},
location = {{Sendai, Japan}},
title = {{{Prospective Life Cycle Assessment of Lightweight Structures in Vehicles for On-Demand Mobility Systems}}},
year = {{2024}},
}
@inproceedings{57537,
author = {{Ostermann, Moritz and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{Sustainability in Product and Production Engineering}},
location = {{Bad Nauheim}},
publisher = {{Automotive Circle}},
title = {{{Scenario-based life cycle assessment of vehicle lightweight structures}}},
year = {{2024}},
}
@article{55743,
abstract = {{The use of hybrid materials as a combination of fibre-reinforced plastic (FRP) and metal is of great interest in order to meet the increasing demands for sustainability, efficiency, and emission reduction based on the principle of lightweight design. These two components can therefore be joined using the intrinsic joining technique, which is formed by curing the matrix of the FRP component. In this study, for the hybrid joint, unidirectionally pre-impregnated semi-finished products (prepregs) with duromer matrix resin and micro-alloyed HC340LA steel were used. In order to conduct a detailed investigation, the damage mechanisms of intrinsically produced fibre metal laminates (FMLs), a new clamping device, and a novel pressing tool were designed and put into operation. The prepregs were prestressed by applying a preloading force using a specially designed prestressing frame. Hybrid specimens were then produced and subjected to nanoindentation and a shear tensile test. In particular, the effect of the residual stress state by varying the defined prestressing force on the damage mechanisms was studied. The results showed that no fracture patterns occurred in the interface of the specimens without preloading as a result of curing at 120 °C, whereas specimens with preloading failed at the boundary layer in the tensile range. Nevertheless, all specimens cured at 160 °C failed at the boundary layer in the tensile range. Furthermore, it was proven that the force and displacement of the preloaded specimens were promisingly higher than those of the unpreloaded specimens.}},
author = {{Irmak, Hayrettin and Tinkloh, Steffen Rainer and Marten, Thorsten and Tröster, Thomas}},
issn = {{2504-477X}},
journal = {{Journal of Composites Science}},
keywords = {{CFRP, prestressing, fibre metal laminate, interface, prepreg, shear tensile test}},
number = {{8}},
publisher = {{MDPI AG}},
title = {{{Development of a Tool Concept for Prestressed Fibre Metal Laminates and Their Effect on Interface Failure}}},
doi = {{10.3390/jcs8080316}},
volume = {{8}},
year = {{2024}},
}
@inproceedings{48586,
author = {{Lückenkötter, Julian and Aydin, Simon and Marten, Thorsten and Tröster, Thomas}},
location = {{Belfast}},
title = {{{Analysis and Optimization of Joint Formation in Hybrid Compression Molding}}},
year = {{2023}},
}
@inbook{44502,
abstract = {{In order to follow the 1.5 degree path of the Paris Climate Agreement, drastic greenhouse gas reduction measures are needed in the transport sector. The potential of public transport and new mobility services to reduce transport-related greenhouse gas emissions cannot yet be fully exploited, especially in rural regions. This paper presents the concept of an innovative mobility system, called NeMo.bil, that intends to fill the gap between individual and public transport to create a demand-oriented and sustainable mobility offer. The concept is based on convoy formation of autonomously driving lightweight vehicles serving the first and last mile and a larger towing vehicle carrying enough power and energy to move the convoy over longer distances at higher speeds. This combination of two different vehicles, intelligently controlled by a digital ecosystem, aims to significantly increasing energy, resource and cost efficiency. Based on an analysis of previous approaches for innovative mobility solutions, the concept is derived from a technical and sociological perspective and its potential for reducing energy demand is calculated.}},
author = {{Ostermann, Moritz and Behm, Jonathan and Marten, Thorsten and Tröster, Thomas and Weyer, Johannes and Cepera, Kay and Adelt, Fabian}},
booktitle = {{Towards the New Normal in Mobility}},
editor = {{Proff, Heike}},
isbn = {{9783658394370}},
location = {{Duisburg}},
publisher = {{Springer Fachmedien Wiesbaden}},
title = {{{Individualization of Public Transport – Integration of Technical and Social Dimensions of Sustainable Mobility}}},
doi = {{10.1007/978-3-658-39438-7_25}},
year = {{2023}},
}
@article{43464,
abstract = {{Lightweight design is a common approach to reduce energy demand in the use stage of vehicles. The production of lightweight materials is usually associated with an increase in energy demand, so the environmental impacts of lightweight structures need to be assessed holistically using a life cycle assessment. To estimate the life cycle environmental impacts of a product in its developmental stage, for example, by life cycle engineering, future changes in relevant influencing factors must be considered. Prospective life cycle assessment provides methods for integrating future scenarios into life cycle assessment studies. However, approaches for integrating prospective life cycle assessment into product development are limited. The objective of this work is to provide the methodological foundation for integrating future scenarios of relevant influencing factors in the development of lightweight structures. The applicability of the novel methodology is demonstrated by a case study of a structural component in a steel, aluminium, and hybrid design. The results show that appropriate decarbonisation measures can reduce the life cycle greenhouse gas emissions by up to 95 percent until 2050. We also found that shifts in the environmentally optimal design are possible in future scenarios. Therefore, the methodology and data provided contribute to improved decision-making in product development.}},
author = {{Ostermann, Moritz and Grenz, Julian and Triebus, Marcel and Cerdas, Felipe and Marten, Thorsten and Tröster, Thomas and Herrmann, Christoph}},
issn = {{1996-1073}},
journal = {{Energies}},
keywords = {{Life Cycle Engineering, Life Cycle Assessment, Lightweight Design, Prospective LCA, Future-oriented LCA, Energy System, Material production, Sustainable production}},
number = {{8}},
publisher = {{MDPI AG}},
title = {{{Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures}}},
doi = {{10.3390/en16083371}},
volume = {{16}},
year = {{2023}},
}
@inproceedings{44154,
abstract = {{Abstract. Due to an increasing volume of shipments, there is a significant need for more delivery vehicles. One approach to reduce the associated increase in carbon dioxide (CO2) emissions is a new light weight design approach involving the substitution of conventional materials with glass fiber mat-reinforced thermoplastics (GMT) based on polypropylene (PP). The application of GMT by compression molding is a widely used process in the automotive industry. However, application in the commercial vehicle sector requires much larger dimensions, making it necessary to clarify whether the manufacturing process and material are suitable for semi-structural applications on this scale. To find this out, two replacement geometries are abstracted in this study and manufactured by varying the main manufacturing parameters. The feasibility can be demonstrated by recording and analyzing the resulting process variables and measuring the formed fiber distribution. At the end of the paper, recommendations are given for the production of GMT structures on the scale of commercial vehicles. }},
author = {{Lückenkötter, Julian and Leimbach, J.P. and Stallmeister, Tim and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{Materials Research Proceedings}},
issn = {{978-1-64490-247-9}},
keywords = {{Compression Molding, Fiber Content, Process Development, Lightweight Design}},
location = {{Krakow, Poland}},
pages = {{249--258}},
publisher = {{Materials Research Forum LLC}},
title = {{{Feasibility Study of Compression Molding for Large Reinforcement Structures in the Commercial Vehicle Sector}}},
doi = {{10.21741/9781644902479-27}},
volume = {{28}},
year = {{2023}},
}
@article{45782,
abstract = {{The development of automotive components with reduced greenhouse gas (GHG) emissions is needed to reduce overall vehicle emissions. Life Cycle Engineering (LCE) based on Life Cycle Assessment (LCA) supports this by providing holistic information and improvement potentials regarding eco-efficient products. Key factors influencing LCAs of automotive components, such as material production, will change in the future. First approaches for integrating future scenarios for these key factors into LCE already exist, but they only consider a limited number of parameters and scenarios. This work aims to develop a method that can be practically applied in the industry for integrating prospective LCAs (pLCA) into the LCE of automotive components, considering relevant parameters and consistent scenarios. Therefore, pLCA methods are further developed to investigate the influence of future scenarios on the GHG emissions of automotive components. The practical application is demonstrated for a vehicle component with different design options. This paper shows that different development paths of the foreground and background system can shift the ecological optimum of design alternatives. Therefore, future pathways of relevant parameters must be considered comprehensively to reduce GHG emissions of future vehicles. This work contributes to the methodological and practical integration of pLCA into automotive development processes and provides quantitative results.}},
author = {{Grenz, Julian and Ostermann, Moritz and Käsewieter, Karoline and Cerdas, Felipe and Marten, Thorsten and Herrmann, Christoph and Tröster, Thomas}},
issn = {{2071-1050}},
journal = {{Sustainability}},
keywords = {{prospective LCA, life cycle engineering (LCE), lightweight design, automotive components, body parts, circular economy, steel, aluminum, hybrid materials, fiber metal laminates}},
number = {{13}},
publisher = {{MDPI AG}},
title = {{{Integrating Prospective LCA in the Development of Automotive Components}}},
doi = {{10.3390/su151310041}},
volume = {{15}},
year = {{2023}},
}
@inproceedings{42459,
author = {{Ostermann, Moritz and Behm, Jonathan and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{WerkstoffPlus Auto 13. Fachtagung für neue Fahrzeug- und Werkstoffkonzepte}},
location = {{Stuttgart}},
title = {{{NeMo.bil - Dekarbonisierung des Verkehrs mithilfe von Leichtbau-Fahrzeugschwärmen}}},
year = {{2023}},
}
@inproceedings{49436,
author = {{Kaiser, Maximilian Alexander and Reitz, Alexander and Konrad, Stefan and Meyer, Thomas and Marten, Thorsten and Tröster, Thomas}},
booktitle = {{Workshop Warmblechumformung}},
editor = {{Merklein, Marion}},
isbn = {{978-3-00-077160-6}},
keywords = {{Presshärten, resistive Schnellerwärmung, Energieeffizienz}},
location = {{Fürth}},
pages = {{99--118}},
publisher = {{Lehrstuhl für Fertigungstechnologie}},
title = {{{Untersuchung energieeffizienter und serientauglicher Erwärmungsstrategien mittels resistiver Erwärmung für den Presshärteprozess}}},
volume = {{18}},
year = {{2023}},
}
@article{46486,
author = {{Pfeifer, Florian and Knorr, Lukas and Schlosser, Florian and Marten, Thorsten and Tröster, Thomas}},
issn = {{1848-9257}},
journal = {{Journal of Sustainable Development of Energy, Water and Environment Systems}},
keywords = {{Energy Engineering and Power Technology, Water Science and Technology, Environmental Science (miscellaneous), Renewable Energy, Sustainability and the Environment}},
number = {{3}},
pages = {{1--20}},
publisher = {{SDEWES Centre}},
title = {{{Ecological and Economic Feasibility of Inductive Heating for Sustainable Press Hardening Processes}}},
doi = {{10.13044/j.sdewes.d11.0450}},
volume = {{11}},
year = {{2023}},
}