@inproceedings{56357,
  author       = {{Díaz Canales, Edith Benjamina and Avila , Alfredo and Schlüter, Sabine  and Lacayo, Erick and Schlüter, Alexander}},
  booktitle    = {{19th Conference on Sustainable Development of Energy, Water and Environment Systems}},
  location     = {{Rome}},
  publisher    = {{ Faculty of Mechanical Engineering and Naval Architecture, Zagreb}},
  title        = {{{Implementing Strategic Environmental Assessment (SEA) in the Global South, a challenge: Nicaragua as a case study.}}},
  year         = {{2024}},
}

@inproceedings{65052,
  author       = {{Albrecht, Mirko and Bialaschik, Max Oliver and Gehde, Michael and Schöppner, Volker}},
  booktitle    = {{AIP Conference Proceedings}},
  issn         = {{0094-243X}},
  publisher    = {{AIP Publishing}},
  title        = {{{Serial hot gas welding - Heating and welding behaviour of a slot nozzle}}},
  doi          = {{10.1063/5.0192316}},
  volume       = {{3181}},
  year         = {{2024}},
}

@phdthesis{56654,
  abstract     = {{Residual stresses in directly joined laminates made of steel and carbon fiber reinforced epoxy resin reduce the interface and bond strength and thus have to be taken into account for the strength analysis of structural components. For a holistic description of residual stresses, a thermo-chemo-mechanical constitutive model is introduced in the present work and presented for the multi-scale analysis of residual stress patterns. In this context, the analysis of representative unit cells with regular and stochastic distribution of fibers gives information about the associated deformation and stress fields. Dehomogenization at macroscopically highly stressed regions, characterized by local stress peaks, reveals the effect of gradient deformation in the microstructure. Another aspect of this work is the development of FFT-based Galerkin methods, which allows an evaluation of the effect of defect densities, heterogeneities and morphologies on the applicability of the incremental hole drilling method. It could be demonstrated that the incremental hole drilling method is particularly sensitive to defects running along the surface.}},
  author       = {{Tinkloh, Steffen Rainer}},
  isbn         = {{9783757887650}},
  keywords     = {{Hybride Werkstoffverbunde, Eigenspanungen, FFT-basierte Galerkin-Methode, Mikromechanik, Finite-Elemente-Methode}},
  pages        = {{168}},
  publisher    = {{BoD - Books on Demand}},
  title        = {{{Mikromechanische Analyse von Eigenspannungen in direktgefügten kohlenstofffaserverstärkten Kunststoff-Stahl-Schichtverbunden}}},
  year         = {{2024}},
}

@article{57699,
  abstract     = {{<jats:p>The optimization of process parameters in powder Directed Energy Deposition (DED) is essential for achieving consistent, high-quality bead geometries, which directly influence the performance and structural integrity of fabricated components. As a subset of additive manufacturing (AM), the DED process, also referred to as laser metal deposition (LMD), enables precise, layer-by-layer material deposition, making it highly suitable for complex geometries and part repair applications. Critical parameters, such as the laser power, feed rate, powder mass flow, and substrate temperature govern the deposition process, impacting the bead height, width, contact angle, and dilution. Inconsistent control over these variables can lead to defects, such as poor bonding, dimensional inaccuracies, and material weaknesses, ultimately compromising the final product. This paper investigates the effects of various process parameters, specifically the substrate temperature, on bead track geometry in DED processes for stainless steel (1.4404). A specialized experimental setup, integrated within a DED machine, facilitates the controlled thermal conditioning of sample sheets. Using Design of Experiments (DoE) methods, individual bead marks are generated and analyzed to assess geometric characteristics. Regression models, including both linear and quadratic approaches, are constructed to predict machine parameters for achieving the desired bead geometry at different substrate temperatures. Validation experiments confirm the accuracy and reliability of the models, particularly in predicting the bead height, bead width, and contact angle across a broad range of substrate temperatures. However, the models demonstrated limitations in accurately predicting dilution, indicating the need for further refinement. Despite some deviations in measured values, successful fabrication is achieved, demonstrating robust bonding between the bead and substrate. The developed models offer insights into optimizing DED process parameters to achieve desired bead characteristics, advancing the precision and reliability of additive manufacturing technology. Future work will focus on refining the regression models to improve predictions, particularly for dilution, and further investigate non-linear interactions between process variables.</jats:p>}},
  author       = {{Chalicheemalapalli Jayasankar, Deviprasad and Gnaase, Stefan and Lehnert, Dennis and Walter, Artur and Rohling, Robin and Tröster, Thomas}},
  issn         = {{2075-4701}},
  journal      = {{Metals}},
  keywords     = {{additive manufacturing, direct energy deposition, laser metal deposition}},
  number       = {{12}},
  publisher    = {{MDPI AG}},
  title        = {{{Effect of Substrate Temperature on Bead Track Geometry of 316L in Directed Energy Deposition: Investigation and Regression Modeling}}},
  doi          = {{10.3390/met14121353}},
  volume       = {{14}},
  year         = {{2024}},
}

@article{56089,
  abstract     = {{<jats:p>Additive manufacturing (AM) technologies enable near-net-shape designs and demand-oriented material usage, which significantly minimizes waste. This points to a substantial opportunity for further optimization in material savings and process design. The current study delves into the advancement of sustainable manufacturing practices in the automotive industry, emphasizing the crucial role of lightweight construction concepts and AM technologies in enhancing resource efficiency and reducing greenhouse gas emissions. By exploring the integration of novel AM techniques such as selective laser melting (SLM) and laser metal deposition (LMD), the study aims to overcome existing limitations like slow build-up rates and limited component resolution. The study’s core objective revolves around the development and validation of a continuous process chain that synergizes different AM routes. In the current study, the continuous process chain for DMG MORI Lasertec 65 3D’s LMD system and the DMG MORI Lasertec 30 3D’s was demonstrated using 316L and 1.2709 steel materials. This integrated approach is designed to significantly curtail process times and minimize component costs, thus suggesting an industry-oriented process chain for future manufacturing paradigms. Additionally, the research investigates the production and material behavior of components under varying manufacturing processes, material combinations, and boundary layer materials. The culmination of this study is the validation of the proposed process route through a technology demonstrator, assessing its scalability and setting a benchmark for resource-efficient manufacturing in the automotive sector.</jats:p>}},
  author       = {{Chalicheemalapalli Jayasankar, Deviprasad and Gnaase, Stefan and Kaiser, Maximilian Alexander and Lehnert, Dennis and Tröster, Thomas}},
  issn         = {{2075-4701}},
  journal      = {{Metals}},
  keywords     = {{additive manufacturing (AM), selective laser melting (SLM), laser metal deposition (LMD), hybrid manufacturing, process optimization, 316L, 1.2709}},
  number       = {{7}},
  publisher    = {{MDPI AG}},
  title        = {{{Advancements in Hybrid Additive Manufacturing: Integrating SLM and LMD for High-Performance Applications}}},
  doi          = {{10.3390/met14070772}},
  volume       = {{14}},
  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{65119,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  title        = {{{Experimental investigations on anvil-free ultrasonic welding for welding situations with one sided access}}},
  year         = {{2024}},
}

@book{65123,
  abstract     = {{<p> Inhalt Aktuelle rechtliche Rahmenbedingungen TA Luft – Wesentliche Änderungen, Herausforderungen, Konsequenzen in der Praxis und laufende Aktivitäten 1 Die Lösungsmittelbilanz bei VOC Anlagen als Nachweis der Einhaltung des Grenzwertes für diffuse Emissionen The solvent mass balance for VOC installations as verification of compliance with the limit value for fugitive emissions 11 Diffuse Emissionen Dichte Flanschverbindungen – Richtlinie VDI 2290 23 Technik zur Vermeidung und Verminderung von diffusen Emissionen – Regel- und Absperrarmaturen 37 Erstellung der Lösungsmittelbilanz im Kontext der 31. BImSchV – Rechtliche Anforderungen, praktische Herausforderungen und Unsicherheiten Preparation of the solvent balance in the context of the 31. BImSchV - legal requirements, practical challenges and uncertainties 45 Entwicklung einer analytischen Berechnungsmethode zur Auslegung thermoplastischer Flanschsysteme 61 VKA Control - Bewertung von Legionellenemissionen aus Verdunstungskühlanlagen: Neue Erkenntnisse und Methoden 71 Verbrennungsführung und Minderung organischer Emissionen 27. BImSchV versus Klimaschut... </p>}},
  editor       = {{Moritzer, Elmar and Bartmann, Finn and Riedl, Alexander}},
  isbn         = {{9783181024324}},
  publisher    = {{VDI Verlag}},
  title        = {{{Entwicklung einer analytischen Berechnungsmethode zur Auslegung thermoplastischer Flanschsysteme}}},
  doi          = {{10.51202/9783181024324}},
  year         = {{2024}},
}

@inproceedings{65125,
  abstract     = {{<jats:p>"In the course of environmental protection and the amendment of TA Luft, emissions from flange connections must be reduced (to L0.01). The design and calculation of steel flanges is easy to handle with the help of EN 1591-1 and EN 13555. However, these standards are not suitable in their current form for thermoplastic sealing joints, such as those used in natural gas supply. For this reason, lengthy and cost-intensive tests must currently be carried out to verify tightness and strength. The aim of a doctoral project is to develop a time-efficient and cost-effective analytical calculation method based on the existing standards. For this purpose, the energy-elastic material parameters of the steel must be replaced by elastoplastic material parameters of the thermoplastics and the calculation algorithm adapted accordingly. The problem is to be investigated with the aid of numerical structural simulations (FEM) and experimental tests."</jats:p>}},
  author       = {{Bartmann, Finn and Riedl, Alexander and Moritzer, Elmar}},
  booktitle    = {{22nd International Sealing Conference 2024}},
  publisher    = {{VDMA Fluidtechnik}},
  title        = {{{Development of an analytical calculation method for the design of thermoplastic flange systems}}},
  doi          = {{10.61319/pqdsdeu6}},
  year         = {{2024}},
}

@inproceedings{59159,
  author       = {{Moritzer, Elmar and Held, Christian}},
  booktitle    = {{DVS Plenarsitzung AG W4 Fügen von Kunststoffen}},
  publisher    = {{DVS}},
  title        = {{{Direktverschraubung additiv gefertigter Kunststoffbauteile}}},
  year         = {{2024}},
}

@inbook{48643,
  author       = {{Akbulut Irmak, Emine Fulya and Hanses, Hendrik and Horwath, Ilona and Tröster, Thomas}},
  booktitle    = {{Climate Protection, Resource Efficiency, and Sustainable Engineering}},
  isbn         = {{9783837663778}},
  issn         = {{2703-1543}},
  publisher    = {{transcript Verlag}},
  title        = {{{Case Study III: Challenges of lightweight design, vehicles, and rescuers}}},
  doi          = {{10.14361/9783839463772-006}},
  year         = {{2023}},
}

@inproceedings{48672,
  author       = {{Schöppner, Volker and Gevers, Karina and Schraa, L. and Töws, P. and Uhlig, K. and Stommel, M. and Decker, J.}},
  location     = {{Singapur (Singapur)}},
  title        = {{{Evaluation of the effects of different heating strategies on the joining partners during infrared welding of black polyamides}}},
  year         = {{2023}},
}

@article{48671,
  author       = {{Schöppner, Volker and Gevers, Karina and Schraa, L. and Uhlig, K. and Töws, P. and Decker, J. and Stommel, M.}},
  journal      = {{Proceedings of the 2023 International Conference on Composite Materials}},
  title        = {{{Evaluation of Infrared Welded Joints of Short Fiber Reinforced Thermoplastics Using Digital Image Correlation}}},
  year         = {{2023}},
}

@article{48665,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  issn         = {{1864-3450}},
  journal      = {{Joining Plastics}},
  number       = {{17}},
  pages        = {{20--27}},
  title        = {{{Entwicklung von Scale-Up-Regeln für das quasisimultane Laserdurchstrahlschweißen (QSS) von Thermoplasten}}},
  year         = {{2023}},
}

@inproceedings{48662,
  author       = {{Schöppner, Volker and Petzke, J.}},
  location     = {{Denver, CO (USA)}},
  title        = {{{Dielectric Heating in the Vulcanization Process of Rubber Extrudates}}},
  year         = {{2023}},
}

@inproceedings{48663,
  author       = {{Moritzer, Elmar and Held, Christian}},
  location     = {{Essen (Deutschland)}},
  title        = {{{Direktverschraubung additiv gefertigter Kunststoffbauteile}}},
  year         = {{2023}},
}

@article{48751,
  author       = {{Schöppner, Volker and Gevers, Karina and Hoenen, N. and Uhlig, K. and Töws, P. and Decker, J. and Stommel, M.}},
  journal      = {{Advanced Structured Materials}},
  title        = {{{Simulation of Infrared Welded Short Fiber Reinforced Thermoplastic Parts based on Mori-Tanaka Homogenization Method}}},
  year         = {{2023}},
}

@article{48754,
  author       = {{Schöppner, Volker and Austermeier, Laura and Trienens, Dorte}},
  issn         = {{1618-8357}},
  journal      = {{Wissenschaftlicher Arbeitskreis Kunststofftechnik}},
  pages        = {{62--66}},
  title        = {{{Verbesserung der Betriebspunktauslegung durch Schneckensimulation}}},
  year         = {{2023}},
}

@inproceedings{48752,
  author       = {{Moritzer, Elmar and Scholle, Maximilian}},
  location     = {{St. Gallen (Schweiz)}},
  title        = {{{The main factors influencing glass fiber shortening in the processing of bulk molding compounds (BMC)}}},
  year         = {{2023}},
}

@inproceedings{48748,
  author       = {{Köllermeier, Jonas and Schöppner, Volker}},
  location     = {{Ilmenau (Deutschland)}},
  title        = {{{Optimizing the Processing Performance of a Single Screw Extruder Using Live Simulations Based on Real Time Experimental Data}}},
  year         = {{2023}},
}