@article{52802,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Currently, the fused deposition modeling (FDM) process is the most common additive manufacturing technology. The principle of the FDM process is the strand wise deposition of molten thermoplastic polymers, by feeding a filament trough a heated nozzle. Due to the strand and layer wise deposition the cooling of the manufactured component is not uniform. This leads to dimensional deviations which may cause the component to be unusable for the desired application. In this paper, a method is described which is based on the shrinkage compensation through the adaption of every single raster line in components manufactured with the FDM process. The shrinkage compensation is based on a model resulting from a DOE which considers the main influencing factors on the shrinkage behavior of raster lines in the FDM process. An in‐house developed software analyzes the component and locally applies the shrinkage compensation with consideration of the boundary conditions, e.g., the position of the raster line in the component and the process parameters. Following, a validation using a simple geometry is conducted to show the effect of the presented adaptive scaling method.</jats:p>}},
  author       = {{Moritzer, Elmar and Hecker, Felix}},
  issn         = {{1022-1360}},
  journal      = {{Macromolecular Symposia}},
  keywords     = {{Materials Chemistry, Polymers and Plastics, Organic Chemistry, Condensed Matter Physics}},
  number       = {{1}},
  publisher    = {{Wiley}},
  title        = {{{Adaptive Scaling of Components in the Fused Deposition Modeling Process}}},
  doi          = {{10.1002/masy.202200181}},
  volume       = {{411}},
  year         = {{2023}},
}

@inproceedings{52801,
  author       = {{Altepeter, Matthias and Wanke, Sven and Schöppner, Volker}},
  booktitle    = {{INTERNATIONAL CONFERENCE ON HUMANS AND TECHNOLOGY: A HOLISTIC AND SYMBIOTIC APPROACH TO SUSTAINABLE DEVELOPMENT: ICHT 2022}},
  issn         = {{0094-243X}},
  publisher    = {{AIP Publishing}},
  title        = {{{Analysis and modelling of the material degradation of polypropylene on the co-rotating twin-screw extruder}}},
  doi          = {{10.1063/5.0135824}},
  year         = {{2023}},
}

@article{48657,
  author       = {{Moritzer, Elmar and Tölle, Lisa and Greb, C. and Haag, M.}},
  issn         = {{2504-477X}},
  journal      = {{Journal of Composites Science}},
  number       = {{7}},
  pages        = {{267}},
  title        = {{{Conceptions and Feasibility Study of Fiber Orientation in the Melt as Part of a Completely Circular Recycling Concept for Fiber-Reinforced Thermoplastics}}},
  doi          = {{10.3390/jcs7070267}},
  year         = {{2023}},
}

@article{48750,
  author       = {{Schöppner, Volker and Altepeter, Matthias and Austermeier, Laura and Wanke, Sven and Meinheit, Philipp}},
  journal      = {{Polymers 2023}},
  number       = {{15(9)}},
  pages        = {{2181}},
  title        = {{{Polypropylene Degradation on Co-Rotating Twin-Screw Extruders}}},
  doi          = {{10.3390/polym15092181}},
  year         = {{2023}},
}

@inproceedings{34736,
  author       = {{Schöppner, Volker and Frank, Maximilian}},
  location     = {{Fukuoka}},
  title        = {{{Investigation of the Homogenization Performance of Various Faceted Mixers and Optimization with Regard to Mixing as well as Pressure Throughput Behavior}}},
  doi          = {{10.1063/5.0135825}},
  year         = {{2023}},
}

@inproceedings{29946,
  author       = {{Schall, Christoph Wilhelm Theodor and Schöppner, Volker}},
  booktitle    = {{PPS36}},
  keywords     = {{Computing Resources Provided by the Paderborn Center for Parallel Computing}},
  title        = {{{Design of a test bench for measuring the degradation behavior of plastics during processing}}},
  year         = {{2023}},
}

@article{48742,
  author       = {{Schöppner, Volker and Schall, Christoph Wilhelm Theodor}},
  journal      = {{Materials}},
  number       = {{16(17)}},
  pages        = {{5891}},
  title        = {{{Material Characterization of Polypropylene and Polystyrene Regarding Molecular Degradation Behavior}}},
  doi          = {{10.3390/ma16175891}},
  year         = {{2023}},
}

@article{48654,
  author       = {{Moritzer, Elmar and Held, Christian}},
  issn         = {{0043-2288}},
  journal      = {{Welding in the World}},
  title        = {{{Characterization of additively manufactured parts for direct screwing}}},
  doi          = {{10.1007/s40194-023-01610-7}},
  year         = {{2023}},
}

@article{48659,
  author       = {{Trienens, Dorte and Schöppner, Volker and Bunse, Robin}},
  journal      = {{Polymers 2023}},
  title        = {{{Determination of Correlations between Melt Quality and the Screw Performance Index in the Extrusion Process}}},
  doi          = {{https://doi.org/10.3390/polym15163427}},
  year         = {{2023}},
}

@article{48737,
  author       = {{Schöppner, Volker and Kleinschmidt, Dennis}},
  journal      = {{SPE Polymers}},
  pages        = {{1--17}},
  title        = {{{Improvement of a method for the correction of wall slip effects within the rheological measurements of filled rubber compounds}}},
  year         = {{2023}},
}

@article{52828,
  author       = {{Brüning, Florian and Kleinschmidt, Dennis and Petzke, J.}},
  issn         = {{https://doi.org/10.3390/polym15224406}},
  journal      = {{Polymers}},
  pages        = {{1--23}},
  title        = {{{Wall Slip-Free Viscosity Determination of Filled Rubber Compounds Using Steady-State Shear Measurements}}},
  doi          = {{https://doi.org/10.3390/polym15224406}},
  year         = {{2023}},
}

@article{52833,
  author       = {{Schöppner, Volker and Austermeier, Laura and Brüning, Florian and Oldemeier, Jan Philipp and Brandt, O.}},
  issn         = {{2190-4774}},
  journal      = {{EXTRUSION}},
  number       = {{8/2023}},
  pages        = {{56--59}},
  title        = {{{Recycling-Ansatz für mehrkomponentige Kunststoffprodukte durch thermische Verbundtrennung}}},
  year         = {{2023}},
}

@inproceedings{52840,
  author       = {{Schöppner, Volker and Arndt, Theresa}},
  booktitle    = {{76th Annual Assembly of the International Institute of Welding (IIW)}},
  title        = {{{Anvil-free ultrasonic welding for welding situations with one sided access}}},
  year         = {{2023}},
}

@article{52837,
  author       = {{Moritzer, Elmar and Kartelmeyer, S. and Kringe, R. and Jaroschek, C.}},
  journal      = {{Plastics Insights}},
  number       = {{8/2023}},
  pages        = {{44--48}},
  title        = {{{Conformal Cooling at Low Cost}}},
  year         = {{2023}},
}

@phdthesis{50449,
  abstract     = {{The importance of fiber-reinforced plastics for lightweight construction applications is steadily increasing due to their outstanding weight-specific property values. However, a decisive disadvantage of these composite materials has so far been the high material and process costs, which is why fiber-reinforced plastics are almost exclusively used in small to medium-sized series. Optimization of manufacturing methods is of great importance to reduce the production cost. In this study, two concepts are proposed that can optimize vacuum assisted light resin transfer molding (VA-LRTM) further, leading to a possibility of fully automatic process. Conventional VA-LRTM methods are used to produce complex fiber-reinforced plastics (FRP) and hybrid components. Traditional molds used to produce components via VA-LRTM are sealed using polymer materials to prevent the leakage of matrix system. The seals undergo tremendous amounts of thermal, chemical, and mechanical loadings. Thus, sealings must be replaced in short intervals. In the current study, a concept where sealing is achieved by accelerating the curing of matrix system itself with the help of heating elements and catalysts resulting in a self-sealing approach is proposed. Another concern is mold surface contamination during component production. To address this, a modified automatic cleaning technique based on ultrasonic cleaning was proposed which can be integrated into the production line with minimum modification. Both the proposed concepts were validated and optimized using experiments, simulations, and analytical approaches by producing metal-FRP hybrid shafts.}},
  author       = {{Chalicheemalapalli Jayasankar, Deviprasad}},
  keywords     = {{fiber-reinforced plastics, resin transfer molding, composites}},
  title        = {{{Advances In RTM Manufacturing Of Metal-FRP Hybrids By Self-Sealing And In-Mold Cleaning Techniques}}},
  year         = {{2023}},
}

@inproceedings{45831,
  author       = {{Chalicheemalapalli Jayasankar, Deviprasad and Stallmeister, Tim and Lückenkötter, Julian and Tröster, Thomas}},
  keywords     = {{Compression Molding, Glass Mat Thermoplastics, Hybrid Brake Pedal}},
  location     = {{Trondheim, Norway }},
  title        = {{{In-Mold Assembly of Hybrid GMT-Steel Brake Pedals by 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}},
}

@phdthesis{37640,
  author       = {{Kröker, Michael}},
  title        = {{{Experimentelle und modellbasierte Untersuchungen zum Prozessverhalten von teilkristallinen Materialien im Spritzgießsonderverfahren GITBlow}}},
  year         = {{2023}},
}

@article{42165,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Composite materials, such as fiber reinforced polymers, become increasingly important due to their excellent mechanical and lightweight properties. In this respect, this paper reports the characterization of a unidirectional carbon fiber reinforced polymer composite material. Particularly, the mechanical behavior of the overall composite and of the individual constituents of the composite is investigated. To this end, tensile and shear tests are performed for the composite. As a result, statistics for five transversely isotropic material parameters can be established for the composite. For the description of the mechanical properties of the constituents, tensile tests for the carbon fiber as well as for the polymer matrix are carried out. In addition, the volume fraction of fibers in the matrix is determined experimentally using an ashing technique and Archimedes’ principle. For the Young’s modulus of the fiber, the Young’s modulus and transverse contraction of the matrix, as well as the volume fraction of the constituents, statistics can be concluded. The resulting mechanical properties on both scales are useful for the application and validation of different material models and homogenization methods. Finally, in order to validate the obtained properties in the future, inhomogeneous tests were performed, once a flat plate with a hole and a flat plate with semicircular notches.</jats:p>}},
  author       = {{Penner, Eduard and Caylak, Ismail and Mahnken, Rolf}},
  issn         = {{1229-9197}},
  journal      = {{Fibers and Polymers}},
  keywords     = {{Polymers and Plastics, General Chemical Engineering, General Chemistry}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Experimental Investigations of Carbon Fiber Reinforced Polymer Composites and Their Constituents to Determine Their Elastic Material Properties and Complementary Inhomogeneous Experiments with Local Strain Considerations}}},
  doi          = {{10.1007/s12221-023-00122-x}},
  year         = {{2023}},
}

@article{43095,
  author       = {{Lenz, Peter and Mahnken, Rolf}},
  issn         = {{0263-8223}},
  journal      = {{Composite Structures}},
  keywords     = {{Civil and Structural Engineering, Ceramics and Composites}},
  publisher    = {{Elsevier BV}},
  title        = {{{Non-local integral-type damage combined to mean-field homogenization methods for composites and its parallel implementation}}},
  doi          = {{10.1016/j.compstruct.2023.116911}},
  year         = {{2023}},
}