@phdthesis{42069,
  author       = {{Lankeit, Christopher}},
  title        = {{{Systematik zur Evolution technischer Anforderungen}}},
  year         = {{2021}},
}

@phdthesis{28370,
  author       = {{Kohlstedt, Andreas}},
  isbn         = {{978-3-947647-15-6}},
  publisher    = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}},
  title        = {{{Modellbasierte Synthese einer hybriden Kraft-/Positionsregelung für einen Fahrzeugachsprüfstand mit hydraulischem Hexapod}}},
  volume       = {{396}},
  year         = {{2021}},
}

@phdthesis{42529,
  author       = {{Keck, Stefan}},
  isbn         = {{978-3-18-335418-4}},
  issn         = {{0178-9457}},
  pages        = {{124}},
  title        = {{{Rissverhalten von unidirektionalen Flachsfaser-Epoxidharz-Verbunden infolge statischer Belastung}}},
  volume       = {{354}},
  year         = {{2021}},
}

@phdthesis{42759,
  author       = {{Laubrock, Miriam}},
  isbn         = {{978-3-8440-7823-7}},
  title        = {{{Auslegung lastübertragender Klebverbindungen für den Landmaschinenbau}}},
  year         = {{2021}},
}

@phdthesis{42760,
  author       = {{Giese, Patrick}},
  isbn         = {{978-3-8440-8113-8}},
  title        = {{{Methode zur Prognose des Tragverhaltens von Halbhohlstanznietverbindungen}}},
  year         = {{2021}},
}

@phdthesis{42761,
  author       = {{Janzen, Vitalij}},
  isbn         = {{978-3-8440-8346-0}},
  title        = {{{Weiterentwicklung des einstufigen Widerstandselementschweißens}}},
  year         = {{2021}},
}

@phdthesis{42764,
  author       = {{Sartisson, Vadim}},
  isbn         = {{978-3-8440-8228-9}},
  title        = {{{Entwicklung eines selbstschließenden Vollstanznietverfahrens für das Fügen ultrahochfester Stahlwerkstoffe mit Aluminiumlegierungen}}},
  year         = {{2021}},
}

@phdthesis{42765,
  author       = {{Zweck, Jonas}},
  isbn         = {{978-3-8440-8304-0}},
  title        = {{{Robotergeführtes Fließlochformschrauben hochfester Stahlwerkstoffe mit Aluminium-Strangpressprofilen}}},
  year         = {{2021}},
}

@phdthesis{42811,
  author       = {{Janzen, Alexander}},
  isbn         = {{978-3-8439-4847-0}},
  title        = {{{Analyse von elektrischen Wärmeübertragungselementen unter Berücksichtigung des Kristallisationsfoulings in der Warmwasseraufbereitung }}},
  year         = {{2021}},
}

@article{34227,
  abstract     = {{In order to reduce the fuel consumption and consequently the greenhouse emissions, the automotive industry is implementing lightweight constructions in the body in white production. As a result, the use of aluminum alloys is continuously increasing. Due to poor weldability of aluminum in combination with other materials, mechanical joining technologies like clinching are increasingly used. In order to predict relevant characteristics of clinched joints and to ensure the reliability of the process, it is simulated numerically during product development processes. In this regard the predictive accuracy of the simulated process highly depends on the implemented friction model. In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly. This paper presents a testing method, which enables to determine the frictional coefficients between sheet metal materials for the simulation of clinching processes. For this purpose, the correlation of interface pressure and the relative velocity between aluminum sheets in clinching processes is investigated using numerical simulation. Furthermore, the developed testing method focuses on the specimen geometry as well as the reproduction of the occurring friction conditions between two sheet metal materials in clinching processes. Based on a methodical approach the test setup is explained and the functionality of the method is proven by experimental tests using sheet metal material EN AW6014.}},
  author       = {{Rossel, Moritz Sebastian and Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}},
  issn         = {{1662-9795}},
  journal      = {{Key Engineering Materials}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  pages        = {{81--88}},
  publisher    = {{Trans Tech Publications, Ltd.}},
  title        = {{{Development of a Method for the Identification of Friction Coefficients in Sheet Metal Materials for the Numerical Simulation of Clinching Processes}}},
  doi          = {{10.4028/www.scientific.net/kem.883.81}},
  volume       = {{883}},
  year         = {{2021}},
}

@inproceedings{27553,
  author       = {{Ludwig, Janis and Schmid, Hans-Joachim}},
  title        = {{{Synthese und asymmetrische Funktionalisierung von submikronen Janus-Polymer-Partikeln in der Gasphase (Poster)}}},
  year         = {{2021}},
}

@article{43159,
  author       = {{Damm, Jannis and Albiez, Matthias and Göddecke, Johannes and Meschut, Gerson and Ummenhofer, Thomas}},
  issn         = {{1619-1919}},
  journal      = {{adhäsion KLEBEN & DICHTEN}},
  keywords     = {{Polymers and Plastics, General Chemical Engineering, General Chemistry}},
  number       = {{9}},
  pages        = {{14--23}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Dämpfungseigenschaften geklebter Verbindungen - Potenzialanalyse und Klebstoffcharakterisierung}}},
  doi          = {{10.1007/s35145-021-0520-8}},
  volume       = {{65}},
  year         = {{2021}},
}

@article{21635,
  abstract     = {{<jats:p>Modern forming processes often allow today the efficient production of complex parts. In order to increase the sustainability of forming processes it would be favorable if the forming of workpieces becomes possible using production waste. At the Chair of Forming and Machining Technology of the Paderborn University (LUF) research is presently conducted with the overall goal to produce workpieces directly from secondary aluminum (e.g., powder and chips). Therefore, friction-based forming processes like friction spinning (or cognate processes) are used due to their high efficiency. As a pre-step, the production of semi-finished parts was the subject of accorded research work at the LUF. Therefore, a friction-based hot extrusion process was used for the full recycling or rework of aluminum chips into profiles. Investigations of the recycled semi-finished products show that they are comparable to conventionally produced semi-finished products in terms of dimensional stability and shape accuracy. An analysis of the mechanical properties of hardness and tensile strength shows that a final product with good and homogeneously distributed properties can be produced. Furthermore, significant correlations to the friction spinning process could be found that are useful for the above-mentioned direct part production from secondary aluminum.</jats:p>}},
  author       = {{Borgert, Thomas and Homberg, Werner}},
  issn         = {{2075-4701}},
  journal      = {{Metals}},
  title        = {{{Friction-Induced Recycling Process for User-Specific Semi-Finished Product Production}}},
  doi          = {{10.3390/met11040663}},
  year         = {{2021}},
}

@inproceedings{23746,
  author       = {{Moritzer, Elmar and Flachmann, Felix}},
  booktitle    = {{SPE ANTEC 2021: The Annual Technical Conference for Plastic Professionals}},
  isbn         = {{978-1-7138-3075-7}},
  location     = {{Online}},
  pages        = {{536--540}},
  title        = {{{Influence of Chemical Blowing Agents on the Filling Behavior of Wood-Plastic-Composite Melts}}},
  year         = {{2021}},
}

@article{23789,
  author       = {{Bolenz, Lukas and Ehlert, Thomas and Dechert, Christopher and Bertling, René and Kenig, Eugeny}},
  issn         = {{0263-8762}},
  journal      = {{Chemical Engineering Research and Design}},
  pages        = {{99--108}},
  title        = {{{Modelling of a continuous distillation process with finite reflux ratio using the hydrodynamic analogy approach}}},
  doi          = {{10.1016/j.cherd.2021.05.025}},
  year         = {{2021}},
}

@inproceedings{34222,
  abstract     = {{Driven by the CO2-emission law by the European government and the increasing costs for raw materials as well as energy, the automotive industry is increasingly using multi-material constructions. This leads to a continuous increase in the use of mechanical joining techniques and especially the self-piercing riveting is of particular importance. The reason for this is the wide range of joining possibilities as well as the high load-bearing capacities of the joints. To be able to react to changing boundary conditions, like material thickness or strength variation of the sheets, research work is crucial with regard to the increase of versatility. In this paper, a numerical study of the influences on the selfpiercing riveting process is presented. For this purpose, the influence of different process parameters such as rivet length and die depth on various quality-relevant characteristics were investigated. With the help of the design of experiment, significant influences were determined and interactions between the individual parameters are shown.}},
  author       = {{Kappe, Fabian and Bielak, Christian Roman and Sartisson, Vadim and Bobbert, Mathias and Meschut, Gerson}},
  booktitle    = {{ESAFORM 2021}},
  publisher    = {{University of Liege}},
  title        = {{{Influence of rivet length on joint formation on self-piercing riveting process considering further process parameters}}},
  doi          = {{10.25518/esaform21.4277}},
  year         = {{2021}},
}

@inproceedings{30675,
  abstract     = {{<jats:p>In many areas of product manufacturing constructions consist of individual components and metal sheets that are joined together to form complex structures. A simple and industrial common method for joining dissimilar and coated materials is clinching. During the joining process and due to the service load cracks can occur in the area of the joint, propagate due to cyclic loading and consequently lead to structural failure. For the prevention of these damage cases, first of all knowledge about the fracture mechanical material parameters regarding the original material state of the sheet metals used within the clinching process are essential.Within the scope of this paper experimental and numerical preliminary investigations regarding the fracture mechanical behavior of sheet metals used within the clinching process are presented. Due to the low thickness of 1.5 mm of the material sheets, the development of a new specimen is necessary to determine the crack growth rate curve including the fracture mechanical parameters like the threshold against crack growth ΔK<jats:sub>I,th</jats:sub> and the fracture toughness K<jats:sub>IC</jats:sub> of the base material HCT590X. For the experimental determination of the crack growth rate curve the numerical calculation of the geometry factor function as well as the calibration function of this special specimen are essential. After the experimental validation of the numerically determined calibration function, crack growth rate curves are determined for the stress ratios <jats:italic>R</jats:italic> = 0.1 and <jats:italic>R</jats:italic> = 0.3 to examine the mean stress sensitivity. In addition, the different rolling directions of 0° and 90° in relation to the initial crack are taken into account in order to investigate the influence of the anisotropy due to rolling.</jats:p>}},
  author       = {{Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  booktitle    = {{Key Engineering Materials}},
  issn         = {{1662-9795}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  location     = {{online}},
  pages        = {{127--132}},
  publisher    = {{Trans Tech Publications, Ltd.}},
  title        = {{{Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X}}},
  doi          = {{10.4028/www.scientific.net/kem.883.127}},
  volume       = {{883}},
  year         = {{2021}},
}

@article{30674,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>In addition to the classical strength calculation, it is important to design components with regard to fracture mechanics because defects and cracks in a component can drastically influence its strength or fatigue behavior. Cracks can propagate due to operational loads and consequently lead to component failure. The fracture mechanical analysis provides information on stable or unstable crack growth as well as about the direction and the growth rate of a crack. For this purpose, sufficient information has to be available about the crack location, the crack length, the component geometry, the component loading and the fracture mechanical material parameters. The fracture mechanical properties are determined experimentally with standardized specimens as defined by the guidelines of the American Society for Testing and Materials. In practice, however, especially in the context with damage cases or formed material fracture mechanical parameters directly for a component are of interest. However, standard specimens often cannot be extracted at all due to the complexity of the component geometry. Therefore, the development of special specimens is required whereby certain arrangements have to be made in advance. These arrangements are presented in the present paper in order to contribute to a holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens.</jats:p>}},
  author       = {{Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  issn         = {{0944-6524}},
  journal      = {{Production Engineering}},
  keywords     = {{Industrial and Manufacturing Engineering, Mechanical Engineering}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens}}},
  doi          = {{10.1007/s11740-021-01096-6}},
  year         = {{2021}},
}

@phdthesis{42812,
  author       = {{Olenberg, Alexander}},
  isbn         = {{9783843947855}},
  title        = {{{Untersuchung und Optimierung von strukturierten Packungen mittels CFD-Simulationen }}},
  year         = {{2021}},
}

@article{25896,
  abstract     = {{In this report, a flame spray pyrolysis setup has been examined with various in situ extraction methods of particle samples along the flame axis. First, two precursor formulations leading to the formation of iron oxide nanoparticles were used in a standardized SpraySyn burner system, and the final particle outcome was characterized by a broad range of established powder characterization techniques (TEM/HRTEM, SAXS, XRD, BET). The characterization of the powder products evidenced that mostly homogeneous gas-to-particle conversion takes place when applying an acidic precursor solution, whereas the absence of the acid leads to a dominant droplet-to-particle pathway. Our study indicates that a droplet-to-particle-pathway could be present even when processing the acidic formulation. However, even if a secondary pathway might take place in this case as well, it is not dominant and nearly negligible. Subsequently, the in situ particle structure evolution was investigated for the dominant gas-to-particle pathway, and particles were extracted along the flame axis for online SMPS and offline TEM/HRTEM analysis. Due to the highly reactive conditions within the flame (high temperatures, turbulent flow field, high particle number concentrations), the extraction of representative samples from spray flames is challenging. In order to handle the reactive conditions, two extraction techniques were tailored in this report. To extract an aerosol sample within the flame for SMPS measurement, a Hole in a Tube probe was adjusted. Thus, the mobility particle diameter as well as the corresponding distribution widths were obtained at different heights above the burner along the flame axis. For TEM/HRTEM image analysis, particle samples were collected thermophoretically by means of a tailored shutter system. Since all sampling grids were protected until reaching the flame axis and due to the low sampling time, momentary captures of local particle structures could be extracted precisely. The particle morphologies have clearly shown an evolution from spherical and paired particles in the flame center to fractal and compact agglomerates at later synthesis stages.}},
  author       = {{Tischendorf, R. and Simmler, M. and Weinberger, Christian and Bieber, M. and Reddemann, M. and Fröde, F. and Lindner, J. and Pitsch, H. and Kneer, R. and Tiemann, Michael and Nirschl, H. and Schmid, H.-J.}},
  issn         = {{0021-8502}},
  journal      = {{Journal of Aerosol Science}},
  title        = {{{Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques}}},
  doi          = {{10.1016/j.jaerosci.2020.105722}},
  year         = {{2021}},
}