@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}}, } @article{48749, author = {{Vogtschmidt, Sascha and Schöppner, Volker}}, journal = {{Joining Plastics}}, title = {{{Schweißnahtkennwerte für die lebensdaueroptimierte Bauteilauslegung von hochtemperaturbeständigen Thermoplasten}}}, year = {{2023}}, } @article{48753, author = {{Schöppner, Volker and Frank, Maximilian and Schall, Christoph Wilhelm Theodor}}, issn = {{2941-4202}}, journal = {{Plastic Insights}}, number = {{7/2023}}, pages = {{52--54}}, title = {{{The Wave Must Be Right}}}, year = {{2023}}, } @inproceedings{48755, author = {{Moritzer, Elmar and Held, Christian}}, location = {{Chemnitz (Deutschland)}}, title = {{{Vorspannkraftrelaxation bei der Direktverschraubung additiv gefertigter Kunststoffbauteile}}}, year = {{2023}}, } @article{48781, abstract = {{In a punch-bending machine, wire products are manufactured for a wide range of industrial sectors, such as the electronics industry. The raw material for this process is flat wire made of high-strength steel. During the manufacturing process of the flat wire, residual stresses and plastic deformations are induced into the wire. These residual stresses and deformations fluctuate over the length of the semi-finished product and have a negative effect on the final product quality. Straightening machines are used to reduce this influence to a minimum. So far, the adjustment of a straightening machine has been performed manually, which is a lengthy and complex task even for an experienced worker. This inevitably leads to the use of inefficient straightening strategies and causes high rejection rates in the entire production process. Due to a lack of sensor information from the straightening operation, application of modern feedback control methods has not been practicable. This paper presents a novel design for a straightening machine with an integrated, precise straightening force measurement. By simultaneously monitoring the position of the straightening rollers, state variables of the straightening operation can be derived. Additionally, a tension control for feeding the flat wire is introduced. This is implemented to mitigate the disturbing effects caused by irregularities in the wire-feeding process. In the results of this article, the high precision of the developed force measurement design and its possible applications are shown.}}, author = {{Bathelt, Lukas and Scurk, Maximilian and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}}, issn = {{1424-8220}}, journal = {{Sensors}}, number = {{22}}, title = {{{Novel Straightening-Machine Design with Integrated Force Measurement for Straightening of High-Strength Flat Wire}}}, doi = {{10.3390/s23229091}}, volume = {{23}}, year = {{2023}}, } @book{48804, abstract = {{Selbstverständlichkeiten in Verständlichkeiten überführen – dies ist das Credo der Phänomenologie Husserls. Ein zentrales Anliegen des phänomenologischen Programms ist es, die „vermeintlichen Selbstverständlichkeiten“ des Positivismus aufzudecken und zu klären; zugleich gibt Selbstverständlichkeit Anlass zu inhaltlichen Analysen, denn sie fungiert als Geltungsmodus des alltäglichen Lebensvollzugs, gespiegelt im Sinnbild von Boden und Horizont der Lebenswelt. Die Studie stellt Geltung, Einstellung und Perspektivwechsel als jene begrifflichen Werkzeuge heraus, mit denen Husserl dieses schwer greifbare Phänomen systematisch erschließt und methodisch wie inhaltlich in die Spannungsfelder von Theorie und Praxis, Doxa und Episteme, Lebenswelt und Wissenschaft einbettet. Darüber hinaus ergänzt sie mit dem psychopathologischen Ansatz Wolfgang Blankenburgs, was die Beschreibungsmacht der Phänomenologie an ihre Grenzen bringt: die Erfahrung der Selbstverständlichkeit im Lebensvollzug. }}, author = {{Philippi, Martina}}, isbn = {{978-3-8467-6726-9}}, keywords = {{Selbstverständlichkeit, Husserl, Phänomenologie}}, pages = {{220+XVI}}, publisher = {{Brill, Fink}}, title = {{{Selbstverständlichkeit und Problematisierung. Husserls Programm der Phänomenologie}}}, volume = {{40}}, year = {{2023}}, } @inproceedings{48095, abstract = {{Fused deposition modeling (FDM) is an additive manufacturing process that can be used to manufacture three-dimensional thermoplastic components layer by layer. One disadvantage of FDM is the shrinkage of the components during the manufacturing process. The filament is molten in the nozzle, deposited layer by layer, and cools down again. During solidification, the filament shrinks inhomogeneously in the x/y/z direction, which leads to distortion of the component geometries. Particularly with higher nominal lengths and complex local geometries, there is a need for optimization with regard to dimensional accuracy. The aim of this paper is to counteract this on the software side with global as well as local shrinkage factors. The expected shrinkage within a layer is predicted with an in-house developed software. The geometric accuracy of the model is verified by experimental investigations on cylindrical test specimens. In these, the so-called clover effect occurs as a result of the shrinkage. The circular shape of the deposited layer is deformed by the distortion in the x–y plane comparable to a clover. Finally, the results are validated by analyzing a demonstrator in the form of a bracket.}}, author = {{Koers, Thorsten and Magyar, Balázs}}, booktitle = {{Macromolecular Symposia}}, editor = {{Lamanna, Giuseppe and Opran, Constantin}}, location = {{Bucharest, Romania}}, number = {{1}}, publisher = {{Wiley}}, title = {{{Compensation of the Shrinkage Behavior Occurring in Cylindrical Components in the FDM Process}}}, doi = {{https://doi.org/10.1002/masy.202200185}}, volume = {{411}}, year = {{2023}}, } @phdthesis{49155, abstract = {{Hybride Bauteile, welche aus Werkstoffen mit hohen spezifischen Festigkeiten bestehen, können zu einem signifikanten Leichtbau im Automobil beitragen. Diese Arbeit erforscht die hybride Kombination von pressgehärtetem Stahl und kohlenstofffaserverstärktem Kunststoff. Ausgehend von einer Analyse bestehender Karosseriestrukturen erfolgt ein Konzept für eine hybride B-Säule. Das Potential zur Gewichtsreduzierung durch das hybride Bauteilkonzept wurde dabei zu 57 % identifiziert, welches jedoch nur bei Sicherstellung einer intakten Grenzfläche erreicht wird. Zur Erlangung der Grenzflächenfestigkeit bei charakteristischen Belastungsprofilen wurde ein Verfahren zur Einbringung makroskopischer Formschlusselemente im Presshärteprozess entwickelt. Durch diese Formschlusselemente wird eine Steigerung der Scherfestigkeit der hybriden Komponenten von über 300 % erreicht. Die gewonnenen Erkenntnisse werden abschließend zur Auslegung einer hybriden B-Säule angewendet.}}, author = {{Triebus, Marcel}}, title = {{{Belastungsgerechte Auslegung automobiler Leichtbaustrukturen aus pressgehärtetem Stahl und kohlenstofffaserverstärktem Kunststoff}}}, doi = {{10.17619/UNIPB/1-1719}}, year = {{2023}}, } @book{49299, author = {{Herdramm, Henrike}}, isbn = {{ 978-3-534-30012-9}}, pages = {{86}}, publisher = {{wbg academic}}, title = {{{Die Fremdheit der Tiere. Zur theologischen Konstruktion und Dekonstruktion des Anderen}}}, volume = {{3}}, year = {{2023}}, } @phdthesis{48072, abstract = {{Die weltweit erzeugten Emissionen müssen in allen emittierenden Sektoren signifikant gesenkt werden, um die Auswirkungen des Klimawandels zu reduzieren. Dies ist unter anderem durch die energieeffiziente Wiederverwertung vorhandener Ressourcen und damit der Einstellung einer nachhaltigen Kreislaufwirtschaft möglich. Aufgrund der hohen erforderlichen Energiemenge in der primären Herstellung von Aluminium existieren hier im Vergleich zu anderen Konstruktionswerkstoffen große Einsparpotentiale. Mit dem in dieser Arbeit erforschten reibungsinduzierten Recyclingverfahren (RIR) wird eine alternative und energieeffiziente Prozessroute zum direkten Recycling von unterschiedlichen Aluminiumschrotten geschaffen. Zur Charakterisierung der Prozessroute werden u. a. die Erkenntnisse aus sich gegenseitig unterstützenden experimentellen und theoretischen Untersuchungen zu den Vorgängen der der Verdichtung, Plastifizierung als auch Extrusion der recycelten Profile dargelegt. Die Einflüsse unterschiedlicher Eingangsgrößen wie z. B. der Werkzeuggestaltung oder der Verarbeitung unterschiedlicher Legierungen werden zudem zur zukünftigen Auslegung des Prozesses erläutert. Aus der abschließenden energetischen Bilanzierung kann geschlossen werden, dass aufgrund der geringeren Verarbeitungstemperatur signifikante Energieersparnisse bei Verwendung des RIR im Vergleich zu den konventionellen Produktionsstrategien erzielt werden können.}}, author = {{Borgert, Thomas}}, isbn = {{978-3-8440-9240-0}}, pages = {{200}}, title = {{{Reibungsinduzierter Prozess zum nutzerindividuellen und energieeffizienten Recycling von Aluminiumschrotten}}}, year = {{2023}}, } @article{48374, abstract = {{Abstract Purpose Protein-rich foods show heterogeneous associations with the risk of type 2 diabetes (T2D) and it remains unclear whether habitual protein intake is related to T2D risk. We carried out an umbrella review of systematic reviews (SR) of randomised trials and/or cohort studies on protein intake in relation to risks of T2D. Methods Following a pre-specified protocol (PROSPERO: CRD42018082395), we retrieved SRs on protein intake and T2D risk published between July 1st 2009 and May 22nd 2022, and assessed the methodological quality and outcome-specific certainty of the evidence using a modified version of AMSTAR 2 and NutriGrade, respectively. The overall certainty of evidence was rated according to predefined criteria. Results Eight SRs were identified of which six contained meta-analyses. The majority of SRs on total protein intake had moderate or high methodological quality and moderate outcome-specific certainty of evidence according to NutriGrade, however, the latter was low for the majority of SRs on animal and plant protein. Six of the eight SRs reported risk increases with both total and animal protein. According to one SR, total protein intake in studies was ~ 21 energy percentage (%E) in the highest intake category and 15%E in the lowest intake category. Relative Risks comparing high versus low intake in most recent SRs ranged from 1.09 (two SRs, 95% CIs 1.02–1.15 and 1.06–1.13) to 1.11 (1.05–1.16) for total protein (between 8 and 12 cohort studies included) and from 1.13 (1.08–1.19) to 1.19 (two SRs, 1.11–1.28 and 1.11–1.28) (8–9 cohort studies) for animal protein. However, SRs on RCTs examining major glycaemic traits (HbA1c, fasting glucose, fasting insulin) do not support a clear biological link with T2D risk. For plant protein, some recent SRs pointed towards risk decreases and non-linear associations, however, the majority did not support an association with T2D risk. Conclusion Higher total protein intake was possibly associated with higher T2D risk, while there is insufficient evidence for a risk increase with higher intakes of animal protein and a risk decrease with plant protein intake. Given that most SRs on plant protein did not indicate an association, there is possibly a lack of an effect. }}, author = {{Schulze, Matthias B. and Haardt, Julia and Amini, Anna M. and Kalotai, Nicole and Lehmann, Andreas and Schmidt, Annemarie and Buyken, Anette and Egert, Sarah and Ellinger, Sabine and Kroke, Anja and Kühn, Tilman and Louis, Sandrine and Nimptsch, Katharina and Schwingshackl, Lukas and Siener, Roswitha and Zittermann, Armin and Watzl, Bernhard and Lorkowski, Stefan}}, issn = {{1436-6207}}, journal = {{European Journal of Nutrition}}, keywords = {{Nutrition and Dietetics, Medicine (miscellaneous)}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Protein intake and type 2 diabetes mellitus: an umbrella review of systematic reviews for the evidence-based guideline for protein intake of the German Nutrition Society}}}, doi = {{10.1007/s00394-023-03234-5}}, year = {{2023}}, } @misc{48433, author = {{Böttger, Lydia}}, booktitle = {{www.daz-portal.de}}, title = {{{Lydia Böttger (Universität Paderborn) rezensiert: Burwitz-Melzer, Eva; Riemer, Claudia; Schmelter, Lars (Hrsg.) (2022): Feedback beim Lehren und Lernen von Fremd- und Zweitsprachen. Arbeitspapiere der 42. Frühjahrs- konferenz zur Erforschung des Fremdsprachenunterrichts. [Giessener Beiträge zur Fremdsprachendidaktik]. Tübingen: Narr Francke Attempto, 245 Seiten. ISBN 978-3- 8233-8569-1}}}, year = {{2023}}, } @article{48456, abstract = {{Abstract Purpose Our aim was to assess alignment in timing of ‘highest caloric intake’ with individual chronotype and its association with body composition in adolescents. Methods We used repeatedly collected data from n = 196 adolescents (age 9–16 years, providing N = 401 yearly questionnaires) of the DONALD open cohort study. Chronotype was assessed by the Munich Chronotype Questionnaire from which midpoint of sleep (MSFsc) was derived. A sex- and age-specific diet-chrono-alignment score (DCAS) was calculated as the difference in hours between the chronotype-specific median timing of highest caloric intake of the studied population and the individual timing of ‘highest caloric intake’ or vice versa. Repeated-measures regression models were applied to study cross-sectional and longitudinal associations between the DCAS and body composition, e.g., Fat Mass Index (FMI) or Fat Free Mass Index (FFMI). Results DCAS ranged from −6:42 h to + 8:01 h and was not associated with body composition. Among adolescents with a later chronotype (N = 201) a 1 h increase in DCAS (later consumption of ‘highest caloric intake’ in comparison to the median intake of that group), increased FFMI by 1.92 kg/m2 (95% CI: 0.15, 3.69, p value = 0.04) over a median follow-up of 0.94 year. Conclusion Alignment of energy intake with individual chronotype appears beneficial for FFMI among those with a late chronotype. }}, author = {{Jankovic, Nicole and Schmitting, Sarah and Stutz, Bianca and Krüger, Bettina and Buyken, Anette and Alexy, Ute}}, issn = {{1436-6207}}, journal = {{European Journal of Nutrition}}, keywords = {{Nutrition and Dietetics, Medicine (miscellaneous)}}, publisher = {{Springer Science and Business Media LLC}}, title = {{{Alignment between timing of ‘highest caloric intake’ and chronotype in relation to body composition during adolescence: the DONALD Study}}}, doi = {{10.1007/s00394-023-03259-w}}, year = {{2023}}, } @inproceedings{48570, author = {{Lenz, Cederic and Henke, Christian and Trächtler, Ansgar}}, booktitle = {{2023 IEEE 21st International Conference on Industrial Informatics (INDIN)}}, publisher = {{IEEE}}, title = {{{A Methodical Approach to Hybrid Modelling for Contextual Anomaly Detection on Time-Series Data}}}, doi = {{10.1109/indin51400.2023.10218108}}, year = {{2023}}, } @inproceedings{48572, abstract = {{Abstract. To increase the sustainability of forming processes such as punch bending, homogenization of the processed semi-finished product is an essential step in the manufacturing process. High-strength wire materials are usually available as strip material before being further processed in a forming process. For storage and transport, the material is coiled onto coils and transported to the customer. During the coiling process, residual stresses and plastic deformation are introduced into the wire. Thus, the final product quality is also influenced by the geometry of the coil. Straightening machines are used in production lines to compensate for these. Once a straightening machine has been set up, the settings for the roll positions are usually not changed. As a result, there is no reaction to material fluctuations, which means that the components to be produced do not meet the dimensional accuracy requirements. This leads to an increase in the rejection rate in manufacturing processes. To reduce the rejection rate, it is necessary to enable dynamic and flexible infeed of the straightening rollers. In this context, an innovative control concept with disturbance compensation was developed for the straightening process. The disturbance compensation uses a disturbance model that predicts the change in bending curvature over the coil radius. With this prediction, the straightening machine can be adjusted specifically. The roller positions are adjusted by a subordinate position control. The additional feedback from measured geometric product properties from the following punching-bending process enables the straightening machine to be adjusted even in the case of unforeseen fluctuations in the material properties. In this way, it is possible to react to any material fluctuations as required. This novel, demand-oriented adjustment of the straightening machine is expected to result in a high increase in the efficiency of the production process and a reduction of the rejection rate. }}, author = {{Bathelt, Lukas and Djakow, Eugen and Henke, Christian and Trächtler, Ansgar}}, booktitle = {{Materials Research Proceedings}}, issn = {{2474-395X}}, publisher = {{Materials Research Forum LLC}}, title = {{{Innovative self-learning disturbance compensation for straightening processes}}}, doi = {{10.21741/9781644902479-216}}, year = {{2023}}, } @inproceedings{48001, author = {{Bathelt, Lukas and Djakow, Eugen and Dahms, Frederik and Henke, Christian and Trächtler, Ansgar and Homberg, Werner}}, booktitle = {{Ilmenauer Federntag 2023: Neueste Erkenntnisse zu Funktion, Berechnung, Prüfung und Gestaltung von Federn und Werkstoffen}}, isbn = {{978-3-948595-09-8}}, location = {{Ilmenau}}, publisher = {{ISLE Steuerungstechnik und Leistungselektronik}}, title = {{{Neuartiger Ansatz zum Richten von zwei- und dreidimensionalen Fehlern an einem Federdraht}}}, year = {{2023}}, }