2022
Möllers, Hendrik; Schmidt, Carsten; Meiners, Dieter
Spray binder for automated preforming: Spray process and preform properties Artikel
In: Polymer Composites, Bd. 1, 2022.
Abstract | Links | BibTeX | Schlagwörter: Binder, Continuous Wet Draping
@article{Möllers2022,
title = {Spray binder for automated preforming: Spray process and preform properties},
author = {Hendrik Möllers and Carsten Schmidt and Dieter Meiners},
doi = {https://doi.org/10.1002/pc.27107},
year = {2022},
date = {2022-10-20},
urldate = {2022-10-20},
journal = {Polymer Composites},
volume = {1},
abstract = {A closer look was taken at a spray binder and the properties of the preforms made with said binder and non-crimp carbon fiber textiles. First the spray process was analyzed, then T-peel and three point flexural tests were carried out to compare the spray binder to other binder systems. While the spray binder showed higher peel strength than most binders found in literature, the measured flexural strength was lower than the values found for powder.},
keywords = {Binder, Continuous Wet Draping},
pubstate = {published},
tppubtype = {article}
}
2021
Denkena, Berend; Schmidt, Carsten; Werner, Simon; Schwittay, Dietmar
In: Journal of Composites Science, Bd. 5(4), S. 93, 2021.
Abstract | Links | BibTeX | Schlagwörter: Continuous Wet Draping, Draping Simulation
@article{Denkena2021b,
title = {Development of a Shape Replicating Draping Unit for Continuous Layup of Unidirectional Non-Crimp Fabrics on Complex Surface Geometries},
author = {Berend Denkena and Carsten Schmidt and Simon Werner and Dietmar Schwittay},
doi = {https://doi.org/10.3390/jcs5040093},
year = {2021},
date = {2021-04-01},
journal = {Journal of Composites Science},
volume = {5(4)},
pages = {93},
abstract = {The manufacturing of large-scale structural components is still dominated by manual labor in many sectors of the modern composite industry. Efforts are being made to establish an automated layup technology for complex structural elements. Processing dry non-crimp fiber fabrics (NCF) offers great cost opportunities and high deposition rates, compared to prepreg-based technologies like automated fiber placement (AFP). Here, the fabric architecture is considered during the draping of the plane textile on curved surfaces. In this paper, the development of a draping unit for balancing fabric tension and consolidating continuously across the layup width is presented. We introduce a geometrical process model to achieve a fabric-friendly draping of the used unidirectional NCF. The shape of the resulting draping front depends on the surface geometry, the shearing of the previously laid-up textile, and the positioning of the material feed. To consolidate the fabric at the altering draping front in an automated layup process, the shape of the continuous consolidation element can be controlled by the elongation of serial soft actuators, manipulated by parallel robot kinematics. The shape replication ability of the draping unit is promising for the implementation of a continuous, fabric-friendly draping process for complex surface geometries.},
keywords = {Continuous Wet Draping, Draping Simulation},
pubstate = {published},
tppubtype = {article}
}
2019
Schmidt, Carsten; Fix, Johann; Timmermann, Marc; Werner, Simon
Flexible Produktion individualisierter CFK-Strukturen Artikel
In: lightweight.design, Bd. 12, Nr. 6, S. 58-63, 2019, ISSN: 2192-8738.
Abstract | BibTeX | Schlagwörter: Continuous Wet Draping, Draping Simulation, Light Weight Construction
@article{Schmidt2019c,
title = {Flexible Produktion individualisierter CFK-Strukturen},
author = {Carsten Schmidt and Johann Fix and Marc Timmermann and Simon Werner},
issn = {2192-8738},
year = {2019},
date = {2019-12-19},
journal = {lightweight.design},
volume = {12},
number = {6},
pages = {58-63},
abstract = {Das Forschungsprojekt FlexProCFK adressiert die anlagen- und materialtechnischen Herausforderungen, die bei der Herstellung komplexer CFK-Strukturen entstehen. Aus der Vision, bionische Strukturen im Flugzeugbau zu etablieren, ist eine Legetechnologie entstanden, die die bisherige Bandbreite automatisiert herstellbarer Bauteile signifikant erweitert.},
keywords = {Continuous Wet Draping, Draping Simulation, Light Weight Construction},
pubstate = {published},
tppubtype = {article}
}
Budelmann, Dennis; Reichert, Lisa; Schmidt, Carsten; Meiners, Dieter
Design und Herstellung unkonventionell versteifter Flugzeugstrukturen Artikel
In: Sonderprojekte ATZ/MTZ, Bd. 24, Nr. 2, S. 46-48, 2019, ISSN: 2509-4610.
Abstract | Links | BibTeX | Schlagwörter: Continuous Wet Draping, Design Optimization, Light Weight Construction
@article{Budelmann2019b,
title = {Design und Herstellung unkonventionell versteifter Flugzeugstrukturen},
author = {Dennis Budelmann and Lisa Reichert and Carsten Schmidt and Dieter Meiners},
doi = {10.1007/s41491-019-0045-8},
issn = { 2509-4610},
year = {2019},
date = {2019-12-18},
journal = {Sonderprojekte ATZ/MTZ},
volume = {24},
number = {2},
pages = {46-48},
abstract = {Am gemeinsamen Forschungsstandort in Stade entwickeln die TU Clausthal, die TU Braunschweig und die Leibniz Universität Hannover eine Fertigungstechnologie zur Herstellung komplex gekrümmter Faserverbundbauteile. Als individuelle Versteifungsstrukturen im Flugzeugrumpf ermöglichen diese Bauteile die notwendige Gewichtsreduktion im Flugzeugbau.},
keywords = {Continuous Wet Draping, Design Optimization, Light Weight Construction},
pubstate = {published},
tppubtype = {article}
}
Meiners, Dieter; Budelmann, Dennis
Materialcharakterisierung von Prepregs für automatisierte Legeprozesse Artikel
In: Jahresmagazin Kunststofftechnik, 2019, ISSN: 1619-8357.
Abstract | Links | BibTeX | Schlagwörter: Continuous Wet Draping, Rheometer, Tack
@article{Meiners2019,
title = {Materialcharakterisierung von Prepregs für automatisierte Legeprozesse},
author = {Dieter Meiners and Dennis Budelmann },
editor = {Institut für Wissenschaftliche Veröffentlichungen IWV},
url = {http://institut-wv.de/jahresmagazin-ingenieurwissenschaften-im-fokus-kunststofftechnik/},
issn = {1619-8357},
year = {2019},
date = {2019-10-17},
journal = {Jahresmagazin Kunststofftechnik},
abstract = {Die Herstellung von großflächigen, faserverstärkten Hochleistungsbauteilen für die Luft- und
Raumfahrt erfolgt durch automatisiertes Ablegen von Kohlenstofffaser-Prepregs. Der aus Sicht
des verarbeiteten Materials wichtigste Parameter für den Herstellungsprozess ist seine Klebrigkeit (Tack). Um die Robustheit der automatisierten Prozesse zu erhöhen, fehlt es sowohl an Kenntnis der komplexen Wechselwirkungen zwischen Halbzeugeigenschaften und Prozess als auch einer standardisierten Messmethode zur Quantifizierung des Prepreg-Tacks. Das Institut für Polymerwerkstoffe und Kunststofftechnik der TU Clausthal nimmt sich dieser Herausforderung an.},
keywords = {Continuous Wet Draping, Rheometer, Tack},
pubstate = {published},
tppubtype = {article}
}
Raumfahrt erfolgt durch automatisiertes Ablegen von Kohlenstofffaser-Prepregs. Der aus Sicht
des verarbeiteten Materials wichtigste Parameter für den Herstellungsprozess ist seine Klebrigkeit (Tack). Um die Robustheit der automatisierten Prozesse zu erhöhen, fehlt es sowohl an Kenntnis der komplexen Wechselwirkungen zwischen Halbzeugeigenschaften und Prozess als auch einer standardisierten Messmethode zur Quantifizierung des Prepreg-Tacks. Das Institut für Polymerwerkstoffe und Kunststofftechnik der TU Clausthal nimmt sich dieser Herausforderung an.
2018
Denkena, Berend; Schmidt, Carsten; Werner, Simon
Continuous Draping of Double Curved Geometries – A Geometrical Approach to Describe an Automated Layup Process of Fabrics on Complex Surface Konferenz
Southampton, Vereinigtes Königreich, 2018.
Abstract | BibTeX | Schlagwörter: Continuous Wet Draping
@conference{Denkena2018,
title = {Continuous Draping of Double Curved Geometries – A Geometrical Approach to Describe an Automated Layup Process of Fabrics on Complex Surface},
author = {Berend Denkena and Carsten Schmidt and Simon Werner},
editor = {SAMPE Europe Conference 2018 Southampton},
year = {2018},
date = {2018-09-12},
pages = {8},
address = {Southampton, Vereinigtes Königreich},
abstract = {To achieve a higher grade of integral aircraft structure design, a new unconventionally stiffened lattice composite fuselage panel is developed allowing a co-curing process of fuselage skin and stiffening structure. For this purpose, a novel automated layup module is under development. Within this contribution, the geometrical behaviour of the fibre-fabric during continuous draping onto the mould surface is investigated. Based on experimental draping studies on occurring issues during fabric draping, a process model was created. The presented approach is based on geometrical boundary conditions and neglects specific material properties. To ensure proper draping results, the fabric has to be kept under tension. Thus, it must be dropped in dependence of the surface geometry at the resulting “draping-spline” (Figure 4). Simulation results are verified and discussed through three-dimensional measuring data of the layup process. Subsequently, the geometrical data of the “draping-spline” for different process situations is analysed to determine the workspace for the layup modules shape-replicating kinematics. Furthermore, possible kinematical configurations and needed degrees of freedom to replicate the shape-changing three-dimensional spline mechanically are discussed.},
keywords = {Continuous Wet Draping},
pubstate = {published},
tppubtype = {conference}
}