2018
Völtzer, Klaas
Online-Prozessüberwachung von Automated Fiber Placement Prozessen auf Basis der Thermografie Buch
2018.
Abstract | BibTeX | Schlagwörter: Automated Fiber Placement, Process Monitoring
@book{Völtzer2018,
title = {Online-Prozessüberwachung von Automated Fiber Placement Prozessen auf Basis der Thermografie},
author = {Klaas Völtzer},
year = {2018},
date = {2018-06-08},
series = {Dissertation Leibniz Universität Hannover, Institut für Fertigungstechnik und Werkzeugmaschinen},
abstract = {Der steigende Einsatz von kohlenstofffaserverstärkten Kunststoffen (CFK), vor allem in der Luftfahrtindustrie, führt zu einer zunehmenden Bedeutung der CFK-Fertigungsverfahren, wie dem Automated Fiber Placement Prozess (AFP). Eine manuelle Überwachung dieses Prozesses ist aufgrund des geringen Kontrasts zwischen den einzelnen Laminatlagen erschwert und damit zeitintensiv und ineffizient. In dieser Arbeit wird eine neuartige Überwachungsmethode auf Basis der Thermografie vorgestellt und erforscht. Eine integrierte Infrarotkamera direkt hinter der Andruckeinheit des AFP-Legekopfes wertet dabei den Temperaturkontrast zwischen dem unmittelbar abgelegten Faser-Matrix-Halbzeug und dem Untergrund sowie die generelle Temperaturverteilung aus. Über eine Detektion der Halbzeugkanten können Positionierungsfehler identifiziert werden. Ebenso können über eine Auswertung der Oberflächentemperaturen Anbindungsfehler oder Fremdkörper anhand von Temperaturanomalien detektiert werden. Mit einem prototypischen Überwachungssystem werden die Systemgrenzen aufgezeigt und die Funktionsfähigkeit anhand eines Beispielprozesses demonstriert. },
keywords = {Automated Fiber Placement, Process Monitoring},
pubstate = {published},
tppubtype = {book}
}
Schmidt, Carsten; Behr, Matthias; Serna, Jonathan; Herwig, Alexander; Denkena, Berend; Horst, Peter; Meiners, Dieter
Dreidimensionale Faserverstärkung in additiv gefertigten Kunststoffbauteilen Artikel
In: VDI-Z Integrierte Produktion, Bd. 06-2018, 2018.
Abstract | Links | BibTeX | Schlagwörter:
@article{Schmidt2018,
title = {Dreidimensionale Faserverstärkung in additiv gefertigten Kunststoffbauteilen},
author = {Carsten Schmidt and Matthias Behr and Jonathan Serna and Alexander Herwig and Berend Denkena and Peter Horst and Dieter Meiners},
url = {https://www.vdi-z.de/2018/Ausgabe-06/Forschung-und-Praxis/Dreidimensionale-Faserverstaerkung-in-additiv-gefertigten-Kunststoffbauteilen},
year = {2018},
date = {2018-06-01},
journal = {VDI-Z Integrierte Produktion},
volume = {06-2018},
abstract = {Additive Fertigungsverfahren erfreuen sich einer großen Beliebtheit, insbesondere zur Herstellung von Einzelteilen und Kleinserien. Sie werden jedoch zunehmend auch dann eingesetzt, wenn das Ziel der Auslegung die Massereduktion bei gleichzeitiger Wahrung der mechanischen Bauteileigenschaf-ten ist. Beispiele hierfür sind topologieoptimierte, metallische Tragstrukturen, die den mechanisch isotropen Ausgangswerkstoff nur in belastungsrelevanten Bereichen aufweisen [1].
Eine weitere Massereduktion ist dann möglich, wenn Werkstoffe mit exzellenten gewichtsspezifi-schen Steifigkeiten und Festigkeiten eingesetzt werden. Da diese Werkstoffe zumeist anisotrope Materialeigenschaften aufweisen, ist deren optimale Ausnutzung nur durch eine exakte Ausrichtung entlang der Lastpfade möglich. Alternativ: Mit heutigen Fertigungstechnologien wie zum Beispiel dem Automated-Fiber-Placement ist dies allerdings nur in annähernd ebenen Strukturen umsetzbar.
Die Herausforderung besteht zukünftig darin, die Ablage von Verstärkungsfasern im dreidimensiona-len Raum zu ermöglichen und somit die Voraussetzung zur Herstellung topologieoptimierter Trags-trukturen unter Ausnutzung der gewichtspezifischen Vorteile anisotroper Werkstoffe zu schaffen.
},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Eine weitere Massereduktion ist dann möglich, wenn Werkstoffe mit exzellenten gewichtsspezifi-schen Steifigkeiten und Festigkeiten eingesetzt werden. Da diese Werkstoffe zumeist anisotrope Materialeigenschaften aufweisen, ist deren optimale Ausnutzung nur durch eine exakte Ausrichtung entlang der Lastpfade möglich. Alternativ: Mit heutigen Fertigungstechnologien wie zum Beispiel dem Automated-Fiber-Placement ist dies allerdings nur in annähernd ebenen Strukturen umsetzbar.
Die Herausforderung besteht zukünftig darin, die Ablage von Verstärkungsfasern im dreidimensiona-len Raum zu ermöglichen und somit die Voraussetzung zur Herstellung topologieoptimierter Trags-trukturen unter Ausnutzung der gewichtspezifischen Vorteile anisotroper Werkstoffe zu schaffen.
Fauster, Ewald; Berg, David Christian; May, David; Blößl, Yannick; Schledjewski, Ralf
Polynomial Surface Modelling of Flow Front Data for In-Plane Permeability Characterization of Textile Fabrics by Radial Flow Experiments Konferenzbeitrag
In: 14th International Conference on Flow Processes in Composite Materials (FPCM 14), (Hrsg.): 2018.
BibTeX | Schlagwörter: Flow Front, Modelling, Permeability
@inproceedings{Fauster2018,
title = {Polynomial Surface Modelling of Flow Front Data for In-Plane Permeability Characterization of Textile Fabrics by Radial Flow Experiments},
author = {Ewald Fauster and David Christian Berg and David May and Yannick Blößl and Ralf Schledjewski},
editor = {14th International Conference on Flow Processes in Composite Materials (FPCM 14)},
year = {2018},
date = {2018-06-01},
keywords = {Flow Front, Modelling, Permeability},
pubstate = {published},
tppubtype = {inproceedings}
}
Völtzer, Klaas
Online-Prozessüberwachung von Automated Fiber Placement Prozessen auf Basis der Thermografie Promotionsarbeit
Leibniz Universität Hannover, 2018.
Abstract | Links | BibTeX | Schlagwörter: Process Monitoring
@phdthesis{Völtzer2018b,
title = {Online-Prozessüberwachung von Automated Fiber Placement Prozessen auf Basis der Thermografie},
author = {Klaas Völtzer},
url = {https://www.researchgate.net/profile/Klaas-Voeltzer/publication/325415549_Online-Prozessuberwachung_von_Automated_Fiber_Placement_Prozessen_auf_Basis_der_Thermografie/links/5b0cee924585157f871cce28/Online-Prozessueberwachung-von-Automated-Fiber-Placement-Prozessen-auf-Basis-der-Thermografie.pdf},
year = {2018},
date = {2018-04-12},
school = {Leibniz Universität Hannover},
abstract = {Der steigende Einsatz von kohlenstofffaserverstärkten Kunststoffen (CFK), vor allem in der Luftfahrtindustrie, führt zu einer zunehmenden Bedeutung der CFK-Fertigungsverfahren, wie dem Automated Fiber Placement Prozess (AFP). Eine manuelle Überwachung dieses Prozesses ist aufgrund des geringen Kontrasts zwischen den einzelnen Laminatlagen erschwert und damit zeitintensiv und ineffizient. In dieser Arbeit wird eine neuartige Überwachungsmethode auf Basis der Thermografie vorgestellt und erforscht. Eine integrierte Infrarotkamera direkt hinter der Andruckeinheit des AFP-Legekopfes wertet dabei den Temperaturkontrast zwischen dem unmittelbar abgelegten
Faser-Matrix-Halbzeug und dem Untergrund sowie die generelle Temperaturverteilung aus. Über eine Detektion der Halbzeugkanten können Positionierungsfehler identifiziert werden. Ebenso können über eine Auswertung der Oberflächentemperaturen Anbindungsfehler oder Fremdkörper anhand von Temperaturanomalien detektiert werden. Mit einem prototypischen Überwachungssystem werden die Systemgrenzen aufgezeigt und die Funktionsfähigkeit anhand eines Beispielprozesses demonstriert.},
keywords = {Process Monitoring},
pubstate = {published},
tppubtype = {phdthesis}
}
Faser-Matrix-Halbzeug und dem Untergrund sowie die generelle Temperaturverteilung aus. Über eine Detektion der Halbzeugkanten können Positionierungsfehler identifiziert werden. Ebenso können über eine Auswertung der Oberflächentemperaturen Anbindungsfehler oder Fremdkörper anhand von Temperaturanomalien detektiert werden. Mit einem prototypischen Überwachungssystem werden die Systemgrenzen aufgezeigt und die Funktionsfähigkeit anhand eines Beispielprozesses demonstriert.
Groß, Lukas; Herwig, Alexander; Berg, David C.; Schmidt, Carsten; Denkena, Berend; Horst, Peter; Meiners, Dieter
Production-based design of a hybrid load introduction element for thin-walled CFRP Structures Artikel
In: Production Engineering, S. 8, 2018, ISSN: 1863-7353.
Abstract | Links | BibTeX | Schlagwörter: Automated Fiber Placement, Composite Structures, Embedded Load Introduction Element, Fiber-Metal Laminate, Multilayer Insert
@article{Groß2018,
title = {Production-based design of a hybrid load introduction element for thin-walled CFRP Structures},
author = {Lukas Groß and Alexander Herwig and David C. Berg and Carsten Schmidt and Berend Denkena and Peter Horst and Dieter Meiners},
url = {https://link.springer.com/article/10.1007/s11740-018-0821-4},
doi = {https://doi.org/10.1007/s11740-018-0821-4},
issn = {1863-7353},
year = {2018},
date = {2018-03-21},
journal = {Production Engineering},
pages = {8},
abstract = {The project “Multi-Layer Inserts” (MLI) proposes a new design for inserts used in thin-walled CFRP structures. The proposed inserts consist of multiple thin metal sheets and is build up simultaneously with the laminate in an intrinsic hybridization process, eliminating time-consuming post-processing steps. Furthermore, at equal weight, such inserts greatly increase the bonding area between metal and CFRP in comparison to conventional inserts. This results in a significant increase of the loads that can be transmitted into the CFRP. The present work discusses how the shape of the metal sheets which the proposed inserts consist of influences the mechanical properties of the surrounding laminate. This influence is investigated by measuring the strain distribution during tensile tests by means of digital image correlation. The strain distributions around the following three different MLI design approaches are compared: An elliptical metal sheet, which is expected to be ideal in terms of mechanical performance of the overall structure; a cross-shape metal sheet representing a production-driven simplification which only requires the ability to perform cuts in individual tows perpendicular to the laying direction and can be performed by state-of-the-art AFP systems; and lastly, a compromise between manufacturability and achieved mechanical performance, a decagonal metal sheet design, which requires angled cuts of the fiber tows. It is shown, that the decagon is able to evenly spread the strain over a larger area and is therefore able to significantly reduce the maximum strain values compared to a cross-shape metal sheet, while still being automatable.},
keywords = {Automated Fiber Placement, Composite Structures, Embedded Load Introduction Element, Fiber-Metal Laminate, Multilayer Insert},
pubstate = {published},
tppubtype = {article}
}
Deniz, Onur
Production-Based Multi-Criteria Design Optimisation of Stiffened Composite Fuselage Structures Buch
2018, ISBN: 978-3-947623-06-8.
Abstract | BibTeX | Schlagwörter: Design Method, Design Optimization
@book{Deniz2018,
title = {Production-Based Multi-Criteria Design Optimisation of Stiffened Composite Fuselage Structures},
author = {Onur Deniz},
isbn = {978-3-947623-06-8},
year = {2018},
date = {2018-03-08},
abstract = {The current applications of the composite materials in the commercial aviation are carried out only on the material level by slight adjustments while maintaining the traditional design topology, due to the fact that the composite materials are prone to each manufacturing step leading to formidable challenges particularly in seeking innovative concepts. Therefore, multi-disciplinary criteria must be addressed in the design of innovative composite air-frames such as structural failure, weight savings, economic efficiency, manufacturability, production deviations and defects leading to reoccurring manual phases between the design engineers and manufacturers. Existing design methodologies lack in the comprehensive con-sideration of such aspects. Hence, the realisation of cutting-edge composite designs aiming to reduce structural weight as well as the direct operating costs, becomes inefficient and time-consuming by the current design methodologies. The aim of the dissertation is to develop and demonstrate a multi-criteria design method-ology for the production-oriented design of innovative stiffened airframes. The methodology is composed based on the interdisciplinary interaction between the structural design and the production during the product development covering the above addressed issues in the com-posite design. For the implementation of the methodology, a multi-disciplinary design envi-ronment was built by the interdisciplinary parametric representations of structures and pro-cesses in an interactive framework consisting of several modules. The structural modules carry out automated Finite Element (FE) modelling for the stability and material failure cal-culations of a wide variety of stiffened panel designs whereas the process modules conduct manufacturing and cost analysis of arbitrary components. This includes, in particular, manu-facturability analysis of an automated fibre placement process, including the tow-gap esti-mation which is validated by an experimental setup as well as the drapability analysis of fabrics with the identification of fibre misalignments which is coupled with the FE models. Moreover, the economic aspects of the structural design are addressed by estimating the production costs through the process models belonging to a user-defined production chain. The framework composes interdisciplinary criteria into a fitness value by an evaluation model for the ranking and the development of structures (individuals) by a coupled evolu-tionary optimisation environment. The applicability of the developed methodology is first demonstrated by the cost-weight optimisations of conventionally stiffened panel concepts with varying stiffener topologies under the influences of associated process histories. Consequently, the framework is em-ployed for the cost-weight optimisation of a newly developed unconventionally stiffened Lattice-Grid panel under the influences of newly developed manufacturing systems. The developed framework generates a set of process-oriented (defect-free) designs with realistic cost-weight trade-offs as well as their production chain for the preference of the user. The obtained solutions satisfy the multi-disciplinary criteria such as structural integrity, manu-facturability and economical requirements based on a user defined business model.},
keywords = {Design Method, Design Optimization},
pubstate = {published},
tppubtype = {book}
}
Deniz, Onur
Multi-Criteria Methodology for the Production-Oriented Optimisation of Composite Aircraft Structures Promotionsarbeit
Technische Universität Braunschweig, 2018, ISBN: 978-3-947623-06-8.
Abstract | BibTeX | Schlagwörter: Design Optimization, Light Weight Construction
@phdthesis{Deniz2018b,
title = {Multi-Criteria Methodology for the Production-Oriented Optimisation of Composite Aircraft Structures},
author = {Onur Deniz},
isbn = {978-3-947623-06-8},
year = {2018},
date = {2018-03-08},
school = {Technische Universität Braunschweig},
abstract = {The current applications of the composite materials in the commercial aviation are carried out only on the material level by slight adjustments while maintaining the traditional design topology, due to the fact that the composite materials are prone to each manufacturing step leading to formidable challenges particularly in seeking innovative concepts. Therefore, multi-disciplinary criteria must be addressed in the design of innovative composite air-frames such as structural failure, weight savings, economic efficiency, manufacturability, production deviations and defects leading to reoccurring manual phases between the design engineers and manufacturers. Existing design methodologies lack in the comprehensive con-sideration of such aspects. Hence, the realisation of cutting-edge composite designs aiming to reduce structural weight as well as the direct operating costs, becomes inefficient and time-consuming by the current design methodologies. The aim of the dissertation is to develop and demonstrate a multi-criteria design method-ology for the production-oriented design of innovative stiffened airframes. The methodology is composed based on the interdisciplinary interaction between the structural design and the production during the product development covering the above addressed issues in the com-posite design. For the implementation of the methodology, a multi-disciplinary design envi-ronment was built by the interdisciplinary parametric representations of structures and pro-cesses in an interactive framework consisting of several modules. The structural modules carry out automated Finite Element (FE) modelling for the stability and material failure cal-culations of a wide variety of stiffened panel designs whereas the process modules conduct manufacturing and cost analysis of arbitrary components. This includes, in particular, manu-facturability analysis of an automated fibre placement process, including the tow-gap esti-mation which is validated by an experimental setup as well as the drapability analysis of fabrics with the identification of fibre misalignments which is coupled with the FE models. Moreover, the economic aspects of the structural design are addressed by estimating the production costs through the process models belonging to a user-defined production chain. The framework composes interdisciplinary criteria into a fitness value by an evaluation model for the ranking and the development of structures (individuals) by a coupled evolu-tionary optimisation environment. The applicability of the developed methodology is first demonstrated by the cost-weight optimisations of conventionally stiffened panel concepts with varying stiffener topologies under the influences of associated process histories. Consequently, the framework is em-ployed for the cost-weight optimisation of a newly developed unconventionally stiffened Lattice-Grid panel under the influences of newly developed manufacturing systems. The developed framework generates a set of process-oriented (defect-free) designs with realistic cost-weight trade-offs as well as their production chain for the preference of the user. The obtained solutions satisfy the multi-disciplinary criteria such as structural integrity, manu-facturability and economical requirements based on a user defined business model.},
keywords = {Design Optimization, Light Weight Construction},
pubstate = {published},
tppubtype = {phdthesis}
}
Herwig, Alexander; Horst, Peter; Schmidt, Carsten; Pottmeyer, Florentin; Weidenmann, Kay André
In: Production Engineering, 2018, ISSN: 1863-7353.
Abstract | Links | BibTeX | Schlagwörter: Embedded Load Introduction Element, Fiber-Metal Laminate, Joining, Polymer-matrix composites (PMCs)
@article{Herwig2018,
title = {Design and mechanical characterisation of a layer wise build AFP insert in comparison to a conventional solution},
author = {Alexander Herwig and Peter Horst and Carsten Schmidt and Florentin Pottmeyer and Kay André Weidenmann},
editor = {Springer Berlin Heidelberg},
url = {https://link.springer.com/article/10.1007%2Fs11740-018-0815-2},
doi = {https://doi.org/10.1007/s11740-018-0815-2},
issn = {1863-7353},
year = {2018},
date = {2018-03-06},
journal = {Production Engineering},
abstract = {Joining methods that present a detachable connection of thin walled fiber reinforced plastic (FRP) structures greatly increase the proliferation of lightweight FRP-parts. This paper describes the design of a new layer wise build insert solution named multilayer insert (MLI) in a comparative study in terms of mechanical performance. The MLI is designed to be easily integrable into existing automated fiber placement processes. The mechanical characteristics and damage behavior of the MLI is compared with a commercially available insert serving as reference. Comparable results are obtained by testing the specimen in the same test setup. Both, the results of the MLI and the reference specimen show that a geometrical optimization is able to change the failure modes of the connection thereby keeping the surrounding FRP intact while improving the mechanical performance of the entire component.},
keywords = {Embedded Load Introduction Element, Fiber-Metal Laminate, Joining, Polymer-matrix composites (PMCs)},
pubstate = {published},
tppubtype = {article}
}
2017
Denkena, Berend; Horst, Peter; Schmidt, Carsten; Behr, Matthias; Krieglsteiner, Joscha
Estimation of production cost in an early design stage of CFRP lightweight structures Artikel
In: Procedia CIRP, Bd. 62, S. 45-50, 2017.
Abstract | Links | BibTeX | Schlagwörter: Composite Structures, Design Method, Planning, Production
@article{Denkena2017,
title = {Estimation of production cost in an early design stage of CFRP lightweight structures },
author = {Berend Denkena and Peter Horst and Carsten Schmidt and Matthias Behr and Joscha Krieglsteiner},
url = {http://ac.els-cdn.com/S2212827116306497/1-s2.0-S2212827116306497-main.pdf?_tid=3a995538-9417-11e7-b3af-00000aacb35f&acdnat=1504821494_6d4b8f585d0dab563050c677069e40d1},
year = {2017},
date = {2017-09-01},
journal = { Procedia CIRP},
volume = {62},
pages = {45-50},
abstract = {Development of composite structure which are both light and economically competitive is challenging. A new method for the development of CRFP lightweight structures implements a frequent interaction of design and production planning starting in an early design stage. As part of this, production alternatives need to be compared in terms of cost and impact on structural mass. This paper describes how a software module automatically determines suitable process chains based on a preliminary structural design. Cost of production is estimated using analytical process models dealing with imprecise design information. Applied to an aircraft fuselage panel, the method estimates cost and mass of different production alternatives.},
keywords = {Composite Structures, Design Method, Planning, Production},
pubstate = {published},
tppubtype = {article}
}
Schmidt, Carsten; Weber, Patricc; Hocke, Tristan; Denkena, Berend
Influence of Prepreg Material Quality on Carbon Fiber Reinforced Plastic Laminates Processed by Automated Fiber Placement Konferenzbeitrag
In: 11th CIRP Conference on Intelligent Computation in Manufacturing Engineering, (Hrsg.): Neapel, 2017.
Abstract | BibTeX | Schlagwörter: Automated Fiber Placement
@inproceedings{Schmidt2017b,
title = {Influence of Prepreg Material Quality on Carbon Fiber Reinforced Plastic Laminates Processed by Automated Fiber Placement},
author = {Carsten Schmidt and Patricc Weber and Tristan Hocke and Berend Denkena},
editor = {11th CIRP Conference on Intelligent Computation in Manufacturing Engineering},
year = {2017},
date = {2017-07-19},
address = {Neapel},
abstract = {In this paper, the influence of prepreg material quality to the mechanical properties of CFRP parts is presented. During the out life of prepreg slit tape, the processability changes by aging especially when storing the material at room temperature. Therefore, investigations are done with an in-house developed AFP machine and are monitored with a thermal monitoring system to determine the influence of material aging to mechanical properties and changes in the manufacturing process. The manufactured CFRP plates are finally tested by 3-point bending test.},
keywords = {Automated Fiber Placement},
pubstate = {published},
tppubtype = {inproceedings}
}
Schmidt, Carsten; Denkena, Berend; Hocke, Tristan; Völtzer, Klaas
1st CIRP Conference on Composite Materials Parts Manufacturing, 2017.
Links | BibTeX | Schlagwörter: Automated Fiber Placement, Process Monitoring, Quality Assurance, Thermal Imaging
@conference{Schmidt2017b,
title = {Influence of AFP process parameters on the temperature distribution used for thermal in-process monitoring},
author = {Carsten Schmidt and Berend Denkena and Tristan Hocke and Klaas Völtzer},
editor = {Procedia CIRP 66},
doi = {10.1016/j.procir.2017.03.220},
year = {2017},
date = {2017-06-07},
booktitle = {1st CIRP Conference on Composite Materials Parts Manufacturing},
pages = {68-73},
keywords = {Automated Fiber Placement, Process Monitoring, Quality Assurance, Thermal Imaging},
pubstate = {published},
tppubtype = {conference}
}
Brüning, Jan; Denkena, Berend; Dittrich, Marc-Andre; Hocke, Tristan
Machine Learning Approach for Optimization of Automated Fiber Placement Processes Konferenz
2017.
Links | BibTeX | Schlagwörter: Automated Fiber Placement, Industry 4.0, Process Monitoring
@conference{Brüning2017b,
title = {Machine Learning Approach for Optimization of Automated Fiber Placement Processes},
author = {Jan Brüning and Berend Denkena and Marc-Andre Dittrich and Tristan Hocke},
editor = {Procedia CIRP 66},
doi = {10.1016/j.procir.2017.03.295},
year = {2017},
date = {2017-06-07},
pages = {74-78},
keywords = {Automated Fiber Placement, Industry 4.0, Process Monitoring},
pubstate = {published},
tppubtype = {conference}
}
Serna, Jonathan
Krafteinleitung in dünnwandige Strukturen durch lokale Hybridisierung Konferenz
2017.
BibTeX | Schlagwörter: Multilayer Insert
@conference{Serna2017,
title = {Krafteinleitung in dünnwandige Strukturen durch lokale Hybridisierung},
author = {Jonathan Serna},
year = {2017},
date = {2017-05-15},
journal = {DGM Sitzung FA „Hybride Werkstoffe und Strukturen“},
keywords = {Multilayer Insert},
pubstate = {published},
tppubtype = {conference}
}
Schmidt, Carsten; Denkena, Berend; Hocke, Tristan; Völtzer, Klaas
Thermal imaging as a solution for reliable monitoring of AFP processes Konferenz
3rd ACM Automated Composites Manufacturing, Montreal, Canada, 2017.
BibTeX | Schlagwörter: Automated Fiber Placement, Industry 4.0, Manufacturing Quality, Process Monitoring, Thermal Imaging
@conference{Schmidt2017,
title = {Thermal imaging as a solution for reliable monitoring of AFP processes},
author = {Carsten Schmidt and Berend Denkena and Tristan Hocke and Klaas Völtzer},
year = {2017},
date = {2017-04-20},
booktitle = {3rd ACM Automated Composites Manufacturing},
address = {Montreal, Canada},
keywords = {Automated Fiber Placement, Industry 4.0, Manufacturing Quality, Process Monitoring, Thermal Imaging},
pubstate = {published},
tppubtype = {conference}
}
Brüning, Jan; Schmidt, Carsten; Denkena, Berend
Erhöhung der Prozesssicherheit von Automated-Fiber-Placement-Prozessen Artikel
In: Ingenieurspiegel, Bd. 1, S. 29-31, 2017.
Abstract | BibTeX | Schlagwörter: Composite Structures, Process Monitoring, Thermal Imaging
@article{Brüning2017,
title = {Erhöhung der Prozesssicherheit von Automated-Fiber-Placement-Prozessen},
author = {Jan Brüning and Carsten Schmidt and Berend Denkena},
year = {2017},
date = {2017-01-16},
journal = {Ingenieurspiegel},
volume = {1},
pages = {29-31},
abstract = {In der Luftfahrtindustrie ist Automated Fiber Placement (AFP) eine der führenden Fertigungstechnologien für die kosteneffektive Serienproduktion von hochqualitativen Leichtbaustrukturen. Allerdings bieten sowohl die automatisierten Fertigungssysteme als auch die Prozessplanungssysteme noch ungenutzte Verbesserungspotenziale hinsichtlich Zuverlässigkeit und Effizienz.},
keywords = {Composite Structures, Process Monitoring, Thermal Imaging},
pubstate = {published},
tppubtype = {article}
}
2016
Denkena, Berend; Schmidt, Carsten; Weber, Patricc
Automated Fiber Placement Head for Manufacturing of Innovative Aerospace Stiffening Structures Artikel
In: Procedia Manufacturing, Bd. 6, S. 96-104, 2016.
Abstract | Links | BibTeX | Schlagwörter: Automated Fiber Placement, Light Weight Construction, Manufacturing Quality, Prepreg
@article{Denkena2016b,
title = {Automated Fiber Placement Head for Manufacturing of Innovative Aerospace Stiffening Structures},
author = {Berend Denkena and Carsten Schmidt and Patricc Weber},
url = {http://www.sciencedirect.com/science/article/pii/S2351978916301494},
doi = {http://dx.doi.org/10.1016/j.promfg.2016.11.013},
year = {2016},
date = {2016-11-21},
journal = {Procedia Manufacturing},
volume = {6},
pages = {96-104},
abstract = {In the research project “High-performance Production of CFRP Structures” (HP CFK) a new automated fiber placement (AFP) system for laying thermoset CFRP (carbon fiber-reinforced plastic) slit tapes was developed. Its novel, modular designed laying head faces current industrial needs and challenges of prospective carbon light weight applications, e. g. future aerospace stiffening structures. Thus, its compaction unit is optimized for producing complex-curved structures. To allow approximating slopes on curved geometries, it consists of several height-adjustable rollers which, in addition, are each pressure controlled to enable an individual compacting pressure for the lay-up on materials with different compression strength (e. g. foams, metals). Furthermore, the design of the laying heads cutting unit aided the manufacturing of complex structures while being located as near as possible to the nip point to allow very short minimum placement paths. This paper introduces into the general design of the modular laying head as well as preliminary results of validation studies regarding several process limits.},
keywords = {Automated Fiber Placement, Light Weight Construction, Manufacturing Quality, Prepreg},
pubstate = {published},
tppubtype = {article}
}
Schmidt, Carsten; Völtzer, Klaas; Hocke, Tristan; Brüning, Jan
Bahnplanung für Automated-Fiber-Placement-Prozesse Artikel
In: Lightweight Design, Bd. 4, 2016.
BibTeX | Schlagwörter: Automated Fiber Placement, Path Planning, Process Monitoring, Thermal Imaging
@article{Schmidt2016b,
title = {Bahnplanung für Automated-Fiber-Placement-Prozesse},
author = {Carsten Schmidt and Klaas Völtzer and Tristan Hocke and Jan Brüning},
year = {2016},
date = {2016-09-15},
journal = {Lightweight Design},
volume = {4},
keywords = {Automated Fiber Placement, Path Planning, Process Monitoring, Thermal Imaging},
pubstate = {published},
tppubtype = {article}
}
Horst, Peter; Woidt, Malte; Herwig, Alexander
Comparison of one-, two- and three-dimensional models of a metallic insert in a composite Konferenzbeitrag
In: FDM - 15th international conference on fracture and damage mechanics, Alicante, Spain, 2016.
BibTeX | Schlagwörter: Multilayer Insert
@inproceedings{Horst2016,
title = {Comparison of one-, two- and three-dimensional models of a metallic insert in a composite},
author = {Peter Horst and Malte Woidt and Alexander Herwig},
year = {2016},
date = {2016-09-14},
booktitle = {FDM - 15th international conference on fracture and damage mechanics},
address = {Alicante, Spain},
keywords = {Multilayer Insert},
pubstate = {published},
tppubtype = {inproceedings}
}
Denkena, Berend; Schmidt, Carsten; Völtzer, Klaas; Hocke, Tristan
POTENTIAL OF THERMAL INLINE MONITORING IN AUTOMATED FIBER PLACEMENT PROCESS FOR AEROSPACE APLICATIONS Konferenz
7th International Symposium on Composites Manufacturing for High Performance Applications - ISCM, Braunschweig, 2016.
BibTeX | Schlagwörter: Automated Fiber Placement, Process Monitoring, Thermal Imaging
@conference{Denkena2016b,
title = { POTENTIAL OF THERMAL INLINE MONITORING IN AUTOMATED FIBER PLACEMENT PROCESS FOR AEROSPACE APLICATIONS},
author = {Berend Denkena and Carsten Schmidt and Klaas Völtzer and Tristan Hocke},
year = {2016},
date = {2016-08-25},
booktitle = {7th International Symposium on Composites Manufacturing for High Performance Applications - ISCM},
address = {Braunschweig},
keywords = {Automated Fiber Placement, Process Monitoring, Thermal Imaging},
pubstate = {published},
tppubtype = {conference}
}
Schmidt, Carsten; Denkena, Berend; Groß, Lukas
Concept for automated production of CFRP-metal hybrid compounds integrated in an Automated Fiber Placement process Konferenz
10th CIRP Conference on Intelligent Computation in Manufacturing Engineering, Neapel, Italien, 2016.
Abstract | BibTeX | Schlagwörter: Automated Fiber Placement, Composite Structures, Intrinsic Hybridisation, Multilayer Insert
@conference{Schmidt2016b,
title = {Concept for automated production of CFRP-metal hybrid compounds integrated in an Automated Fiber Placement process},
author = {Carsten Schmidt and Berend Denkena and Lukas Groß},
year = {2016},
date = {2016-08-25},
booktitle = {10th CIRP Conference on Intelligent Computation in Manufacturing Engineering},
address = {Neapel, Italien},
abstract = {To solve the problem of load transmission into thin walled CFRP Structures, a new joining technology is being developed (Multi Layer Insert – MLI). It consists of multiple thin metal foils to distribute load optimally into every single CFRP layer. The placement process for the metal layers is integrated into an Automated Fiber Placement system. In this paper, a process sequence of MLI placement is presented containing the following steps: stockpiling of metal layers, separation, handling, positioning, lay up and fixation of metal layers during fiber placement. Moreover, the monitoring and control concept is discussed.},
keywords = {Automated Fiber Placement, Composite Structures, Intrinsic Hybridisation, Multilayer Insert},
pubstate = {published},
tppubtype = {conference}
}