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Ulf Henning Neumann (Airbus Group Innovations) Peter Mitschang (Institute for Composite Materials) Christian Weimer (Airbus Group Innovations) Andreas Gessler (Airbus Group Innovations)
This paper presents the influence shares of ultrasonic welding parameters for preforming of bindered dry fiber materials. Furthermore a comparision to conventional technologies will be shown regarding the compaction behavior and time efficents.
Using the example of automated preforming, the article introduces a holistic development approach, which covers process selection and process design as well as error detection and mechanical analysis of manufacturing effects on the part performance.
Julian Fial (University of Stuttgart) Patrick Böhler (University of Stuttgart) Peter Middendorf (University of Stuttgart)
This paper gives an insight in advanced forming of tailored fibre placement preforms. Local fibre tow manipulation is used to create three-dimensional structures. A mesoscopic reverse draping simulation provides the corresponding TFP yarn paths.
Pascal Hubert (McGill University) Volker Hombach (Klevers GmbH & Co. KG) Marcel Haeske (Klevers GmbH & Co. KG) D. Neumann (RWTH Aachen University) Thomas Gries (RWTH Aachen University)
The paper describes a route toward tailored fabrics that are specially designed and fabricated according to requirements of the FRP manufacturer. Therefore empiric relations between the weave process and the FRP properties are established by testing.
Neven Majic (Cevotec GmbH) Herbert Weidinger (Cevotec GmbH) Felix Michl (Cevotec GmbH) Klaus Drechsler (Technical University of Munich / Institute for Carbon Composites)
The presented work shows a study on the performance of patch-based composites compared to composites with quasi-isotropic (QI) laminate. Experimental results including a digital image correlation will be used to evaluate the simulation results.
Bernhard Horn (Technical University of Munich) Christoph Ebel (Technical University of Munich / Institute for Carbon Composites) Klaus Drechsler (Technical University of Munich / Institute for Carbon Composites)
Patched laminates show a premature failure due to high peeling forces in the outer plies. The influence of these stresses on specimens with different amount of layers and strategies to reduce this effect are presented.
Michael Kühnel (German Aerospace Center) Alfons Schuster (German Aerospace Center) Christian Rähtz (German Aerospace Center) Michael Kupke (German Aerospace Center)
In contrast to existing, inflexible and costly production lines and with respect to industry’s needs DLR invented a highly flexible and continuously automated process chain “from fabric delivery to the tailored preform” with comparably low invest.
Ashley Barnes (Rolls-Royce / University of Bristol) James Tingle (Rolls-Royce Plc) James Lee (Rolls-Royce Plc)
In an experimental study, a series of 12 ply laminates were Automated Fibre Placed and measured for the edge of ply accuracy to nominal definition, determining process capability and key error contributions.
The paper focuses on the ATP process simulation in the frame of the STELLAR project, and especially on the laser simulation to assess the heating flux boundary conditions, chaining with an explicit 3D thermo-mechanical simulation of the ATP process.
Isabel Martín (FIDAMC) Antonio Fernández-López (Universidad Politécnica de Madrid) A. Güemes (Universidad Politécnica de Madrid) Fernando Rodríguez (FIDAMC)
The application of deconvolution and optimization methods to the exothermal peaks of crystallization over PEEK and CF/PEEK.
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