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PREDICTING WRINKLE FORMATION IN COMPONENTS MANUFACTURED FROM TOUGHENED UD PREPREG

Jonathan Belnoue (University of Bristol) James Kratz (University of Bristol) Oliver Nixon-Pearson (University of Bristol) Tassos Mesogitis (University of Bristol) Dmitry Ivanov (University of Bristol) Stephen Hallett (University of Bristol)

 

The paper proposes a new numerical framework for the prediction of wrinkle formation in composite manufacturing. Two industry relevant cases (i.e. a gaps and overlaps specimen and a stepped laminate) are analysed using this new method.

 

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PROCESS-INDUCED DISTORTIONS OF COMPOSITE STRUCTURES DUE TO THROUGH-THICKNESS FIBRE-VOLUME-FRACTION GRADIENTS

Fabian Groh (German Aerospace Center) Erik Kappel (German Aerospace Center) Christian Hühne (German Aerospace Center) Florian Meyer (Audi AG)

 

A comprehensive experimental study on the effect of a V f -gradient on process induced deformations (PID). Result: Occurring local asymmetries are a second underlying mechanism for PID besides the classical spring-in for RTM parts.

 

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CHARACTERIZATION AND MODELLING OF SPRING-IN EFFECT ON Z-SHAPE COMPOSITE PART

Camille Sonnenfeld (ONERA-The French aerospace Lab) Romain Agogué (ONERA-The French aerospace Lab) Pierre Beauchêne (ONERA-The French aerospace Lab) Yasir Nawab (Université du Havre) Abdelghani Saouab (Université du Havre) Emmanuel Anfray (Aircelle Ltd, SAFRAN Group) Bertrand Desjoyeaux (Aircelle Ltd, SAFRAN Group)

 

This study focuses on the characterization and modeling of of spring-in effect on Z-shape composite part manufactured with resin transfer molding process.

 

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CHARACTERIZATION OF THE MULTI-AXIAL MATERIAL BEHAVIOR OF POLYMER FOAMS DURING RTM PROCESS

Jens Gerstenkorn (Karlsruhe Institute of Technology) Martin H. Kothmann (Audi AG) Felix Diebold (Audi AG) Günter Deinzer (Audi AG) Luise Kärger (Karlsruhe Institute of Technology) Frank Henning (Karlsruhe Institute of Technology)

 

The presented study deals with the characterization of the multi-axial material behavior of polymer foams under RTM process related conditions.

 

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CHARACTERIZATION OF TOOL-PART-INTERACTION AND INTERLAMINAR FRICTION FOR MANUFACTURING PROCESS SIMULATION

Tobias A. Weber (Airbus Helicopters) Jane J. Tellis (Airbus Helicopters) Miro Duhovic (Institute for Composite Materials)

 

The paper explains and compares two testing methods for tool-part-interaction and interlaminar friction. The results are discussed, the factors influencing the two types of friction are identified and their interactions determined.

 

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THE INFLUENCE OF MOISTURE ON THE DE-CONSOLIDATION BEHAVIOUR OF CARBON FIBER REINFORCED PA-6 LAMINATES

Thomas Guglhoer (University of Augsburg) Markus Sause (University of Augsburg)

 

De-consolidation behavior of dried and wet carbon fiber reinforced Polyamide 6 laminates was investigated via compression tests at elevated temperature. X-ray computed tomography and microscopy reveals an increase in porosity during heat treatment.

 

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DUAL FLOW FRONT MEASUREMENTS FOR IMPROVED PERMEABILITY CHARACTERISATION

Mikhail Matveev (University of Nottingham) Arthur Jones (University of Nottingham) Andrew Long (University of Nottingham) Andreas Endruweit (University of Nottingham)

 

A comparison of two experimental techniques for flow front tracking for measuring the unsaturated permeability of fibre reinforcements is presented: one based on pressure transducers and the other using video recording of the evolving flow front.

 

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EXPERIMENTAL INVESTIGATION OF TEXTILE PERMEABILITY IN THE PRESENCE OF SPHERICAL INCLUSIONS

Baris Caglar (Koc University - Ecole Polytechnique Fédérale de Lausanne) Véronique Michaud (EPFL) E. Murat Sozer (Koc University - Ecole Polytechnique Fédérale de Lausanne)

 

For increasing content of hard spherical inclusions, in-plane permeability of a woven fabric is measured to decrease if inclusion diameter is smaller than the interbundle gap, while a non-monotonic relationship is observed for larger inclusions.

 

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GEOMETRICAL INVESTIGATION FOR THE ELECTRICAL CHARACTERIZATION OF T700/M21 CFRP COMPOSITE DURING CURING

Sonia Sassi (Université de Technologie de Compiègne) Philippe Marguerès (Université de Toulouse) M. Mounkaila (Équipe Nano Ingénierie et Intégration des Systèmes) Thierry Camps (Équipe Nano Ingénierie et Intégration des Systèmes) Philippe Olivier (Université de Toulouse)

 

In the aim to use the electrical response of unidirectional CFRP during curing, geometrical parameters should be measured and correlated with each other both at local and global scales taking into account anisotropy and rheological transitions.

 

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MEASUREMENTS OF DIMENSIONAL VARIATIONS OF SMC COMPOSITES DURING THE CURING CYCLE

Romain Cardinaud (Plastic Omnium) Mael Peron (University of Nantes) Vincent Sobotka (University of Nantes) Nicolas Boyard (University of Nantes) Steven Le Corre (University of Nantes) Mustafa Sager (Plastic Omnium)

 

The dimensional variations of a SMC material are investigated in using a standard linear dilatometer, the PVT-α mould and a new specific device called HADDOC, in order to determine the thermal expansion and chemical shrinkage coefficients.

 

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