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ANALYSES AND VALIDATION TESTING OF A PIEZO SENSOR BASED PROCESS MONITORING SYSTEM AS INTEGRAL PART OF AN INTEGRATED PROCESS AND STRUCTURAL HEALTH MONITORING SYSTEM FOR CFRP REINFORCEMENTS MADE BY RTM
Michael Scheerer (Aerospace & Advanced Composites GmbH) Zoltan Simon (Aerospace & Advanced Composites GmbH) Michael Marischler (Aerospace & Advanced Composites GmbH) Tim Roser (Airbus Helicopters) Bernhard Rittenschober (ALPEX Technologies GmbH)
Within this paper the authors present detailed simulation and experimental results of the process monitoring part of a novel integrated process and structural health monitoring system based on piezo sensors for CFRP reinforcements made by RTM.
ASSESSING THE RELIABILITY OF FILLING SIMULATIONS FOR RTM: CRITICAL COMPARISON OF THEORETICAL AND REALISTIC PERMEABILITY OF TYPICAL CURVATURES ENCOUNTERED IN RTM PREFORMS
Spiridon Konstantopoulos (Montanuniversitaet Leoben) Ralf Schledjewski (Montanuniversitaet Leoben)
Permeability of curvatures found in RTM is analyzed using flow sensors. A model is developed for interpretation to curvature permeability and the differences from in-plane permeability or theoretically expected draped permeability are discussed.
CURE INDUCED MULTI-AXIAL STRAIN DEVELOPMENT IN CURVED COMPOSITE COMPONENTS: FIBER-OPTIC-BASED MONITORING AND NUMERICAL ANALYSIS
Takagaki Kazunori (University of Tokyo) Shu Minakuchi (University of Tokyo) Nobuo Takeda (University of Tokyo)
Cure induced deformation (i.e. Spring-in) occurs in complex CFRP components. This research embedded optical fiber sensors into the diagonal directions in L-shaped parts and measured the through-thickness normal and shear strain using the sensors.
DETERMINATION OF INTERACTIONS BETWEEN BAR SPREADING PROCESS PARAMETERS AND SPREADING QUALITY FOR THE DEVELOPMENT OF AN AUTOMATED QUALITY CONTROL OF SPREAD HIGH MODULUS FIBER TOWS
Lars Appel (RWTH Aachen University) Adrian Kerber (RWTH Aachen University) Bahoz Abbas (RWTH Aachen University) Sabina Jeschke (RWTH Aachen University) Thomas Gries (RWTH Aachen University)
The paper presents a bar spreading process study for the determination of the influencing effects on the spreading width and the quality of the spread tow. Furthermore, regression models are generated from the results of the study.
DEVELOPING CONTROL SYSTEMS FOR THE RADIAL BRAIDING PROCESS
Viktor Reimer (RWTH Aachen University) Mikhail Persiyanov-Dubrov (RWTH Aachen University) Josef Dawson (University of Canterbury) Thomas Gries (RWTH Aachen University)
This paper describes the first step to develop a Model-Based Self Optimizing (MBSO) system for radial over-braiding process: designing a feedback loop to control the braiding angle.
FROM LAB TO FACTORY: A KNOWLEDGE BASED APPROACH TO UNDERSTANDING AND LOWERING THE BARRIERS TO NEW TECHNOLOGY UPTAKE IN INDUSTRY, AS APPLIED TO IN-PROCESS MONITORING OF COMPOSITE MATERIALS.
Laura Rhian Pickard (University of Bristol) Ivana Partridge (University of Bristol) Paul Shakespeare (University of Bristol)
A comparison of knowledge transfer in academia and industry, to facilitate industrial uptake of in-process monitoring technologies.
IN-LINE MONITORING DURING PRODUCTION OF COMPOSITES BASE MATERIAL AND PREPREGS: HIGHER QUALITY DECREASES COSTS AND INCREASES CUSTOMER SATISFACTION
Hans Oerley (Dr. Schenk GmbH Industriemesstechnik)
Automatic optical inspection (AOI) systems are applied as in-line production process control. Covering the full width of the material they detect irregularities in composite materials and monitor material properties (i.e. fibre web formation, ...).
TESTS FOR THE CHARACTERIZATION OF FIBER REINFORCED AUTOCLAVED AERATED CONCRETE
Maria Bruna Alba (ENEA) Tiziana Cardinale (ENEA) Piero De Fazio (ENEA) G. F. Lista (ENEA) Corradino Sposato (ENEA)
Main aim of this paper is to verify how the addition of basalt fibers to autoclaved aerated concrete may improve its the performance from a mechanical point of view. The composite material has been characterized according to the standard rules.
ON THE OBSERVATION OF FLOW FRONT POSITION UNDER VARIABLE INLET PRESSURE
Luis Pina (INEGI) Fernando Silva (INEGI) Masoud Bodaghi (INEGI) F. Gomes de Almeida (INEGI)
This paper describes the influence of variable inlet pressure on the flow front position and velocities in a one dimensional vacuum infusion process. Analytical models are derived for simulation proposes.
ONLINE DETECTION AND CATEGORISATION OF DEFECTS ALONG CARBON FIBER PRODUCTION USING A HIGH RESOLUTION, HIGH WIDTH LINE SCAN VISION SYSTEM
Steffen Geinitz (Fraunhofer ICT) André Wedel (Fraunhofer ICT) Andreas Margraf (Fraunhofer ICT)
An optical system for the detection of fabrication defects during carbon fibre production and binder application is developed. The system allows a large scan width at high resolution, while maintaining data transfer at a minimum.
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