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MONITORING FATIGUE DAMAGE IN CFRP USING ULTRASONIC BIREFRINGENCE
Peter Fey (University of Stuttgart) Marc Kreutzbruck (University of Stuttgart)
The progress of fatigue damage in CFRP under cyclic tensile load was monitored non-destructively using ultrasonic birefringence. Using a physics based model, the damage state of each fibre direction in a quasi-isotropic layup could be quantified.
MOBILE NON-DESTRUCTIVE TESTING METHODS FOR SURFACE CHARACTERIZATION OF CFRP IN AEROSPACE
Sebastian Heckner (Airbus Group Innovations) Christian Grosse (Technical University of Munich) Sebastian Eibl (Bundeswehr research institute for materials, fuels and lubricants (WIWeB)) Andreas Helwig (Airbus Group Innovations) Matthias Geistbeck (Airbus Group Innovations)
This paper presents Non-Destructive Testing (NDT) techniques for detecting thermal degradation of the polymer matrix and silicone based release agent residues on Carbon Fiber Reinforced Plastic (CFRP) surfaces.
PREDICTION OF TENSILE STRENGTH OF UNIDIRECTIONAL CARBON FIBER/EPOXY COMPOSITES USING THE FRAGMENTATION TEST
Jun Watanabe (Toray) Fumihiko Tanaka (Toray) Ryo Higuchi (Graduate School of Tohoku University) Hiroaki Matsutani (Toray) Haruki Okuda (Toray) Tomonaga Okabe (Tohoku University)
We investigated the fiber breakage behavior of unidirectional carbon fiber-reinforced epoxy matrix composites, estimated by taking into account the stress concentration in the adjacent fibers that results from matrix cracking around fiber breakages.
ANALYSIS OF POLYMERIZATION SHRINKAGE VECTORS OF PHOTO-CURED DENTAL COMPOSITE
In-Bog Lee (Seoul National University) Hyun-Jeong Kweon (Seoul National University) Jin-Young Kim (Seoul National University)
The polymerization shrinkage vectors of dental composite during photo-curing was investigated using a particle tracking method.
IN-SITU MICROFOCUS X-RAY MONITORING OF DAMAGE ACCUMULATION IN COMPOSITE BULKHEAD UNDER LOADING
Aleksandr Anoshkin (Perm National Research Polytechnic University) Valerii Zuiko (Perm National Research Polytechnic University) Vladimir Osokin (Perm National Research Polytechnic University) Pavel Pisarev (Perm National Research Polytechnic University)
In present work the qualitative and quantitative analysis of micro damages appearing at various loading conditions in bulkhead partition made of CFRP was done using the microfocus X-ray monitoring method.
USING ORIENTATIONS'S DETECTION TO COMPUTE ELASTIC PROPERTIES ON A COMPLEX TEXTURE OF 3D C/C COMPOSITE
Morgan Charron (LCTS) Guillaume Couegnat (University of Bordeaux) Olivier Caty (University of Bordeaux) A. Dekeyrel (Herakles (SAFRAN)) Gerard Vignoles (University of Bordeaux)
The purpose of this study is to estimate the effective elastic properties of a complex and tangled material, a 3D carbon/carbon composite with needle-stitched woven textile reinforcement, using orientation detection.
NON-DESTRUCTIVE DETERMINATION OF THE LOCAL FIBER VOLUME CONTENT IN FLAT AL(OH)3-FILLED SMC PARTS FROM X-RAY PROJECTIONS
Benjamin Bertram (Karlsruhe Institute of Technology) Pascal Pinter (Karlsruhe Institute of Technology) Kay Weidenmann (Karlsruhe Institute of Technology)
Support vector machines (SVM) can be employed to estimate the fiber volume content (FVC). For low errors below 1 Vol.-%, the SVM was trained using the same matrix composition and image aquisition geometry whereas FVCs and thicknesses were varied.
MONITORING OF THE MECHANICAL BEHAVIOR OF A COMPOSITE MATERIAL WITH HIGH PERFORMANCE BY FBG SENSORS
F. Bernardo (ENEA) Piero De Fazio (ENEA) Francesco Grandizio (ENEA) Massimiliano Grieco (ENEA) Giuseppe Montesano (ENEA)
This paper aims to verify the performance of a measuring deformation technique using optical fibers sensors (FBG) applied to fiber-reinforced concrete operating in a climate adverse environment, in particular the marine environment
HIGH TEMPERATURE MECHANICAL CHARACTERIZATION OF MICRO- AND MESO-INTERFACES IN A 3D CARBON-CARBON COMPOSITE
Adrien Gillard (Laboratoire des Composites Thermo-Structuraux (LCTS)) Guillaume Couegnat (University of Bordeaux) Stephane Jounnigot (University of Bordeaux) Olivier Caty (University of Bordeaux) Sylvain Chupin (CEA) Gerard Vignoles (University of Bordeaux)
Push-out tests were conducted on a 3D Carbon-Carbon composite to study the micro- and meso-interface fracture mechanisms. Monotonic and cycled push-out tests brought characteristic values such as strength, dissipated energy and friction.
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