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ROBUST FAILURE PREDICTION IN FIBER REINFORCED POLYMER RODS USING FREQUENCY ENTROPY OF CLUSTERED ACOUSTIC EMISSION EVENTS
Mohammadhadi Shateri (University of Manitoba) Maha Ghaib (University of Manitoba) Dagmar Svecova (University of Manitoba) Douglas Thomson (University of Manitoba)
A procedure based on the frequency entropy of clustered acoustic emission events is presented to determine when FRP rods are near the failure. Results show 40% and 60% of the ultimate load for GFRP and CFRP respectively, as exceeded service load.
CHARACTERIZATION OF INTERPHASES BY NANOMECHANICAL MAPPING AND CORRELATION WITH MACROSCOPIC MECHANICAL PROPERTIES
Lenaik Belec (University Toulon Var) Nicolas Spitz (University Toulon Var) Jean-François Chailan (University of Toulon)
The heterogeneity of the matrix in UD glass fibre/epoxy composites is shown by Atomic Force Microscopy with a quantitative nano-mechanical mode. The results are compared to static and dynamic mechanical tests.
FAILURE OF CARBON FIBER COMPOSITES WITH THERMOSET AND THERMOPLASTIC MATRIX INVESTIGATED BY IN-SITU MONITORING USING COMPUTED TOMOGRAPHY AND ACOUSTIC EMISSION
Sinan Kalafat (University of Augsburg) Markus Sause (University of Augsburg)
The investigated cases for thermoset and thermoplast based composites show fundamentally different behaviour of crack propagation. The CT images in combination with the acoustic emission provide an insight to the nature of both failure behaviours.
DETERMINATION OF ENVIRONMENTAL DEGRADATION OF MATRIX AND FIBRE MATERIALS WITH A NOVEL, STATISTICALLY RELIABLE MICRO-ROBOTIC APPROACH
Essi Sarlin (Tampere Univeristy of Technology) Mathias von Essen (Tampere Univeristy of Technology) Sarianna Palola (Tampere Univeristy of Technology) Mari Lingren (Tampere Univeristy of Technology) Pasi Kallio (Tampere Univeristy of Technology) Jyrki Vuorinen (Tampere Univeristy of Technology)
The environmental degradation of typical composite matrix and reinforcement materials is studied with a new micro-robotic approach and the results are compared against the results obtained by a traditional fibre tensile method.
BROADBAND DIELECTRIC SPECTROSCOPY OF DIELECTRIC-CONDUCTOR COMPOSITES: CHARACTERIZATION OF PHYSICAL PROPERTIES AND APPLICATION POTENTIAL
Viktor Bovtun (Czech Academy of Sciences) Jan Petzelt (Institute of Physics AS CR) Dmitry Nuzhnyy (Institute of Physics AS CR) Martin Kempa (Institute of Physics AS CR) Maxim Savinov (Institute of Physics AS CR)
Broadband dielectric spectra (1 mHz – 1 THz) of dielectric-conductor composites reveal essential information on their conductivity mechanisms, percolation phenomena, etc. and provide estimation of their potential for electromagnetic applications.
COMPOSITE TESTING 4.0 – A NEW APPROACH TOWARDS QUALITY ASSESSMENT USING COLLABORATIVE ROBOTICS AND MULTI SENSOR MEASUREMENT
Franz Eder (Descam 3D Technologies GmbH) M. Kling (Automation W+R) Frieder Heieck (University of Stuttgart) J. Greiner (University of Stuttgart) Andrea Miene (Faserinstitut Bremen) C. Cherrier (Automation W+R) R. Clasen (Automation W+R) Richard Söhnchen (Descam 3D Technologies GmbH)
Especially in the area of carbon composites, an increasing demand for a fast and easy to use quality inspection systems is obvious. We here present an unobstructed combination of collaborative robots with optical testing methods for CFRP parts.
COMBINING WAVE AND SPECTROSCOPIC TECHNIQUES TO MONITOR THE DEVELOPMENT OF THERMOSETS DURING CURE
John Puentes (University of Wisconsin-Madison) Lorenz Wruck (University of Wisconsin-Madison) Alexander Chaloupka (Fraunhofer ICT) Natalie Rudolph (University of Wisconsin-Madison) Tim Osswald (University of Wisconsin-Madison)
This work presents the first attempt to use ultrasonic sensors and a Raman spectrometer in a single testing set-up. The aim is to evaluate methods to infer thermo-chemical and mechanical properties of thermosets in one experiment.
EXPERIMENTAL DETERMINATION OF OUT OF PLANE ELASTIC SHEAR MODULUS BY THREE POINT BENDING TEST WITH VARYING SPAN: APPLICATION TO COMPOSITE LAMINATES AND PARTICLE WOOD PANELS
Andrea Bernasconi (Politecnico di Milano) Roberto Corradi (Politecnico di Milano) Riccardo Galeazzi (Politecnico di Milano)
Exploit the three point bending test and by optimization algorithms, it is possible to determine the elastic constants of the composite materials. In this work, we present the application of this method to particleboard panel considered as a sandwich
IN-SITU DETECTION OF PHASE TRANSITIONS OF SEMI-CRYSTALLINE CARBON FIBER REINFORCED THERMOPLASTICS USING DIELECTRIC ANALYSIS AND ITS CORRELATION TO DMA AND DSC
Alexander Chaloupka (Fraunhofer ICT) Dominik Grund (Fraunhofer ICT) André Wedel (Fraunhofer ICT) Natalie Rudolph (University of Wisconsin-Madison) Klaus Drechsler (Technical University of Munich / Institute for Carbon Composites)
A correlation of phase transitions of carbon fiber reinforced polyamide-6 determined by in-situ dielectric analysis, dynamic mechanical analysis and differential scanning calorimetry is done and a good agreement was found.
MODULES FOR AN EFFICIENT AND HOLISTIC APPLICATION OF NDT METHODS FOR FIBER REINFORCED POLYMERS
Christian Grosse (Technical University of Munich)
NDT techniques, their combination and numerical methods are modules that can be chosen to perform a measuring task. In the frame of holistic NDT a clear concept is required to organize the different modules in the best way.
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