| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sol, Hugo
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (31/31 displayed)
- 2016The Ultrasonic Polar Scan for Composite Characterization and Damage Assessment: Past, Present and Futurecitations
- 2015Ultrasonic polar scan imaging of fatigued fiber reinforced composites
- 2015The quasi-harmonic ultrasonic polar scan for material characterization: Experiment and numerical modelingcitations
- 2015Calibration and correction procedure for quantitative out-of-plane shearographycitations
- 2015An ultrasonic strain gauge
- 2014Damage Signature of Fatigued Fabric Reinforced Plastics in the Pulsed Ultrasonic Polar Scan
- 2014Detection and Localization of Delaminations in Thin Carbon Fiber Reinforced Composites with the Ultrasonic Polar Scancitations
- 2014Detection and Localization of Delaminations in Thin Carbon Fiber Reinforced Composites with the Ultrasonic Polar Scan
- 2014A novel ultrasonic strain gauge for single-sided measurement of a local 3D strain field
- 2014A novel ultrasonic strain gauge for single-sided measurement of a local 3D strain fieldcitations
- 2014An Ultrasonic Strain Gauge
- 2014Pitfalls in the experimental recording of ultrasonic (backscatter) polar scans for material characterizationcitations
- 2014Extraction of bulk wave characteristics from a pulsed ultrasonic polar scancitations
- 2014Ultrasonic Characterizaion of Subsurface 2D Corrugationcitations
- 2014Identification of the elastic properties of isotropic and orthotropic thin-plate materials with the pulsed ultrasonic polar scan
- 2014Nondestructive damage assessment in fiber reinforced composites with the pulsed ultrasonic polar scancitations
- 2014The pulsed ultrasonic backscatter polar scan and its applications for NDT and material characterization
- 2014Errors in shearography measurements due to the creep of the PZT shearing actuatorcitations
- 2014Identification of the plastic behavior of aluminum plates under free air explosions using inverse methods and full-field measurements
- 2012'Gradient' polar scan technique for material characterizationcitations
- 2012Polar scan technique for material characterization and identification of new operating regimes
- 2010Reproducing the experimental pull-out and shear strength of clinched sheet metal connections using FEAcitations
- 2010Resonant-based identification of the Poisson's ratio of orthotropic materials
- 2010Determination of the flow stress and contact friction of sheet metal in a multi-layered upsetting test
- 2010Resonance Fatigue Testing of Test Beams Made of Composite Material
- 2009A reference specimen for permeability measurements of fibrous reinforcements for RTM
- 2008Identification of material parameters to predict Single Point Incremental Forming forcescitations
- 2007Experimental and theoretical study of the damage onset in biaxial cruciform specimens under static and hysteresis loading
- 2006Stereolithographic Specimen to Calibrate Permeability Measurements for RTM Flow Simulations
- 2004Study of nesting induced scatter of permeability values in layered reinforcement fabrics
- 2002New set-up for measurement of permeability properties of fibrous reinforcements for RTM
Places of action
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article
A reference specimen for permeability measurements of fibrous reinforcements for RTM
Abstract
The capability to simulate the flow of resin through a porous reinforcement by FE modelling has become very important for designing RTM production processes for high-performance composite parts. The key parameter in RTM flow simulations is the fibre reinforcement permeability. The measurement of this material parameter is still not standardized and many different set-ups have been proposed. Recently, a stereolithography technique was used to produce a textile-like solid specimen with anisotropic permeability, designed as a reference for calibration and comparison of permeability measurement set-ups and for validation of numerical permeability computation software. Unlike real textiles, the permeability properties of such reference specimens do not vary from test to test. Excellent repeatability of the experiments is achieved. When used for benchmarking, any discrepancy between different measurements on this specimen must be attributed to the set-up and data processing. <br/> <br/>This paper presents the first experimental measurements of the permeability of such reference specimens, obtained with a 2D central injection rig. The measured values, with principal components of the 2D permeability tensor of 2.47 ± 0.09 × 10^9 m2 and 5.44 ± 0.22 × 10^9 m2, are in good agreement with the values predicted using numerical permeability computation software. Statistics from a series of measurements using the same set-up show that the precision of the permeability identification depends on the data processing procedure. An approach which incorporates a numerical model that is also valid after the fluid reached an edge of the reinforcement performs significantly better than the approach, based on an analytical approximation, which was used before.