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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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Wang, Yong
University of Manchester
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2023Transforming CeO2 nanoparticles into ultra small ceria clusters on alumina enhances catalytic activitycitations
- 2023Exploration of Waste Glass Powder as Partial Replacement of Cement in Concretecitations
- 2022Modern cladding systems for big sheds: The emerging state of the artcitations
- 2021Stressed skin theory and structure cladding interaction: Safety concerns with Big Shedscitations
- 2021Numerical analysis of a clad portal frame structure tested to destructioncitations
- 2020Multiscale image-based modelling of damage and fracture in carbon fibre reinforced polymer compositescitations
- 2019Quantification of gas permeability of epoxy resin composites with graphene nanoplateletscitations
- 2016Modelling punching shear failure using XFEM
- 2016Crack Propagation for Concrete Flat Plates Using XFEM Methodcitations
- 2016Elevated temperature behaviour and fire resistance of cast iron columnscitations
- 2016Moment capacity of cast iron beams in jack arched construction exposed to firecitations
- 2016Generation of Micro-scale Finite Element Models from Synchrotron X-ray CT Images for Multidirectional Carbon Fibre Reinforced Compositescitations
- 2015An Experimental Investigation of Mechanical Properties of Structural Cast Iron at Elevated Temperatures and after Cooling Downcitations
- 2015Tuning the structure and preferred orientation in reactively sputtered copper oxide thin filmscitations
- 2014Modeling of insulation in 19th century metal framed structures
- 2014Transmittance enhancement and optical band gap widening of Cu2O thin films after air annealingcitations
- 2014Controlling the preferred orientation in sputter-deposited Cu2O thin films: Influence of the initial growth stage and homoepitaxial growth mechanismcitations
- 2014Fire Resistance of 19th Century Fireproof Flooring Systems: a Sensitivity Analysiscitations
- 2013Thermal and mechanical properties of 19th century fireproof flooring systems at elevated temperaturescitations
- 2007Engineered SMR catalysts based on hydrothermally stable, porous, ceramic supports for microchannel reactorscitations
- 2005Catalytic Preparation of Pyrrolidones from Renewable Resources
Places of action
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article
Quantification of gas permeability of epoxy resin composites with graphene nanoplatelets
Abstract
This paper presents the development and validation of a numerical simulation method using the Lattice Boltzmann Method (LBM) to predict the permeability of epoxy resin (ER) composites with graphene nanoplatelets (GNPs).<br/>Gas permeability tests were carried out for a series of GNP/ER nanocomposites with different loadings and diameters of GNPs. The experimental results confirm that inclusion of GNPs in ER significantly decreased the effective gas permeability, with the highest reduction of 66% when the GNP loading was 3 wt%. The effects of using different diameters of GNPs show that using GNPs of 25 µm in diameter achieved less reduction in gas permeability than using GNPs of smaller diameters of 5 and 15 µm at the same loading of 1 wt%. This unexpected result has now been explained by the developed numerical model.<br/>The microstructures of GNPs filled ER composites were numerically reconstructed for the relative gas permeability prediction model using LBM. The 3D X-ray CT scan images clearly show agglomeration of GNPs, in particular when the diameter of GNPs is large (25 µm), due to strong Van der Waals forces. An agglomeration sub-model was thus incorporated when numerically constructing the microstructure of GNPs filled ER composites. Agglomeration of GNPs results in the formation of a small number of super-thick GNPs, leaving large spaces as ER-rich area without any GNP. This led the GNPs filled ER with 25 µm of GNP diameter to obtain a lower reduction in gas permeability than smaller GNPs filled ER. <br/>The results of numerical sensitivity studies on surface area, rotation, curling and folding of GNP flakes suggest that it is acceptable to use flat disk shaped flakes to represent amorphous GNPs with small degrees of deformation (less than 20o and 1.5 for folding angle and curling rate respectively). The results also show that the projection area perpendicular to the overall gas flow direction dominates the overall gas barrier effect of GNPs. The feasibility of using 2D models is demonstrated and it is acceptable to assume that the GNPs in the prepared samples are uniformly sized with a diameter equal to the nominal diameter. <br/>This numerical simulation model significantly improves the accuracy for prediction of reduction in gas permeability, over that of existing analytical models, when compared against the authors’ experimental results and experimental data from literature.