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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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Mummery, Pm
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Delayed surface degradation in W-Ta alloys at 400°C under high-fluence 40 eV He plasma exposurecitations
- 2021High-dose ion irradiation damage in Fe28Ni28Mn26Cr18 characterised by TEM and depth-sensing nanoindentationcitations
- 2019Analysis of dynamic fracture and fragmentation of graphite bricks by combined XFEM and cohesive zone approachcitations
- 2019Configurational Entropy in Multicomponent Alloys: Matrix Formulation from Ab Initio Based Hamiltonian and Application to the FCC Cr-Fe-Mn-Ni Systemcitations
- 20173D dynamic fracture and fragmentation of AGR Graphite brick slices using XCZM
- 2017Short-Range Order in High Entropy Alloyscitations
- 2017Dynamic fracture analysis by explicit solid dynamics and implicit crack propagationcitations
- 2017Crack healing behaviour of Cr2AlC MAX phase studied by X-ray tomographycitations
- 2017The effects of ion irradiation on the micromechanical fracture strength and hardness of a self-passivating tungsten alloycitations
- 2017Micro X-ray Computed Tomography Image-based Two-scale Homogenisation of Ultra High Performance Fibre Reinforced Concretecitations
- 2016Fracture strength testing of a self-passivating tungsten alloy at the micrometre scalecitations
- 2016Investigating the effects of stress on the pore structures of nuclear grade graphitescitations
- 2016In situ observation of mechanical damage within a SiC-SiC ceramic matrix compositecitations
- 2013Observation and quantification of three-dimensional crack propagation in poly-granular graphitecitations
- 2012Gel-cast glass-ceramic tissue scaffolds of controlled architecture produced via stereolithography of mouldscitations
- 2009A finite element approach to the biomechanics of dromaeosaurid dinosaur claws
- 2008Investigating predictive capabilities of image-based modeling for woven composites in a scalable computing environment
- 2008Analysis of crack propagation in nuclear graphite using three-point bending of sandwiched specimenscitations
- 2008Nanoindentation of histological specimens using an extension of the Oliver and Pharr methodcitations
- 2005Full-field strain mapping by optical correlation of micrographs acquired during deformationcitations
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article
Investigating the effects of stress on the pore structures of nuclear grade graphites
Abstract
Graphite is used as a moderating material and as a structural component in a number of current generation nuclear reactors. During reactor operation stresses develop in the graphite components, causing them to deform. It is important to understand how the microstructure of graphite affects the material's response to these stresses.<br/><br/>A series of experiments were performed to investigate how the pore structures of Pile Grade A and Gilsocarbon graphites respond to loading stresses. A compression rig was used to simulate the build-up of operational stresses in graphite components, and a confocal laser microscope was used to study variation of a number of important pore properties. Values of elastic modulus and Poisson's ratio were calculated and compared to existing literature to confirm the validity of the experimental techniques.<br/><br/>Mean pore areas were observed to decrease linearly with increasing applied load, mean pore eccentricity increased linearly, and a small amount of clockwise pore rotation was observed. The response to build-up of stresses was dependent on the orientation of the pores and basal planes and the shapes of the pores with respect to the loading axis. It was proposed that pore closure and pore reorientation were competing processes. Pore separation was quantified using ‘nearest neighbour’ and Voronoi techniques, and non-pore regions were found to shrink linearly with increasing applied load.