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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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| Ali, M. A. |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Heikinheimo, Janne
VTT Technical Research Centre of Finland
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023Micromechanical modeling of single crystal and polycrystalline UO2 at elevated temperaturescitations
- 2023Micromechanical modeling of single crystal and polycrystalline UO 2 at elevated temperaturescitations
- 2020Segregation of Ni at early stages of radiation damage in NiCoFeCr solid solution alloyscitations
- 2017Applications of positron annihilation spectroscopy in nuclear materials research ; Positroniannihilaatiospektroskopian sovelluksia ydinmateriaalitutkimuksessa
- 2017Applications of positron annihilation spectroscopy in nuclear materials research:Dissertation
- 2017Applications of positron annihilation spectroscopy in nuclear materials research
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article
Micromechanical modeling of single crystal and polycrystalline UO2 at elevated temperatures
Abstract
Modelling of UO2 mechanical behavior requires detailed knowledge of the local stresses and strains during the fuel’s operation in normal and accident conditions. Therefore, a crystal plasticity formulation is proposed for polycrystalline UO. The model contains a dislocation-density-based formulation including three slip families and their interactions. The model is parametrized with single crystal and polycrystal experimental data using an optimization scheme. The model’s capability to represent yield point, strain hardening behavior, temperature and strain rate dependencies are evaluated. Finally, different approaches to include porosity at the polycrystal are analyzed to assess the effect of porosity on homogenized macroscopic stress-strain behavior, and stress/strain localization at the grain level.