Plastic anisotropy and composite slip: Application to uranium dioxide

Slip systems and plastic shear anisotropy in Mg2SiO4 ringwoodite: insights from numerical modelling

Knowledge on the deformation mechanisms of Mg2SiO4 ringwoodite is important for the understanding of flow and seismic anisotropy in the Earth’s mantle transition zone. We report here the first numerical modelling of dislocation structures in ringwoodite. The dislocation properties are calculated through the Peierls-Nabarro model using the generalized stacking fault (GSF) results as a starting m...

construction and validation of translation metacognitive strategy questionnaire and its application to translation quality

like any other learning activity, translation is a problem solving activity which involves executing parallel cognitive processes. the ability to think about these higher processes, plan, organize, monitor and evaluate the most influential executive cognitive processes is what flavell (1975) called “metacognition” which encompasses raising awareness of mental processes as well as using effectiv...

Molten uranium dioxide structure and dynamics.

Uranium dioxide (UO2) is the major nuclear fuel component of fission power reactors. A key concern during severe accidents is the melting and leakage of radioactive UO2 as it corrodes through its zirconium cladding and steel containment. Yet, the very high temperatures (>3140 kelvin) and chemical reactivity of molten UO2 have prevented structural studies. In this work, we combine laser heating,...

Modeling of plastic anisotropy with reduced polycrystalline models. Application to aluminum alloys

Configurational analysis of uranium-doped thorium dioxide

While thorium dioxide is already used industrially in high temperature applications, more insight is needed about the behaviour of the material as part of a mixed-oxide (MOX) nuclear fuel, incorporating uranium. We have developed a new interatomic potential model, commensurate with a prominent existing UO2 potential, to conduct configurational analyses of uranium-doped ThO2 supercells. Using th...