|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Finite Element Analysis of Micro-cantilever Beam Experiments in UO2
||Bowen Gong, David Frazer, Harn Chyi Lim, Shaffer Benjamin, Peter Hosemann, Pedro Peralta
|On-Site Speaker (Planned)
Understanding the influence of microstructure on thermo-mechanical behavior of oxide nuclear fuels is extremely important to predict their performance. Mechanical properties at the sub-grain length scale are key to build this understanding as well as multiscale models of fuel behavior. In this work, 3-D finite element models of micro-cantilever beams with pentagonal cross-section containing only a few grains were constructed to simulate micro-scale bending in uranium dioxide under both room and elevated temperatures. Correlations between load-deflection data, beam geometry, grain orientation and geometry, porosity, and anisotropic properties for UO2 are investigated using microstructural models. Microstructure reconstruction was conducted with images collected from 3-D serial sectioning using focused ion beam and electron backscattering diffraction. Results will be used to study the feasibility of deducing anisotropic mechanical properties, e.g., elastic stiffness tensor and critical resolved shear stresses, in UO2 using micro-scale bending experiments in multicrystalline micro-beams as compared to monocrystalline samples.
||Planned: A print-only volume