Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 399, Issue 1, Pages 41-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2010.01.001
Keywords
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Funding
- Natural Science Foundation of China [10772049, 10672042]
- Research and Development Program of China [2009AA04Z408]
- Natural Science Foundation of Shanghai [06ZR14009]
- Pujiang Scholar Program
- Fudan University [08076]
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The three-dimensional constitutive relations are constructed, respectively, for the fuel particles, the metal matrix and the cladding of dispersion nuclear fuel elements, allowing for the effects of large deformation and thermal-elastoplasticity. According to the constitutive relations, the method of modeling their irradiation behaviors in ABAQUS is developed and validated. Numerical simulations of the interfacial performances between the fuel meat and the cladding are implemented with the developed finite element models for different micro-structures of the fuel meat. The research results indicate that: (1) the interfacial tensile stresses and shear stresses for some cases will increase with burnup, but the relative stresses will decrease with burnup for some micro-structures; (2) at the lower burnups, the interfacial stresses increase with the particle sizes and the particle volume fractions; however, it is not the case at the higher burnups; (3) the particle distribution characteristics distinctly affect the interfacial stresses, and the face-centered cubic case has the best interfacial performance of the three considered cases. (C) 2010 Elsevier B.V. All rights reserved.
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