A model of failure criteria based on the bifurcation theory for nuclear fuel element cladding

The bifurcation theory is applied to different portions of nuclear fuel element cladding in order to emphasize high localized deformation shear band, which corresponds to the onset of ductile rupture. Thus, critical strains are deduced for the increase of roughness amplitude as an initial imperfecti...

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Bibliographic Details
Published in:Nuclear engineering and design 1991-12, Vol.132 (2), p.133-142
Main Authors: Mehedinteanu, S., Deaconu, L., Chirlesan, D.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Installations for energy generation and conversion: thermal and electrical energy
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Summary:The bifurcation theory is applied to different portions of nuclear fuel element cladding in order to emphasize high localized deformation shear band, which corresponds to the onset of ductile rupture. Thus, critical strains are deduced for the increase of roughness amplitude as an initial imperfection on the cladding internal surface. The simulation of the effect of the irradiation and iodine by means of a special constitutive model gives the critical conditions for the onset of failure. Numerical examples prove the consistency of the criteria.
ISSN:0029-5493
1872-759X
DOI:10.1016/0029-5493(91)90261-F