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Fracture of functionally graded materials: application to hydrided zircaloy; Fissuration des materiaux a gradient de proprietes: application au zircaloy hydrure

Abstract

This thesis is devoted to the dynamic fracture of functionally graded materials. More particularly, it deals with the toughness of nuclear cladding at high burnup submitted to transient loading. The fracture is studied at local scale using cohesive zone model in a multi body approach. Cohesive zone models include frictional contact to take into account mixed mode fracture. Non smooth dynamics problems are treated within the Non-Smooth Contact Dynamics framework. A multi scale study is necessary because of the dimension of the clad. At microscopic scale, the effective properties of surface law, between each body, are obtained by periodic numerical homogenization. A two fields Finite Element formulation is so written. An extended formulation of the NSCD framework is obtained. The associated software allows to simulate, in finite deformation, from the crack initiation to post-fracture behavior in heterogeneous materials. At microscopic scale, random RVE calculations are made to determine effective properties. At macroscopic scale, calculations of part of clad are made to determine the role of the mean hydrogen concentration and gradient of hydrogen parameters in the toughness of the clad under dynamic loading. (author)
Authors:
Publication Date:
Dec 15, 2005
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6900
Resource Relation:
Other Information: TH: These discipline: mecanique, genie mecanique et genie civil. Formation doctorale: mecanique des materiaux et des milieux complexes, des structures et systemes. Ecole doctorale: informations, structures, systemes; Also available from Bibliotheque Universitaire Sciences, Place Eugene Bataillon, 34090 - Montpellier (France)
Subject:
36 MATERIALS SCIENCE; ACCIDENTS; COMPUTERIZED SIMULATION; CRACKS; FRACTURE PROPERTIES; FRACTURES; MICROSTRUCTURE; ZIRCALOY
OSTI ID:
20972273
Research Organizations:
Montpellier-2 Univ. Sciences et Techniques du Languedoc, Lab. de Mecanique et Genie Civil, 34 (France); Institut de Radioprotection et de Surete Nucleaire (IRSN), Lab. Lab. d'Etude du Combustible, 13 - Saint Paul Lez Durance (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0605171001654
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
268 pages
Announcement Date:
Jan 17, 2008

Citation Formats

Perales, F. Fracture of functionally graded materials: application to hydrided zircaloy; Fissuration des materiaux a gradient de proprietes: application au zircaloy hydrure. France: N. p., 2005. Web.
Perales, F. Fracture of functionally graded materials: application to hydrided zircaloy; Fissuration des materiaux a gradient de proprietes: application au zircaloy hydrure. France.
Perales, F. 2005. "Fracture of functionally graded materials: application to hydrided zircaloy; Fissuration des materiaux a gradient de proprietes: application au zircaloy hydrure." France.
@misc{etde_20972273,
title = {Fracture of functionally graded materials: application to hydrided zircaloy; Fissuration des materiaux a gradient de proprietes: application au zircaloy hydrure}
author = {Perales, F}
abstractNote = {This thesis is devoted to the dynamic fracture of functionally graded materials. More particularly, it deals with the toughness of nuclear cladding at high burnup submitted to transient loading. The fracture is studied at local scale using cohesive zone model in a multi body approach. Cohesive zone models include frictional contact to take into account mixed mode fracture. Non smooth dynamics problems are treated within the Non-Smooth Contact Dynamics framework. A multi scale study is necessary because of the dimension of the clad. At microscopic scale, the effective properties of surface law, between each body, are obtained by periodic numerical homogenization. A two fields Finite Element formulation is so written. An extended formulation of the NSCD framework is obtained. The associated software allows to simulate, in finite deformation, from the crack initiation to post-fracture behavior in heterogeneous materials. At microscopic scale, random RVE calculations are made to determine effective properties. At macroscopic scale, calculations of part of clad are made to determine the role of the mean hydrogen concentration and gradient of hydrogen parameters in the toughness of the clad under dynamic loading. (author)}
place = {France}
year = {2005}
month = {Dec}
}