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AbstractAbstract
[en] Zirconium alloy sheet and clad are strongly textured materials, resulting in sharp anisotropic mechanical behavior. The purpose of this work is to characterize and model the anisotropic behavior of recrystallized Zircaloy-alloy sheets. Anisotropy is investigated by usual mechanical tests (tensile and shear loadings) performed on sheet material using digital image correlation measurements. A model is identified from this experimental database obtained on sheet material. Finite element simulations of tensile notched tests are used to validate the law. Then, the model transferability from the sheet to the rod is studied. The transferability is suitable for uniaxial loading. On the contrary, the transferability is not fully adequate for biaxial loadings. Therefore, a new identification of parameters dealing with anisotropy from enriched database with an equibiaxial rod test is necessary. (author)
[fr]
La texture marquee des toles et des gaines en alliages de zirconium se traduit par une forte anisotropie du comportement mecanique. L'objectif de l'etude est de caracteriser et de modeliser le comportement anisotrope de toles en alliage de Zircaloy-4 recristallise. La caracterisation de l'anisotropie du comportement est realisee au travers d'essais mecaniques conventionnels (chargements en traction et en cisaillement) sur toles en utilisant la methode de correlation d'images numeriques. Dans un premier temps, un modele a ete identifie a partir de cette base experimentale sur tole. La loi est validee par des calculs elements finis d'essais de traction sur eprouvettes plates entaillees. Dans un second temps, la transferabilite du modele de la tole vers le tube a ete etudiee. Pour les chargements uniaxies, la transferabilite est averee. En revanche, pour les chargements biaxies la transferabilite est moins bonne. Une reidentification des parametres gerant l'anisotropie du comportement en integrant a la base d'identification un essai equibiaxie sur tube a ete necessaire.Original Title
Comportement du Zircaloy-4 recristallise: identification du comportement anisotrope pour application a la situation d'accident de reactivite
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Secondary Subject
Source
22 Sep 2015; 321 p; 143 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; Sciences et Genie des Materiaux
Record Type
Report
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ALLOYS, ALLOY-ZR98SN-4, CALCULATION METHODS, CHROMIUM ADDITIONS, CHROMIUM ALLOYS, CORROSION RESISTANT ALLOYS, FAILURES, HARDENING, HEAT RESISTANT MATERIALS, HEAT RESISTING ALLOYS, IRON ADDITIONS, IRON ALLOYS, MATERIALS, MATHEMATICAL SOLUTIONS, MECHANICAL PROPERTIES, NUMERICAL SOLUTION, SIMULATION, TIN ALLOYS, TRANSITION ELEMENT ALLOYS, ZIRCALOY, ZIRCONIUM ALLOYS, ZIRCONIUM BASE ALLOYS
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