State of the art of fuel micro-mechanical modelling: From atomic scale to engineering laws in fuel performance codes

Autor: Bruno Michel, Michael Welland, Nana Ofori-Opoku, Laurent Vanbrutzel, Katalin Kulacsy, Michael R. Tonks, Pierre-Guy Vincent, Fabienne Ribeiro, Andrei Jelea, Giovanni Pastore, David A. Anderson, Jean-marie Gatt, Ronan Madec, Jean-Paul Crocombette

Publikováno v: Journal of Nuclear Materials
Journal of Nuclear Materials, 2022, 572, pp.154034. ⟨10.1016/j.jnucmat.2022.154034⟩

International audience; This paper presents the state-of-the-art knowledge about the micro-mechanical modelling of the fuel behavior under irradiation with normal and off normal operating conditions. Modelling of fundamental processes can provide key

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2bf3726582578a200b4c85c6a2ef2b1
https://irsn.hal.science/irsn-03940475/document

Viscoplastic behavior of a porous polycrystal with similar pore and grain sizes: application to nuclear MOX fuel materials

Autor: Luc Portelette, Pierre-Guy Vincent, Hervé Moulinec, Mihail Garajeu

Publikováno v: International Journal of Solids and Structures
International Journal of Solids and Structures, Elsevier, 2021, 236-237, pp.111316. ⟨10.1016/j.ijsolstr.2021.111316⟩
International Journal of Solids and Structures, Elsevier, 2022, 236-237, pp.111316. ⟨10.1016/j.ijsolstr.2021.111316⟩
International Journal of Solids and Structures, 2021, 236-237, pp.111316. ⟨10.1016/j.ijsolstr.2021.111316⟩

International audience; This study deals with the viscoplastic behavior of a porous polycrystal with pores and grains of similar sizes. Such a microstructure can be encountered in irradiated nuclear Mixed OXide (MOX) fuel materials. MIcronized MASter

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6c9c6f5cf2cd26742f92e7f292338e3
https://hal.archives-ouvertes.fr/hal-03518058

Viscoplasticity of voided cubic crystals under hydrostatic loading

Autor: Martín I. Idiart, Louis Joëssel, Mihail Garajeu, Pierre-Guy Vincent

Publikováno v: International Journal of Solids and Structures
International Journal of Solids and Structures, Elsevier, 2018, 147, pp.156-165. ⟨10.1016/j.ijsolstr.2018.05.022⟩
International Journal of Solids and Structures, 2018, 147, pp.156-165. ⟨10.1016/j.ijsolstr.2018.05.022⟩

A micromechanical study of the viscoplasticity of voided cubic crystals is presented. The microscopic void distribution is isotropic and the macroscopic loading is hydrostatic. Three different approaches are considered. The first approach consists in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c03b8b841f9f1424903910f8ddeade5a
https://doi.org/10.1016/j.ijsolstr.2018.05.022

A micromechanical model for the secondary creep of elasto-viscoplastic porous materials with two rate-sensitivity exponents: Application to a mixed oxide fuel

Autor: Kajetan Wojtacki, Guylaine Boittin, Pierre Suquet, Pierre-Guy Vincent, Hervé Moulinec

Publikováno v: International Journal of Solids and Structures
International Journal of Solids and Structures, Elsevier, 2018, ⟨10.1016/j.ijsolstr.2018.12.026⟩
International Journal of Solids and Structures, Elsevier, 2020, 184, pp.99-113. ⟨10.1016/j.ijsolstr.2018.12.026⟩
International Journal of Solids and Structures, 2018, 184, pp.99-113. ⟨10.1016/j.ijsolstr.2018.12.026⟩

International audience; This study deals with the secondary creep of a porous nuclear fuel. This material is composed of an isotropic matrix, weakened by randomly distributed clusters of pores. The viscous strain in the matrix is described by two pow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c09c35a85f0b54904f12d6f23ece823
https://hal.archives-ouvertes.fr/hal-01997756/document

Numerical simulations and modeling of the effective plastic flow surface of a biporous material with pressurized intergranular bubbles: application to irradiated uranium dioxide

Autor: Guylaine Boittin, Pierre-Guy Vincent, Hervé Moulinec, Mihail Garajeu

Publikováno v: NuMat2016: The Nuclear Materials Conference
NuMat2016: The Nuclear Materials Conference, Nov 2016, Montpellier, France
HAL

International audience; In this work, the specific microstructure of the irradiated uranium dioxide (UO2) is modeled as a biporous material with 2 populations of bubbles: intragranular bubbles of spherical shape, and an intergranular population of bu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::3b5a1205b8ad4ac25c260841cf45a334
https://hal.archives-ouvertes.fr/hal-01409668