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FP7

Damage of actively cooled plasma facing components of magnetic confinement controlled fusion machines

Funded under: FP7-EURATOM

Abstract

Plasma facing components (PFCs) of magnetic fusion machines have high manufactured residual stresses and have to withstand important stress ranges during operation. These actively cooled PFCs have a carbon fibre composite (CFC) armour and a copper alloy heat sink. Cracks mainly appear in the CFC near the composite/copper interface. In order to analyse damage mechanisms, it is important to well simulate the damage mechanisms both of the CFC and the CFC/Cu interface. This study focuses on the mechanical behaviour of the N11 material for which the scalar ONERA damage model was used. The damage parameters of this model were identified by similarity to a neighbour material, which was extensively analysed, according to the few characterization test results available for the N11. The finite elements calculations predict a high level of damage of the CFC at the interface zone explaining the encountered difficulties in the PFCs fabrication. These results suggest that the damage state of the CFC cells is correlated with a conductivity decrease to explain the temperature increase of the armour surface under fatigue heat load.

Additional information

Authors: CHEVET G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SCHLOSSER J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);MARTIN E, Université Bordeaux 1, Pessac (FR);HERB V, Université Bordeaux 1, Pessac (FR);CAMUS G, Université Bordeaux 1, Pessac (FR)
Bibliographic Reference: An oral paper given at: E-MRS 2008 Spring Meeting Organised by: European Science Foundation Held at: Congress Center, Strasbourg (FR)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.jnucmat.2008.11.031
Record Number: 200910307 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en