Limit analysis of W7-X critical magnet system components with consideration of material serration effect

Łukasz Ciupiński , Grzegorz Krzesiński , Piotr Marek , Tomasz Zagrajek , V. Bykov , A. Dudek , F. Schauer , A. Panin


The paper reports on finite element (FE) method analyses aiming at the determination of the static load bearing capacity of critical components in the support structure of superconducting coils of Wendelstein 7-X (W7-X). These components are made of austenitic stainless steel that at 4K is known to exhibit instable plastic flow – the so-called serration effect, i.e. a scattering of the stress under increasing strain. This material behavior may significantly reduce the load bearing capacity of the components. The developed modeling approach uses a special procedure to simulate the serration effect in a conservative way. The expected reduction of the material properties due to the welding process is also taken into account. It is demonstrated that the models are capable to determine the limit loads for the critical components in a flexible and efficient way.
Author Łukasz Ciupiński (FMSE / DMD)
Łukasz Ciupiński,,
- Division of Materials Design
, Grzegorz Krzesiński (FPAE / IAAM)
Grzegorz Krzesiński,,
- The Institute of Aeronautics and Applied Mechanics
, Piotr Marek (FPAE / IAAM)
Piotr Marek,,
- The Institute of Aeronautics and Applied Mechanics
, Tomasz Zagrajek (FPAE / IAAM)
Tomasz Zagrajek,,
- The Institute of Aeronautics and Applied Mechanics
, V. Bykov - [Max Planck Institut für Plasmaphysik]
V. Bykov,,
, A. Dudek - [Max Planck Institut für Plasmaphysik]
A. Dudek,,
, F. Schauer - [Max Planck Institut für Plasmaphysik]
F. Schauer,,
, A. Panin - [Forschungszentrum Jülich (FZJ)]
A. Panin,,
Journal seriesFusion Engineering and Design, ISSN 0920-3796, (A 25 pkt)
Issue year2011
Publication size in sheets0.5
Keywords in EnglishCryogenic magnet system, FE models, limit analysis, serration effect
ASJC Classification2210 Mechanical Engineering; 2500 General Materials Science; 2104 Nuclear Energy and Engineering; 2205 Civil and Structural Engineering
Languageen angielski
Score (nominal)25
Score sourcejournalList
Publication indicators WoS Citations = 4; Scopus Citations = 7; GS Citations = 10.0; Scopus SNIP (Source Normalised Impact per Paper): 2011 = 1.786; WoS Impact Factor: 2011 = 1.49 (2) - 2011=1.328 (5)
Citation count*10 (2020-04-02)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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