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
AbstractThe 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.
|Journal series||Fusion Engineering and Design, ISSN 0920-3796, (A 25 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Cryogenic magnet system, FE models, limit analysis, serration effect|
|ASJC Classification||; ; ;|
|Publication indicators||= 4; = 7; = 10.0; : 2011 = 1.786; : 2011 = 1.49 (2) - 2011=1.328 (5)|
|Citation count*||10 (2020-04-02)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.