DocumentCode :
1445570
Title :
Computation of Strain State in a {\\rm Nb}_{3}{\\rm Sn} Strand Using Nonlinear Hierarchical Models
Author :
Collins, B. ; Krishnan, J. ; Arbelaez, D. ; Ferracin, P. ; Dietderich, D.R. ; Zohdi, T.I.
Author_Institution :
Lawerence Berkeley Nat. Lab., Berkeley, CA, USA
Volume :
22
Issue :
3
fYear :
2012
fDate :
6/1/2012 12:00:00 AM
Firstpage :
4905104
Lastpage :
4905104
Abstract :
The large range of length scales present within accelerator magnets suggests the incorporation of a hierarchical structure into computational models. Evaluation of the strain state present within the superconducting filaments is necessary in order to determine the critical current of Nb3Sn based magnets. As part of an ongoing investigation at LBNL, a three-dimensional nonlinear multiscale model is developed to investigate the behavior of Nb3Sn strands. The strain state in the superconducting filaments is examined by simulating a cool down from reaction to 4.2 K. The effects of strand geometry on the final strain state are also explored. The validity of the model is tested through the comparison of the predicted moduli to experimental tangent measurements.
Keywords :
accelerator magnets; niobium alloys; superconducting magnets; superconducting materials; tin alloys; Nb3Sn; accelerator magnet; computational model; experimental tangent measurement; hierarchical structure; nonlinear hierarchical model; strain state; superconducting filament; temperature 4.2 K; three-dimensional nonlinear multiscale model; Computational modeling; Copper; Niobium-tin; Strain; Stress; Superconducting magnets; ${rm Nb}_{3}{rm Sn}$; Elasto-plastic; RRP; multiscale modeling; superconducting magnets;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2012.2185030
Filename :
6151051
Link To Document :
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