Multiscale analysis of the influence of the triplet helicoidal geometry on the strain state of a Nb3Sn based strand for ITER coils

被引：30

作者：

Boso, DP

Lefik, M

Schrefler, BA

机构：

[1] Univ Padua, Dept Struct & Transportat Engn, I-35131 Padua, Italy

[2] Tech Univ Lodz, Chair Geotech Engn & Engn Struct, PL-93590 Lodz, Poland

来源：

CRYOGENICS | 2005年 / 45卷 / 09期

关键词：

Nb3Sn based strand; filament strain; superconducting cable; composite materials; multilevel homogenisation; beam theory; finite element method;

D O I：

10.1016/j.cryogenics.2005.06.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A theoretical model of a beam of unidirectional composites-based on the homogenisation theory and a refined kinematical hypothesis-is used for the analysis of the influence of the helicoidal geometry of a superconducting strand triplet on its strain state. The triplet is the first cabling stage of the superconducting cables used to wind the coils of ITER fusion reactor. The multiscale modelling strategy is presented, for which a finite element code has been developed. A triplet of Nb3Sn based strands subjected to an axial stretch is analysed, and the resulting complete 3D strain state in the Nb3Sn filament is recovered. An "extra" strain is found due to the helicoidal geometry of the triplet. Discussion of the results concludes the paper. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：589 / 605

页数：17

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