Three-directional FEM analyses of pre-bending effects for Nb3Sn composite wires

Satoru Murase, I. Okada, K. Kiyama, Nozomu Nanato, Seok Beom Kim, H. Oguro, G. Nishijima, S. Awaji, K. Watanabe, M. Wake

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Pre-bending effects of Nb3Sn composite wires, enhancement in Jc at the as-cooled condition and Jc peak, Jcm, against applied tensile strain, are well known in especially Cu-Nb reinforced Cu stabilized Nb3Sn wire. In an attempt to understand the effects, three directional strain analyses using FEM were studied by considering thermally-induced residual strain due to temperature difference between the reaction temperature and the cryogenic temperatures including the pre-bending process at room temperature for three types of Nb3Sn composite wires. To evaluate effects of change in three directional strain, the von Mises strain was introduced. As a result, the minimum von Mises strain against the applied tensile strain corresponded to Jcm ; low strain shows Jcm enhancement by the pre-bending for Cu-Nb reinforced Nb3Sn wire. It was found that there is a direct correlation between the minimum von Mises strain and Jcm related to the pre-bending.

Original languageEnglish
Pages (from-to)2676-2679
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume17
Issue number2
DOIs
Publication statusPublished - Jun 2007

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wire
Wire
Finite element method
composite materials
Composite materials
Tensile strain
augmentation
cryogenic temperature
temperature gradients
Temperature
Cryogenics
room temperature
temperature

Keywords

  • Composite superconductor
  • FEM
  • NbSn
  • Prebending
  • Three-directional strain

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Three-directional FEM analyses of pre-bending effects for Nb3Sn composite wires. / Murase, Satoru; Okada, I.; Kiyama, K.; Nanato, Nozomu; Kim, Seok Beom; Oguro, H.; Nishijima, G.; Awaji, S.; Watanabe, K.; Wake, M.

In: IEEE Transactions on Applied Superconductivity, Vol. 17, No. 2, 06.2007, p. 2676-2679.

Research output: Contribution to journalArticle

Murase, S, Okada, I, Kiyama, K, Nanato, N, Kim, SB, Oguro, H, Nishijima, G, Awaji, S, Watanabe, K & Wake, M 2007, 'Three-directional FEM analyses of pre-bending effects for Nb3Sn composite wires', IEEE Transactions on Applied Superconductivity, vol. 17, no. 2, pp. 2676-2679. https://doi.org/10.1109/TASC.2007.899597
Murase, Satoru ; Okada, I. ; Kiyama, K. ; Nanato, Nozomu ; Kim, Seok Beom ; Oguro, H. ; Nishijima, G. ; Awaji, S. ; Watanabe, K. ; Wake, M. / Three-directional FEM analyses of pre-bending effects for Nb3Sn composite wires. In: IEEE Transactions on Applied Superconductivity. 2007 ; Vol. 17, No. 2. pp. 2676-2679.
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