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

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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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
Issue number2
Publication statusPublished - Jun 2007


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Three-directional FEM analyses of pre-bending effects for Nb3Sn composite wires'. Together they form a unique fingerprint.

Cite this