Three-Directional FEM Analyses of Pre-Bending Effects for ${\rm Nb}_{3}{\rm Sn}$ Composite Wires
| Autor: | I. Okada, Hidetoshi Oguro, N. Nanato, M. Wake, SeokBeom Kim, Gen Nishijima, Satoru Murase, Satoshi Awaji, K. Watanabe, K. Kiyama |
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| Rok vydání: | 2007 |
| Předmět: |
FEM
three-directional strain Materials science Strain (chemistry) Composite number Niobium chemistry.chemical_element prebending Superconducting magnet Bending Condensed Matter Physics Copper Finite element method Electronic Optical and Magnetic Materials Composite superconductor chemistry Nb3Sn von Mises yield criterion Electrical and Electronic Engineering Composite material |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 17:2676-2679 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/tasc.2007.899597 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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