Finite-element analysis of transverse compressive and thermal loads on Nb3Sn wires with voids
Abstract
High-field superconducting magnets play a very important role in many large-scale physics experiments, particularly particle colliders and fusion confinement devices such as Large Hadron Collider (LHC) and International Thermonuclear Experimental Reactor (ITER). The two most common superconductors used in these applications are NbTi and Nb3Sn. Nb3Sn wires are favored because of their significantly higher Jc (critical current density) for higher field applications. The main disadvantage of Nb3Sn is that the superconducting performance of the wire is highly strain sensitive and it is very brittle. This strain sensitivity is strongly influenced by two factors: plasticity and cracked filaments. Cracks are induced by large stress concentrators that can be traced to the presence of voids in the wire. We develop detailed 2-D and 3-D finite-element models containing wire filaments and different possible distributions of voids in a bronze-route Nb3Sn wire. We apply compressive transverse loads for various cases of void distributions to simulate the stress and strain response of a Nb3Sn wire under the Lorentz force. Furthermore, this paper improves our understanding of the effect voids have on the Nb3Sn wire's mechanical properties, and in so, the connection between the distribution of voids and performance degradation such as the correlation between irreversiblemore »
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Univ. of California, Santa Cruz, CA (United States). Dept. of Physics
- Univ. of Geneva (Switzerland) Dept Quantum Matter Phys; Univ. of Geneva (Switzerland) Dept Appl Phys
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1256389
- Report Number(s):
- PPPL-5207
Journal ID: ISSN 1051-8223
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- IEEE Transactions on Applied Superconductivity
- Additional Journal Information:
- Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1051-8223
- Publisher:
- Institute of Electrical and Electronics Engineers (IEEE)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; finite-element analysis; fusion magnet; stress concentration; Nb3Sn; superconducting wires
Citation Formats
Zhai, Y., D'Hauthuille, L., Barth, C., and Senatore, C. Finite-element analysis of transverse compressive and thermal loads on Nb3Sn wires with voids. United States: N. p., 2016.
Web. doi:10.1109/tasc.2016.2535784.
Zhai, Y., D'Hauthuille, L., Barth, C., & Senatore, C. Finite-element analysis of transverse compressive and thermal loads on Nb3Sn wires with voids. United States. https://doi.org/10.1109/tasc.2016.2535784
Zhai, Y., D'Hauthuille, L., Barth, C., and Senatore, C. Mon .
"Finite-element analysis of transverse compressive and thermal loads on Nb3Sn wires with voids". United States. https://doi.org/10.1109/tasc.2016.2535784. https://www.osti.gov/servlets/purl/1256389.
@article{osti_1256389,
title = {Finite-element analysis of transverse compressive and thermal loads on Nb3Sn wires with voids},
author = {Zhai, Y. and D'Hauthuille, L. and Barth, C. and Senatore, C.},
abstractNote = {High-field superconducting magnets play a very important role in many large-scale physics experiments, particularly particle colliders and fusion confinement devices such as Large Hadron Collider (LHC) and International Thermonuclear Experimental Reactor (ITER). The two most common superconductors used in these applications are NbTi and Nb3Sn. Nb3Sn wires are favored because of their significantly higher Jc (critical current density) for higher field applications. The main disadvantage of Nb3Sn is that the superconducting performance of the wire is highly strain sensitive and it is very brittle. This strain sensitivity is strongly influenced by two factors: plasticity and cracked filaments. Cracks are induced by large stress concentrators that can be traced to the presence of voids in the wire. We develop detailed 2-D and 3-D finite-element models containing wire filaments and different possible distributions of voids in a bronze-route Nb3Sn wire. We apply compressive transverse loads for various cases of void distributions to simulate the stress and strain response of a Nb3Sn wire under the Lorentz force. Furthermore, this paper improves our understanding of the effect voids have on the Nb3Sn wire's mechanical properties, and in so, the connection between the distribution of voids and performance degradation such as the correlation between irreversible strain limit and the void-induced local stress concentrations.},
doi = {10.1109/tasc.2016.2535784},
journal = {IEEE Transactions on Applied Superconductivity},
number = 4,
volume = 26,
place = {United States},
year = {Mon Feb 29 00:00:00 EST 2016},
month = {Mon Feb 29 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Quantitative correlation between the void morphology of niobium-tin wires and their irreversible critical current degradation upon mechanical loading
journal, April 2018
- Barth, C.; Seeber, B.; Rack, A.
- Scientific Reports, Vol. 8, Issue 1
Influence of transverse stress exerted at room temperature on the superconducting properties of Nb 3 Sn wires
journal, August 2019
- Ebermann, P.; Baumgartner, T.; Behnsen, J.
- Superconductor Science and Technology, Vol. 32, Issue 9