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Effects of Transverse Stress on the Current Carrying Capacity of Multifilamentary Wires

Boschman, H. / Klundert, L. J. M.

Abstract The influence of transverse compressive stress on the current carrying capacity of multifilamentary Nb3Sn wires has been investigated on three short samples with a copper, bronze and mixed matrix. A 10 % current reduction has been observed at stresses ranging from 50 to 100 MPa for the three wires. In the test arrangement both applied force and deformation of the wires have been determined during the experiments. It has been found, that the critical current degradation can be described more unambiguously as a function of the deformation of the wire than as a function of applied load. This is caused by hysteresis effects in the stress-strain relation of the matrix material. There are indications that the length over which a compressive stress is applied is important for the observed current reduction. It has been found that degradation effects are more severe when small compression lengths are used.

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Effects of Transverse Stress on the Current Carrying Capacity of Multifilamentary Wires

Boschman, H. / Klundert, L. J. M.

Abstract The influence of transverse compressive stress on the current carrying capacity of multifilamentary Nb3Sn wires has been investigated on three short samples with a copper, bronze and mixed matrix. A 10 % current reduction has been observed at stresses ranging from 50 to 100 MPa for the three wires. In the test arrangement both applied force and deformation of the wires have been determined during the experiments. It has been found, that the critical current degradation can be described more unambiguously as a function of the deformation of the wire than as a function of applied load. This is caused by hysteresis effects in the stress-strain relation of the matrix material. There are indications that the length over which a compressive stress is applied is important for the observed current reduction. It has been found that degradation effects are more severe when small compression lengths are used.

Effects of Transverse Stress on the Current Carrying Capacity of Multifilamentary Wires

Boschman, H. / Klundert, L. J. M.

Abstract The influence of transverse compressive stress on the current carrying capacity of multifilamentary Nb3Sn wires has been investigated on three short samples with a copper, bronze and mixed matrix. A 10 % current reduction has been observed at stresses ranging from 50 to 100 MPa for the three wires. In the test arrangement both applied force and deformation of the wires have been determined during the experiments. It has been found, that the critical current degradation can be described more unambiguously as a function of the deformation of the wire than as a function of applied load. This is caused by hysteresis effects in the stress-strain relation of the matrix material. There are indications that the length over which a compressive stress is applied is important for the observed current reduction. It has been found that degradation effects are more severe when small compression lengths are used.

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Title:

Effects of Transverse Stress on the Current Carrying Capacity of Multifilamentary Wires

Contributors:

Boschman, H. (author) / Klundert, L. J. M. (author)

Published in:

Advances in Cryogenic Engineering Materials ; 93-100

An International Cryogenic Materials Conference Publication ; 36

Publication date:

1990-01-01

Size:

8 pages

ISBN:

978-1-4613-9882-0 , 978-1-4613-9880-6

ISSN:

DOI:

https://doi.org/10.1007/978-1-4613-9880-6_12

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Critical Current , Current Reduction , Transverse Stress , Round Wire , Twist Pitch Chemistry , Biochemical Engineering , Characterization and Evaluation of Materials , Mechanical Engineering

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