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Design and dimensioning of a test bench for investigating the relationship between critical temperature and axial mechanical stress of GdBaCuO tape conductors

Johannes Liebrich (Elektrotechnik, Helmut-Schmidt-Universitat Universitat der Bundeswehr Hamburg, Hamburg, Germany)
Christian Kreischer (Electrical Machines and Drive Systems, Helmut-Schmidt-Universitat Universitat der Bundeswehr Hamburg, Hamburg, Germany)

Abstract

Purpose

Superconductors offer several advantages compared with conventional conductors. However, it is not clear at this stage whether these types of conductors provide the same durability. For this reason, tape conductors under mechanical forces need to be studied in detail. The purpose of this paper is to investigate the relationship between critical temperature and axial mechanical stress of GdBaCuO tape conductors.

Design/methodology/approach

The paper investigates the influence of axial mechanical stresses on the critical temperature of superconductors. For these investigations, a multi-physical test rig was developed, which makes it possible to perform these types of investigations. With the presented measurement methodology, the influence of mechanical stresses on the tape conductor can be determined.

Findings

The investigations show a correlation between the critical temperature and the acting mechanical stresses. The analytically presented approach to describe the transition temperature is valid for the investigated samples. In addition, it is determined that the effects are not reversible, and therefore, permanent damage to the tape conductor is observed.

Originality/value

The presented investigations make it possible to create more accurate models of GdBaCuO tape conductors. This enables to extend the superconducting state space, which so far depends on three critical quantities, by the quantity of the axial stress.

Keywords

Citation

Liebrich, J. and Kreischer, C. (2023), "Design and dimensioning of a test bench for investigating the relationship between critical temperature and axial mechanical stress of GdBaCuO tape conductors", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/COMPEL-09-2022-0308

Publisher

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Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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