Oxide Superconducting Wire Connecting Structure for Stress Distribution
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Solution Overview
Problem
The existing connecting structures for oxide superconducting wires suffer from stress concentration and bending issues when subjected to tensile loads, leading to destabilization of superconduction properties, especially when used in coil form.
Innovation Solution
A connecting structure is designed with a pair of oxide superconducting wires having a first surface-connecting superconducting wire and a second surface transit connector, where the second transit connector's tensile strength is higher than the first surface-connecting superconducting wire, and is configured to face the base material, reducing structural deviation and stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single surface-connecting superconducting wire is used to connect oxide superconducting wires, then the connecting structure is simple, but stress concentration and bending occur at the connecting portion under tensile load
Solution Approach 1:
The single surface-connecting superconducting wire is divided into two separate connecting wires: a first surface-connecting superconducting wire and a second surface-connecting superconducting wire. These wires are positioned at different surfaces (first surface and second surface) of the oxide superconducting wires, distributing the mechanical stress and preventing concentration at a single location. This segmentation resolves the contradiction by maintaining structural simplicity while improving reliability through stress distribution.
Solution Approach 2:
The connecting structure transitions from a single-plane connection to a multi-dimensional arrangement by positioning connecting wires at both the first surface and second surface of the oxide superconducting wires. This spatial distribution in the thickness direction reduces bending moments and stress concentration, thereby stabilizing superconduction properties under tensile load while maintaining reasonable structural complexity.
2Strength
If the tensile strength of the surface-connecting superconducting wire is increased to prevent damage, then damage resistance improves, but the wire becomes more rigid and prone to bending under load
Solution Approach 1:
The connecting function is segmented between two wires with different strength characteristics. The first surface-connecting superconducting wire has higher tensile strength to resist breaking, while the second surface-connecting superconducting wire has lower tensile strength and higher flexibility to accommodate bending. This segmentation allows each wire to optimize its mechanical properties for its specific role, preventing both damage and excessive bending.
Solution Approach 2:
Different tensile strength properties are assigned to different connecting wires based on their local requirements. The first connecting wire (with higher tensile strength) is positioned where breaking resistance is critical, while the second connecting wire (with lower tensile strength) is positioned where flexibility is needed. This local differentiation resolves the contradiction between strength and bending resistance.
3Strength
If a stronger base material is used to increase tensile strength, then the wire can withstand higher loads, but the superconduction property becomes more sensitive to tensile strength variations
Solution Approach 1:
The base material is designed with non-uniform tensile strength characteristics: stronger at the connecting portions to prevent damage during connection and under load, and weaker at the superconducting layer portions to reduce sensitivity to tensile strength variations. This local differentiation ensures that the superconduction property remains stable while the overall structure can withstand high loads.
Solution Approach 2:
The base material is functionally segmented into different regions with different mechanical properties: connection regions with high tensile strength for structural integrity, and superconducting regions with lower tensile strength to minimize stress on the superconducting layer. This segmentation allows the structure to handle high loads without making the superconduction property overly sensitive to tensile strength variations.
Data Source
AI summary
A connecting structure of an oxide superconducting wire includes a pair of oxide superconducting wires, tip surfaces of the pair of oxide superconducting wire being disposed to face to each other; a first surface-connecting superconducting wire configured to transit and connect the pair of oxide superconducting wires; and a second surface transit connector configured to transit and connect the pair of oxide superconducting wires, wherein tensile strength of joining sections between the second surface transit connector and the pair of oxide superconducting wires is higher than tensile strength of joining sections between the first surface-connecting superconducting wire and the pair of oxide superconducting wires.