Yishan Chen , Xu Wang , Jiahao Wan , Huajun Liu , Fang Liu , Jinggang Qin , Chao Zhou , Huan Jin , Peng Gao
{"title":"硬质弯曲应变对REBCO带载流性能的影响","authors":"Yishan Chen , Xu Wang , Jiahao Wan , Huajun Liu , Fang Liu , Jinggang Qin , Chao Zhou , Huan Jin , Peng Gao","doi":"10.1016/j.cryogenics.2025.104191","DOIUrl":null,"url":null,"abstract":"<div><div><em>RE</em>BCO superconducting tapes possess high critical temperature, large engineering critical current density, and high critical magnetic field, making them essential for winding high-field magnets above 20 T. Layer-wound coils offer advantages such as fewer joints and reduced Joule heating but involve inevitable hard-way bending, which induces strain that degrades critical current and can cause irreversible damage at high strain levels. This study investigates the effect of hard-way bending radius on the current-carrying properties of <em>RE</em>BCO tapes with different structures. Critical current measurements were conducted in liquid nitrogen, combined with theoretical calculations and finite element simulations to characterize strain distribution. The simulation accuracy was verified by the distributed optical fiber technique. Results reveal a nonlinear relationship between strain and hard-way bending radius, with strain concentrated at the tape edges. At a hard-way bending radius of 200 mm, the critical current of copper-plated tape decreased to 20 %, multi-filament tape to 18 %, while stainless steel-encapsulated tape retained 70 % of its critical current. These findings provide a theoretical basis for optimizing layer-wound coil fabrication.</div></div>","PeriodicalId":10812,"journal":{"name":"Cryogenics","volume":"152 ","pages":"Article 104191"},"PeriodicalIF":2.1000,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of hard-way bending strain on the current-carrying properties of the REBCO tape\",\"authors\":\"Yishan Chen , Xu Wang , Jiahao Wan , Huajun Liu , Fang Liu , Jinggang Qin , Chao Zhou , Huan Jin , Peng Gao\",\"doi\":\"10.1016/j.cryogenics.2025.104191\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div><em>RE</em>BCO superconducting tapes possess high critical temperature, large engineering critical current density, and high critical magnetic field, making them essential for winding high-field magnets above 20 T. Layer-wound coils offer advantages such as fewer joints and reduced Joule heating but involve inevitable hard-way bending, which induces strain that degrades critical current and can cause irreversible damage at high strain levels. This study investigates the effect of hard-way bending radius on the current-carrying properties of <em>RE</em>BCO tapes with different structures. Critical current measurements were conducted in liquid nitrogen, combined with theoretical calculations and finite element simulations to characterize strain distribution. The simulation accuracy was verified by the distributed optical fiber technique. Results reveal a nonlinear relationship between strain and hard-way bending radius, with strain concentrated at the tape edges. At a hard-way bending radius of 200 mm, the critical current of copper-plated tape decreased to 20 %, multi-filament tape to 18 %, while stainless steel-encapsulated tape retained 70 % of its critical current. These findings provide a theoretical basis for optimizing layer-wound coil fabrication.</div></div>\",\"PeriodicalId\":10812,\"journal\":{\"name\":\"Cryogenics\",\"volume\":\"152 \",\"pages\":\"Article 104191\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cryogenics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0011227525001705\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cryogenics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0011227525001705","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
Effect of hard-way bending strain on the current-carrying properties of the REBCO tape
REBCO superconducting tapes possess high critical temperature, large engineering critical current density, and high critical magnetic field, making them essential for winding high-field magnets above 20 T. Layer-wound coils offer advantages such as fewer joints and reduced Joule heating but involve inevitable hard-way bending, which induces strain that degrades critical current and can cause irreversible damage at high strain levels. This study investigates the effect of hard-way bending radius on the current-carrying properties of REBCO tapes with different structures. Critical current measurements were conducted in liquid nitrogen, combined with theoretical calculations and finite element simulations to characterize strain distribution. The simulation accuracy was verified by the distributed optical fiber technique. Results reveal a nonlinear relationship between strain and hard-way bending radius, with strain concentrated at the tape edges. At a hard-way bending radius of 200 mm, the critical current of copper-plated tape decreased to 20 %, multi-filament tape to 18 %, while stainless steel-encapsulated tape retained 70 % of its critical current. These findings provide a theoretical basis for optimizing layer-wound coil fabrication.
期刊介绍:
Cryogenics is the world''s leading journal focusing on all aspects of cryoengineering and cryogenics. Papers published in Cryogenics cover a wide variety of subjects in low temperature engineering and research. Among the areas covered are:
- Applications of superconductivity: magnets, electronics, devices
- Superconductors and their properties
- Properties of materials: metals, alloys, composites, polymers, insulations
- New applications of cryogenic technology to processes, devices, machinery
- Refrigeration and liquefaction technology
- Thermodynamics
- Fluid properties and fluid mechanics
- Heat transfer
- Thermometry and measurement science
- Cryogenics in medicine
- Cryoelectronics