Earticle

초록

영어

In superconducting coil applications particularly in wet wound coils, coated conductor (CC) tapes are subjected to different type of stresses. These include hoop stress acting along the length of the CC tape and the Lorentz force acting perpendicular to the CC tape’s surface. Since the latter is commonly associated with delamination problem of multi- layered CC tapes, more understanding and attention on the delamination phenomena induced in the case of coil applications are needed. Difference on the coefficient of thermal expansion (CTE) of each constituent layer of the CC tape, the bobbin, and the impregnating materials is the main causes of delamination in CC tapes when subjected to thermal cycling. The CC tape might also experience cyclic loading due to the energizing scheme (on - off) during operation. In the design of degradation-free superconducting coils, therefore, characterization of the delamination behaviors including mechanism and strength in REBCO CC tapes becomes critical. In this study, transverse tensile tests were conducted under different loading conditions using different size of upper anvils on the GdBCO CC tapes. The mechanical and electromechanical delamination strength behaviors of the CC tapes under transverse tensile loading were examined and a two-parameter Weibull distribution analysis was conducted in statistical aspects. As a result, the CC tape showed similar range of mechanical delamination strength regardless of cross-head speed adopted. On the other hand, cyclic loading might have affected the CC tape in both upper anvil sizes adopted.

목차

Abstract
 1. INTRODUCTION
 2. EXPERIMENTAL PROCEDURES
  2.1. Samples
  2.2. Transverse tension test
 3. RESULTS AND DISCUSSION
  3.1. Mechanical delamination strength
  3.2. Ic behavior under monotonic and cyclic transverse tensile loading
 4. SUMMARY
 ACKNOWLEDGMENT
 REFERENCES

키워드

저자

• Alking B. Gorospe [ Department of Mechanical Design Engineering, Andong National University, Andong 760-749 Korea, Aurora State College of Technology, Baler, Philippines ]
• Zhierwinjay M. Bautista [ Department of Mechanical Design Engineering, Andong National University, Andong 760-749 Korea ]
• Hyung-Seop Shin [ Department of Mechanical Design Engineering, Andong National University, Andong 760-749 Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537