Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Thermal Stress Due to a Hot - Spot on the Laminated Plate in High Temperature Superconducting Fault Current Limiter

적층판으로 제작된 고온초전도 한류기에 발생한 국부적 열폭주 점에 대한 열응력 해석

  • 양경진 (전남대학교 대학원 자동차공학부) ;
  • 강기주 (전남대학교 자동차공학부)
  • Published : 2003.05.01
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Abstract

Analysis for the thermal stress distribution in the laminated plates containing a hot-spot(local heating region) is performed. It is assumed that the local heating region induces only mechanical stress by the thermal expansion but effect of the thermal conduction is neglected. The region is regarded equivalent to a homogeneous inclusion expanding in a laminated medium. As an example, Au/YBCO/Al$_2$O$_3$laminate which is often employed for High Temperature Superconducting Fault Current Limiter(HTS FCL) has been analyzed. Effects of heat input, thickness of each layer and the got spot size upon the stress distribution in the hot-spot have been investigated. For a constant heat generation into the hot-spot, as the thickness of the Al$_2$O$_3$substrate increases, the stress in the YBCO layer is peculiarly oscillated, and the curvature of laminate has a maximum at a certain thickness of the Al$_2$O$_3$.

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References

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