RE Ba 2 Cu 3 O 7-x ( RE —rare earth, Ba—barium, Cu—copper, O—oxygen) tapes used in common multilayer superconducting cables, such as Roebel cable, twisted stacked tape cable or vonductor on round core/tube (CORC ® /CORT), undergo shape modifications during the cable production. In particular, the tapes edges are regularly raised due to the Poisson effect during bending of tapes in the cable assembling process. This kind of deformation amplifies the local strain in subsequent layers, endangering the capability to transport electrical current. We explore such deformation by numerical and analytical calculations validated by experiments. Three-point bending device submerged in liquid nitrogen was developed for this purpose. We found that, if the orientation of Poisson effect deformations is along the tape length, the local strain is reduced and performance of the cable remains unaffected. In contrary, the local deformations ...

中文翻译：

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局部几何不规则对圆形电缆中REBCO胶带的临界电流的影响

RE Ba 2 Cu 3 O 7-x（RE-稀土，钡钡，铜铜，O-氧）胶带，用于常见的多层超导电缆，例如Roebel电缆，双绞带式电缆或圆芯上的vonductor管（CORC®/ CORT），在电缆生产过程中会进行形状修改。特别地，在电缆组装过程中，在弯曲带子期间，由于泊松效应，带子边缘规则地升高。这种变形会放大后续层中的局部应变，从而危及传输电流的能力。我们通过实验验证的数值和解析计算来探索这种变形。为此，开发了浸入液氮中的三点弯曲装置。我们发现，如果泊松效应变形的方向沿着磁带长度，减少了局部应变，并且电缆的性能保持不变。相反，局部变形...