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Geometrical modeling and mechanical behavior analysis of Nb3Sn Rutherford cable
Cryogenics ( IF 2.1 ) Pub Date : 2021-09-08 , DOI: 10.1016/j.cryogenics.2021.103361
Libin Jiang 1, 2 , Junjie Zhao 3 , Yuanwen Gao 1, 2 , Youhe Zhou 1, 2
Affiliation  

The energy upgrade of the Large Hadron Collider and Future Circular Collider propose new requirement that the magnetic field of accelerate magnets is up to 16 T. Nb3Sn Rutherford cables are used in magnet design for such high level magnetic field. Rutherford cables must undergo complex stress conditions owing to the extreme magnetic environment and complicated cabling process which often leads to mechanical instability. In this study, a three-dimensional model is established and analyzed to better understand the mechanical behavior of Rutherford cables subjected to different loading conditions during the cabling process. A rapid approach to construct the geometry of a Rutherford cable is first presented, followed by an analysis of its mechanical behavior under axial tension, cyclic tension and transverse compression conditions. Instability behaviors, such as “pop-out” and “cross-over”, are investigated. The results show that the friction coefficient, laying angle and core play important roles in the cable mechanical performance. For better mechanical stability of the strands in Rutherford cables, it is recommended to select a higher friction value among the strands and a laying angle between 74° and 78° for non-cored cable, whereas a larger laying angle is suggested for copper-cored cable.



中文翻译:

Nb3Sn卢瑟福电缆的几何建模和力学行为分析

大型强子对撞机和未来圆形对撞机的能量升级对加速磁铁的磁场提出了新的要求。Nb 3Sn Rutherford 电缆用于这种高强度磁场的磁体设计。由于极端的磁环境和复杂的布线过程,卢瑟福电缆必须承受复杂的应力条件,这往往会导致机械不稳定。在这项研究中,建立并分析了一个三维模型,以更好地了解卢瑟福电缆在布线过程中在不同负载条件下的力学行为。首先介绍了一种构建卢瑟福电缆几何形状的快速方法,然后分析了其在轴向拉伸、循环拉伸和横向压缩条件下的机械性能。研究了不稳定行为,例如“弹出”和“交叉”。结果表明,摩擦系数,敷设角度和芯线对电缆的机械性能起着重要作用。为使卢瑟福电缆中的股线具有更好的机械稳定性,建议在股线之间选择较高的摩擦值,无芯电缆的敷设角度在 74° 和 78° 之间,而铜芯电缆建议选择较大的敷设角度电缆。

更新日期:2021-09-15
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