Pure bending strains of Nb3Sn wires
Pure bending strains of Nb3Sn wires
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DOI：
10.1088/0953-2048/24/4/045012
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发表时间：
2011-04
影响因子：
3.6
通讯作者：
M. Takayasu;L. Chiesa;D. L. Harris;A. Allegritti;J. Minervini
中科院分区：
文献类型：
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作者：
M. Takayasu;L. Chiesa;D. L. Harris;A. Allegritti;J. Minervini
本文详细介绍了最近的ITER Nb_3Sn导线的纯弯曲应变研究，包括纯弯曲装置的开发，弯曲对临界电流的影响及其模型分析。纯弯曲测试装置允许在大电磁洛伦兹力下在大范围的弯曲应变上对股线样品施加均匀弯曲。五种不同的Nb3Sn线，包括三个内部锡和两个青铜线的纯弯曲特性进行了测试和评估与新开发的综合模型，占中性轴偏移，电流传输长度，机械灯丝断裂和单轴应变释放由于施加弯曲载荷。
This paper presents in detail recent pure bending strain investigations of ITER Nb3Sn wires including a pure bending device development, bending effects on the critical currents and their model analyses. The pure bending test device allows applying a uniform bending over a large range of bending strain on a strand sample under a large electromagnetic Lorentz force. Pure bending characteristics of five different Nb3Sn wires including three internal tin and two bronze wires were tested and evaluated with a newly developed integrated model that accounts for neutral axis shift, current transfer length, mechanical filament breakage and uniaxial strain release due to the applied bending load.