The Axial Tensile Stress-Strain Characterization of Ag-Sheathed Bi2212 Round Wire
The Axial Tensile Stress-Strain Characterization of Ag-Sheathed Bi2212 Round Wire
复制标题
Ag护套Bi2212圆线的轴向拉伸应力应变特性
DOI：
10.1109/tasc.2014.2368053
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发表时间：
2015-06-01
影响因子：
1.8
通讯作者：
Zhou, Chao
中科院分区：
文献类型：
--
作者：
Dai, Chao;Liu, Bo;Zhou, Chao
由热膨胀和电磁载荷的差异产生的应力分布是影响Bi 2212超导圆线（RW）输运特性的驱动因素。在RW的轴向和横向刚度方面，研究应变对输运性质的影响的努力正在增加。因此，需要RW级的实验应力-应变数据进行精确建模、分析，并最终优化电缆设计和制造。本文分别在室温、77 K和4.2K下对Bi 2212电阻丝及其组成材料（Ag和Ag/Mg合金）进行了轴向拉伸实验。与LTS链相比（例如，Nb 3Sn和NbTi），Bi 2212 RW的刚度较小，这已成为其应用中的首要问题。采用一个简单的模型来模拟应力-应变特性，并与实验结果进行比较。
The stress distribution generated by the differences in the thermal expansion and the electromagnetic load is the driving factor for the transport properties of Bi2212 superconducting round wire (RW). The effort on studying the impact of strain on the transport properties is increasing, in terms of the axial and transverse stiffness of the RW. Consequently, the experimental stress-strain data are required at the RW level for accurate modeling, analysis and eventually for optimizing cable design and manufacture. In this paper, the axial tensile measurements on Bi2212 RWs and component materials (Ag and Ag/Mg alloy) have been performed at room temperature, 77 K and 4.2 K, respectively. Comparing with LTS strand (e.g., Nb3Sn and NbTi), the stiffness of Bi2212 RW is less, which has become the primary problem in its application. A simple model was used to simulate the stress-strain characteristic, and compared to experimental results.