中文摘要：

运用ANSYS软件建立Nb3Sn超导股线的二维截面简单模型,采用有限元方法研究平板压缩和凹面板压缩方式对Nb3Sn超导股线在4.2K低温下受不同的压力下弹塑性应变的影响.通过分析得出：两种不同的压缩方式使Nb3Sn股线中超导区域的中间位置的应变比靠近外层位置的应变要大;受同样压力作用下,平板压缩导致的超导区域的平均应变要比凹面板平均应变大.采用该有限元模型,研究了Nb3Sn超导股线三个不同位置上产生的空隙在压力作用下对超导股线的弹塑性应变的影响.通过分析可得出：空隙会使股线中的超导区域的平均应变增大,并且越靠近施力点的空隙对平均应变影响越大;在具有相同位置的空隙下,平板压缩导致的超导区域的平均应变要比凹面板平均应变大.

英文摘要：

The ANSYS program was used to build the simple 2D cross-section of Nb3Sn strand and the finite element method was adopted to analyze the elastic-plastic strain performance of Nb3Sn strand under the flat or concave compress condition at 4.2K.According to the analysis,the strain in the middle of the Nb3Sn area caused by the two compress models is larger than the outside area; the average of the strain in Nb3Sn area caused by the flat compress model is larger than concave compress model under the same press load.The research was done on the elastic-plastic strain performance of Nb3Sn strand under the compress load with three different void location.According to the analysis,the void in the strand makes the average strain larger in Nb3Sn area and the void to be the closer to the load impact greatly on the average strain.The average of the strain in Nb3Sn area caused by the flat compress model is larger than concave compress model with the same void location at the same compress load.