管内电缆导体（CICC）是大型超导磁体的首选导体，如ITER及强磁场装置等。CICC导体由多级扭绞的电缆和不锈钢铠甲组成。导体制造及低温运行过程中，Nb3Sn超导线的应力应变状态影响着导体的性能。超导线的应力应变主要由绞缆，导体热应变，Lorentz力引起。超导电缆结构复杂，线与线之间存在多级扭绞及接触，接触力及接触变形也影响着单线应力应变的变化。本课题将对CICC导体进行力学模型分析，模拟各种状态下电缆及单线的应力应变,同时开展电缆力学性能实验。对CICC导体进行力学性能研究，有利于导体性能分析及设计，优化电缆结构及绞制技术，为CICC导体设计及制造提供理论基础。

Besides the temperature and magnetic field, the strain and stress state of the superconducting Nb3Sn wires in multi-stage twisted cable-in-conduit conductors (CICCs), as applied in ITER or high field magnets, strongly influence their transport properties. For an accurate quantitative prediction of the performance and a proper understanding of the underlying phenomena, a detailed analysis of the strain distribution along all individual wires is required. For this, the thermal contraction of the different components and the huge electromagnetic forces imposing bending and contact deformation must be taken into account, following the complex strand pattern and mutual interaction by contacts from surrounding strands. We want to propose one numerical model for CICC, which can simulate the strain and stress states of all single wires including interstrand contact force and associated deformation. The simulation results are essential for the analysis and conductor design optimization from cabling to final magnet operation conditions. Recommendations are given for conductor design improvements.