Both the pancake coiling and conductor on round core (CORC) cabling processes consist of winding second-generation high-temperature superconducting tape (REBCO) in a core. The contact behavior between the tape and the core during the winding process directly affects the critical current, cable flexibility, mechanical support and electrical contact resistance. Therefore, the winding process needs to be optimized to produce pancake coils and CORC cables with the desired electrical and mechanical properties. This paper comprehensively considers the role of the relaxation and Poisson effects. The theoretical model and the finite element model (FEM) for calculating the contact stress during the winding process are established, and a formula for the estimation of the contact force is proposed. The suitable winding pre-tension force, winding curvature radius of SCS2030 (2 mm width and 30 m substrate thickness) and SCS4050 (4 mm width and 50 m substrate thickness) of REBCO tapes are obtained and discussed by accounting for the relaxation effect and the critical current degradation limit. With consideration of the Poisson effect, the nonlinear contact behavior is investigated. In addition, the relaxation effect, Poisson effect and plasticity of the REBCO tape are taken into account in the FEM model. The results show that the axial strain in the REBCO layer during the winding process is related to the contact behavior. The greater the winding pre-tension force, the smaller the helical curvature radius, and the greater the contact force. The distribution of contact stress for several winding factors (winding pre-tension force, winding angle and the core radius) is divided into three contact types: the single-line contact, the double-line contact and the surface contact. The FEM model results are consistent with the theoretical evaluation and are more suitable for practical winding cases. This research is the basis for designing and optimizing pancake coils and CORC cables.

薄饼盘绕和圆芯导体 (CORC) 布线工艺都包括在芯中缠绕第二代高温超导带 (REBCO)。缠绕过程中胶带和磁芯之间的接触行为直接影响临界电流、电缆柔韧性、机械支撑和电气接触电阻。因此，需要优化缠绕工艺以生产具有所需电气和机械性能的扁平线圈和 CORC 电缆。本文综合考虑了松弛效应和泊松效应的作用。建立了计算缠绕过程接触应力的理论模型和有限元模型（FEM），并提出了计算接触力的公式。合适的缠绕预紧力，m 基板厚度）和 SCS4050（4 毫米宽和 50m 基板厚度）的 REBCO 胶带通过考虑松弛效应和临界电流退化限制来获得和讨论。考虑到泊松效应，研究了非线性接触行为。此外，有限元模型还考虑了 REBCO 胶带的松弛效应、泊松效应和可塑性。结果表明，卷绕过程中 REBCO 层中的轴向应变与接触行为有关。缠绕预紧力越大，螺旋曲率半径越小，接触力越大。几种绕线因素（绕线预张力、绕线角度和芯半径）的接触应力分布分为三种接触类型：单线接触、双线接触和面接触。有限元模型结果与理论评估一致，更适合实际绕组情况。这项研究是设计和优化扁平线圈和 CORC 电缆的基础。