Helix-fiber composites (HFCs), which involve wrapping a material around a flexible core, are of interest for intelligent stretchable functional materials or devices. Here, we reveal that mechanical coupling between the core and wrapping plays a critical role in controlling the structure and mechanical properties. Our results show that the mechanical properties of the HFC can be programmed by precisely tuning the mechanical coupling strength among them. Interestingly, the HFC also shows unique pseudo-elastic behavior under large strain due to the mechanical coupling effects. The HFC is demonstrated as an elastic metal conductor, programmable sensor, and finally as an elastic mold for structure transplantation by mechanically decoupling the elastomer core from the helix fiber. The results not only deepen the fundamental understanding of HFCs, but also may promote future structure-properties and fabrication studies on helix-structured functional composite and devices.

螺旋纤维复合材料 (HFC) 涉及将材料包裹在柔性核心周围，可用于智能可拉伸功能材料或设备。在这里，我们揭示了核心和包裹之间的机械耦合在控制结构和机械性能方面起着关键作用。我们的结果表明，HFC 的机械性能可以通过精确调整它们之间的机械耦合强度来编程。有趣的是，由于机械耦合效应，HFC 在大应变下也表现出独特的伪弹性行为。HFC 被证明是一种弹性金属导体、可编程传感器，最后作为一种弹性模具，通过将弹性体芯与螺旋纤维机械分离来进行结构移植。结果不仅加深了对 HFC 的基本理解，