Fabrication of helix–fiber composites with mechanically coupled core-wrapping for programmable properties

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