One of the newly developed technologies is in composite coiled tubing, which offers the potential of exceeding the performance of metallic alloys. The high strains due to bending and the complex state of stress in those tubes make it essential to understand the relation between microstructure and performance of coiled tubing.
Braided composites can withstand high bending deformation without property degradation.
In this work, braided hybrid composites are presented as an option for achieving high performance under multiple loading conditions. Through the application of theoretical analysis and experimental characterization, the influence of fiber architecture on the mechanical and thermal properties of braided hybrid composites is investigated. Braid angle and fiber volume fraction are considered as the essential factors that affect the performance of braided hybrid composites. The effects of the axial yarn stiffness, axial yarn volume fraction, and braid angle on composite axial-tensile, transverse tensile, bending, and compression behavior have been examined experimentally. Finally, the thermal behavior is studied using dynamic-mechanical analysis.