Revealing Temperature‐Dependent Compression of Three‐Dimensional Woven Tubular Composites With Varied Architectural Structures

ABSTRACT Three‐dimensional woven tubular composites (3DWTCs) are critical in high‐temperature engineering scenarios, but the mechanism by which structural design regulates their temperature‐sensitive compressive behavior remains unclear. This study innovatively investigates three distinct 3DWTC configurations (through orthogonal [TO], shallow cross‐linked [SCL], and shallow‐crossed curved joint [SCCJ]) to address the unmet need for insights into the high‐temperature performance of multistructural 3DWTCs. By integrating macro‐/micro‐characterization and finite element analysis (FEA), we systematically investigated their lateral/axial compressive properties and failure mechanisms over the temperature range of 20°C–150°C. 118°C (the glass transition temperature, T _g , of the epoxy matrix) is identified as the critical threshold: below this temperature, brittle fracture dominates, whereas above it, fiber slippage and interfacial debonding lead to 70%–85% property degradation at 150°C. Structural characteristics govern the compressive performance: the SCL configuration outperforms others in lateral compression owing to optimized yarn interlacing, while the TO configuration excels in axial compression through warp‐oriented load transfer. The FEA model accurately reproduces the experimental results, validating its reliability. This work clarifies the structure–temperature–performance coupling mechanism of 3DWTCs, filling the gap in multistructural high‐temperature research. It provides direct theoretical and data support for the heat‐resistant design, safety assessment, and material/structural optimization of lightweight energy‐absorbing components applied in aerospace, automotive, and industrial equipment.