Investigation of the Mechanical Properties of Miura-Ori Auxetic Woven Fabrics with Variable Initial Dihedral Fold Angles.

Auxetic textiles, characterized by a negative Poisson's ratio, offer considerable promise for innovative applications across multiple fields. In our earlier work, Miura-ori-inspired auxetic fabrics with three different initial dihedral fold angles-30°, 45°, and 60°-were successfully fabricated via jacquard weaving. Their fundamental auxetic behaviors were evaluated, showing deformation characteristics consistent with those in their geometric models. This study further investigates the mechanical properties of Miura-ori-based auxetic woven fabrics. Tensile testing, air permeability measurement, compression performance assessment, and repeated-loading cyclic rope-stretching tests were performed on the three fabric variants. The results show that the fabrics exhibit excellent air permeability, which increases with the proportion of the folded areas; the highest air permeability was observed at Miura-30°. Moreover, Miura-60° exhibited superior compression resistance. The fabrics also demonstrated outstanding structural stability under cyclic tensile loading, exhibiting optimal elastic recovery at the 30° configuration. Collectively, these findings provide a solid theoretical basis for future applications of Miura-ori auxetic woven fabrics.