Fig. 2: Mechanical behaviors of the S-AUX films.
From: A seamless auxetic substrate with a negative Poisson’s ratio of −1
a–c Relative change in Poisson’s ratio of S-AUX films under uniaxial tensile strain according to: (a) Types of glass-fabric reinforcements in GFRPDMS films, which form the rigid domain and are filled with PDMS 10:1; (b) Types of silicone elastomers used to fill the perforations in the auxetic structured woven GFRPDMS film; (c) Ecoflex-filled woven GFRPDMS films with 4, 6, and 8 layers of glass-fabrics, yielding total thicknesses of 100, 150, and 200 μm, respectively (c). d Relative change in Poisson’s ratio with uniaxial tensile strain for various differences in moduli between the rigid and soft elastic domains (Erigid/Estretchable). The graph ends at the point of any fracture in any part of the film. e Stress-strain curve of an S-AUX film, illustrating five phases characterized by distinct slopes. Inset images depict the configurations of the film during each phase or at transition points.
