In-Plane Deformation Behavior and the Open Area of Rotating Squares in an Auxetic Compound Fabric

Abstract

A conventional compound fabric was used to develop a modern, multifunctional material with an auxetic behaviour and a tailored open area for particle filtration. Such material was produced using traditional textile technology and laser cutting, to induce a rotating squares unit geometry. The behaviour was investigated of three different rotating unit cell sizes. The laser slit thickness and the length of the hinges were equal for all three-unit cells. The tensile properties, Poisson’s ratio and auxetic behaviour of the tested samples were investigated, especially the influence of longitudinal displacement on the fabric’s open area and the filtered particle sizes (average and maximum). Results show that the developed compound fabric possesses an average negative Poisson’s ratio of up to −1, depending on the applied auxetic geometry. The larger rotating cell size samples offer a higher average negative Poisson’s ratio and a higher breaking strength due to the induced slits. The findings highlight the usefulness of patterned cuts in conventional textile materials to develop advanced auxetic textile materials with tailored geometrical and mechanical properties.

Computational Study of Non-Porous Auxetic Plates with Diamond Shape Inclusions

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Shape Memory Alloy Thin Film Auxetic Structures

“…This is validated by studies that have reported the change of Poisson's ratio as a function of strain. [ 9,49 ] The SME sample results, illustrated in Figure 7b, are characterized by higher intrinsic strains (see Figure 2). This leads to higher stretchability compared to superelastic material, and the results are shown in Figure 7a.…”

Skin‐like Omnidirectional Stretchable Platform with Negative Poisson's Ratio for Wearable Strain–Pressure Simultaneous Sensor

“…The slight shifting behavior of the PR with respect to the applied strain is a general characteristic of rotating square-shaped auxetic metamaterials. [32,33] This phenomenon occurred because of a nonlinear (i.e., sinusoidal) relationship between the degree of expansion in the axial direction and the rotating angle of the rotating square units.…”