Large strain zero Poisson’s ratio spring cell metamaterial with critical defect analysis and variable stiffness distributions

This paper presents novel metamaterial skins formed by 3D Spring Cells exhibiting zero Poisson’s ratio in two directions with no stress concentration on joints. Precise CAD models are generated to perform numerical and experiment analysis. High-fidelity Finite element developed assess the homogenisation study of ratio. Moreover, analytical method is also used present for normalised Young’s modulus. Parametric effect parameter modulus demonstrated based method. Pure shear analysis show off-axis loading behaviour. Structural defect investigated regarding its deformation mechanism under tensile strain. Furthermore, variable stiffness distribution Cell metamaterials while maintaining large strain The frequency buckling spring cells compared equivalent shell. their mechanical behaviours including investigated. Experiment performed validate force–displacement, mechanisms discussed simulations. Finally, construction material taking investigate relations between variety types material.