Multi-stable mechanical metamaterials with shape-reconfiguration and zero Poisson's ratio. (15th August 2018)

• Record Type: Journal Article
• Authors: Yang, Hang; Ma, Li
• Is Part Of: Materials & design. Volume 152(2018)
• Page Start: 181
• Page End: 190
• Publication Date: 2018-08-15
• Subjects: Mechanical metamaterials -- Multi-stability -- Shape-reconfiguration -- Zero Poisson's ratio -- Topology analysis -- Variable stiffness and strength; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2018.04.064
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: We investigate the mechanical response of elastic solids perforated with double-U array of parallel fine crack, which leaves tailored mechanical metamaterials containing repeated snapping units with programmed tensile behavior. Our results indicate that under uniaxial tension the metamaterials undergo a large extension caused by buckling snap-through instabilities, and exhibit very small transverse deformation. We find that by largely stretching the pre-cracked specimens, nonlinear mechanical responses including self-recovering snapping and multi-stability enabling snapping behaviors can be generated by tuning the relative stiffness of the curved segments. On this basis, topology analysis is carried out to design three-dimensional (3D) multi-stable configurations for practical applications such as shape-reconfigurable tubes as well as variable stiffness and strength material. This work gives rise to the design, analysis and manufacture of zero Poisson's ratio and shape-reconfigurable materials. Graphical abstract: Unlabelled Image Highlights: A class of novel 2D and 3D multi-stable mechanical metamaterials are proposed. Self-recovering and multi-stability enabling snapping are classified due to geometric parameters. Shape-reconfigurable zero Poisson's ratio is achieved up to large deformation. Variable stiffness and strength material based on multi-stability are proposed.